H03F1/00	7	Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements	H03F1/00	H03F1/00		198
H03F1/02	8	Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation	H03F1/02	H03F1/02		1597
H03F1/0205	9	{in transistor amplifiers}	H03F1/02	H03F1/02		1715
H03F1/0211	10	{with control of the supply voltage or current}	H03F1/02	H03F1/02		1426
H03F1/0216	11	{Continuous control}	H03F1/02	H03F1/02		327
H03F1/0222	12	{by using a signal derived from the input signal}	H03F1/02	H03F1/02		1039
H03F1/0227	13	{using supply converters}	H03F1/02	H03F1/02		1154
H03F1/0233	12	{by using a signal derived from the output signal, e.g. bootstrapping the voltage supply}	H03F1/02	H03F1/02		488
H03F1/0238	13	{using supply converters}	H03F1/02	H03F1/02		222
H03F1/0244	11	{Stepped control}	H03F1/02	H03F1/02		444
H03F1/025	12	{by using a signal derived from the input signal}	H03F1/02	H03F1/02		306
H03F1/0255	12	{by using a signal derived from the output signal}	H03F1/02	H03F1/02		87
H03F1/0261	10	{with control of the polarisation voltage or current, e.g. gliding Class A}	H03F1/02	H03F1/02		1187
H03F1/0266	11	{by using a signal derived from the input signal}	H03F1/02	H03F1/02		546
H03F1/0272	11	{by using a signal derived from the output signal}	H03F1/02	H03F1/02		340
H03F1/0277	10	{Selecting one or more amplifiers from a plurality of amplifiers}	H03F1/02	H03F1/02		1106
H03F1/0283	10	{Reducing the number of DC-current paths}	H03F1/02	H03F1/02		116
H03F1/0288	10	{using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers}	H03F1/02	H03F1/02		1785
H03F1/0294	10	{using vector summing of two or more constant amplitude phase-modulated signals}	H03F1/02	H03F1/02		353
H03F1/04	9	in discharge-tube amplifiers	H03F1/04	H03F1/04		162
H03F1/06	10	to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators {(modulation H03C)}	H03F1/06	H03F1/06		191
H03F1/07	11	Doherty-type amplifiers	H03F1/07	H03F1/07		226
H03F1/08	8	Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements (wide-band amplifiers with inter-stage coupling networks incorporating these impedances H03F1/42)	H03F1/08	H03F1/08		850
H03F1/083	9	{in transistor amplifiers (H03F1/10&#160;-&#160;H03F1/22 take precedence)}	H03F1/08	H03F1/08		564
H03F1/086	10	{with FET&apos;s}	H03F1/08	H03F1/08		476
H03F1/10	9	by use of amplifying elements with multiple electrode connections	H03F1/10	H03F1/10		37
H03F1/12	9	by use of attenuating means {(attenuators H03G)}	H03F1/12	H03F1/12		116
H03F1/13	10	in discharge-tube amplifiers	H03F1/13	H03F1/13		98
H03F1/14	9	by use of neutralising means	H03F1/14	H03F1/14		373
H03F1/16	10	in discharge-tube amplifiers	H03F1/16	H03F1/16		469
H03F1/18	9	by use of distributed coupling {, i.e. distributed amplifiers (distributed amplifiers using coupling networks with distributed constants H03F3/605)}	H03F1/18	H03F1/18		115
H03F1/20	10	in discharge-tube amplifiers	H03F1/20	H03F1/20		104
H03F1/22	9	by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively	H03F1/22	H03F1/22		613
H03F1/223	10	{with MOSFET&apos;s}	H03F1/22	H03F1/22		1537
H03F1/226	10	{with junction-FET&apos;s}	H03F1/22	H03F1/22		91
H03F1/24	10	in discharge-tube amplifiers	H03F1/24	H03F1/24		11
H03F1/26	8	Modifications of amplifiers to reduce influence of noise generated by amplifying elements	H03F1/26	H03F1/26		3603
H03F1/28	9	in discharge-tube amplifiers {(constructional modifications H01J23/11)}	H03F1/28	H03F1/28		126
H03F1/30	8	Modifications of amplifiers to reduce influence of variations of temperature or supply voltage {or other physical parameters (in differential amplifiers H03F3/45479)}	H03F1/30	H03F1/30		2302
H03F1/301	9	{in MOSFET amplifiers (H03F1/303, H03F1/305, H03F1/308 take precedence)}	H03F1/30	H03F1/30		1364
H03F1/302	9	{in bipolar transistor amplifiers (H03F1/303, H03F1/305, H03F1/307 take precedence)}	H03F1/30	H03F1/30		1360
H03F1/303	9	{using a switching device (H03F1/305, H03F3/005, H03F3/38 take precedence)}	H03F1/30	H03F1/30		648
H03F1/304	10	{and using digital means}	H03F1/30	H03F1/30		141
H03F1/305	9	{in case of switching on or off of a power supply}	H03F1/30	H03F1/30		654
H03F1/306	9	{in junction-FET amplifiers (H03F1/303, H03F1/305, H03F1/309 take precedence)}	H03F1/30	H03F1/30		160
H03F1/307	9	{in push-pull amplifiers}	H03F1/30	H03F1/30		261
H03F1/308	10	{using MOSFET}	H03F1/30	H03F1/30		146
H03F1/309	10	{using junction-FET}	H03F1/30	H03F1/30		5
H03F1/32	8	Modifications of amplifiers to reduce non-linear distortion (by negative feedback H03F1/34)	H03F1/32	H03F1/32		2610
H03F1/3205	9	{in field-effect transistor amplifiers}	H03F1/32	H03F1/32		1056
H03F1/3211	9	{in differential amplifiers}	H03F1/32	H03F1/32		1190
H03F1/3217	9	{in single ended push-pull amplifiers}	H03F1/32	H03F1/32		305
H03F1/3223	9	{using feed-forward (H03F1/3211 takes precedence)}	H03F1/32	H03F1/32		406
H03F1/3229	10	{using a loop for error extraction and another loop for error subtraction}	H03F1/32	H03F1/32		419
H03F1/3235	11	{using a pilot signal}	H03F1/32	H03F1/32		160
H03F1/3241	9	{using predistortion circuits (H03F1/3211, H03F1/3217 take precedence)}	H03F1/32	H03F1/32		1537
H03F1/3247	10	{using feedback acting on predistortion circuits (H03F1/3264 takes precedence)}	H03F1/32	H03F1/32		2141
H03F1/3252	10	{using multiple parallel paths between input and output (H03F1/3258, H03F1/3282, H03F1/3294 take precedence)}	H03F1/32	H03F1/32		240
H03F1/3258	10	{based on polynomial terms}	H03F1/32	H03F1/32		552
H03F1/3264	10	{in audio amplifiers}	H03F1/32	H03F1/32		100
H03F1/327	11	{to emulate discharge tube amplifier characteristics}	H03F1/32	H03F1/32		81
H03F1/3276	10	{using the nonlinearity inherent to components, e.g. a diode}	H03F1/32	H03F1/32		288
H03F1/3282	10	{Acting on the phase and the amplitude of the input signal}	H03F1/32	H03F1/32		388
H03F1/3288	11	{to compensate phase shift as a function of the amplitude}	H03F1/32	H03F1/32		117
H03F1/3294	10	{Acting on the real and imaginary components of the input signal}	H03F1/32	H03F1/32		369
H03F1/33	9	in discharge-tube amplifiers	H03F1/33	H03F1/33		187
H03F1/34	8	Negative-feedback-circuit arrangements with or without positive feedback (H03F1/02 - H03F1/30, H03F1/38 - H03F1/50, H03F3/50 take precedence {; for rejection of common mode signals H03F3/45479})	H03F1/34	H03F1/34		2088
H03F1/342	9	{in field-effect transistor amplifiers}	H03F1/34	H03F1/34		508
H03F1/345	9	{using hybrid or directional couplers}	H03F1/34	H03F1/34		103
H03F1/347	9	{using transformers}	H03F1/34	H03F1/34		324
H03F1/36	9	in discharge-tube amplifiers	H03F1/36	H03F1/36		1002
H03F1/38	8	Positive-feedback circuit arrangements without negative feedback	H03F1/38	H03F1/38		166
H03F1/40	9	in discharge-tube amplifiers	H03F1/40	H03F1/40		51
H03F1/42	8	Modifications of amplifiers to extend the bandwidth	H03F1/42	H03F1/42		1439
H03F1/48	9	of aperiodic amplifiers	H03F1/48	H03F1/48		327
H03F1/483	10	{with field-effect transistors}	H03F1/48	H03F1/48		203
H03F1/486	10	{with IC amplifier blocks}	H03F1/48	H03F1/48		124
H03F1/50	10	with tubes only	H03F1/50	H03F1/50		541
H03F1/52	8	Circuit arrangements for protecting such amplifiers {(monitoring arrangements G01R31/28; increasing reliability in communication systems, e.g. using redundancy H04B1/74)}	H03F1/52	H03F1/52		2275
H03F1/523	9	{for amplifiers using field-effect devices (H03F1/526 takes precedence)}	H03F1/52	H03F1/52		792
H03F1/526	9	{protecting by using redundant amplifiers}	H03F1/52	H03F1/52		126
H03F1/54	9	with tubes only {(testing of vacuum tubes G01R31/25)}	H03F1/54	H03F1/54		505
H03F1/542	10	{Replacing by standby devices}	H03F1/54	H03F1/54		177
H03F1/544	10	{Protection of filaments}	H03F1/54	H03F1/54		110
H03F1/546	10	{Delaying application of anode power supply with respect to application of filament heating power supply}	H03F1/54	H03F1/54		84
H03F1/548	10	{Protection of anode or grid circuit against overload}	H03F1/54	H03F1/54		220
H03F1/56	8	Modifications of input or output impedances, not otherwise provided for	H03F1/56	H03F1/56		3728
H03F1/565	9	{using inductive elements}	H03F1/56	H03F1/56		2761
H03F3/00	7	Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements<br><br><u>NOTE</u><br><br>Groups H03F3/20 - H03F3/72 take precedence over groups H03F3/02 - H03F3/189.<br>This Note corresponds to IPC Note (1) relating to H03F3/02 - H03F3/189.	H03F3/00	H03F3/00		207
H03F3/005	8	{using switched capacitors, e.g. dynamic amplifiers; using switched capacitors as resistors in differential amplifiers (H03F3/45 takes precedence)}	H03F3/00	H03F3/00		643
H03F3/02	8	with tubes only	H03F3/02	H03F3/02		567
H03F3/04	8	with semiconductor devices only	H03F3/04	H03F3/04		646
H03F3/06	9	using hole storage effect	H03F3/06	H03F3/06		2
H03F3/08	9	controlled by light	H03F3/08	H03F3/08		836
H03F3/082	10	{with FET&apos;s (H03F3/085 takes precedence)}	H03F3/08	H03F3/08		469
H03F3/085	10	{using opto-couplers between stages}	H03F3/08	H03F3/08		138
H03F3/087	10	{with IC amplifier blocks (H03F3/085 takes precedence)}	H03F3/08	H03F3/08		763
H03F3/10	9	with diodes {(parametric amplifiers H03F7/00)}	H03F3/10	H03F3/10		184
H03F3/12	10	with Esaki diodes	H03F3/12	H03F3/12		149
H03F3/14	9	with amplifying devices having more than three electrodes or more than two PN junctions	H03F3/14	H03F3/14		99
H03F3/16	9	with field-effect devices	H03F3/16	H03F3/16		454
H03F3/165	10	{with junction-FET&apos;s}	H03F3/16	H03F3/16		95
H03F3/181	8	Low-frequency amplifiers, e.g. audio preamplifiers	H03F3/181	H03F3/181		939
H03F3/183	9	with semiconductor devices only	H03F3/183	H03F3/183		1089
H03F3/185	10	with field-effect devices (H03F3/187 takes precedence)	H03F3/185	H03F3/185		416
H03F3/1855	11	{with junction-FET devices}	H03F3/185	H03F3/185		78
H03F3/187	10	in integrated circuits	H03F3/187	H03F3/187		967
H03F3/189	8	High-frequency amplifiers, e.g. radio frequency amplifiers	H03F3/189	H03F3/189		2108
H03F3/19	9	with semiconductor devices only	H03F3/19	H03F3/19		3901
H03F3/191	10	Tuned amplifiers (H03F3/193, H03F3/195 take precedence)	H03F3/191	H03F3/191		868
H03F3/193	10	with field-effect devices (H03F3/195 takes precedence)	H03F3/193	H03F3/193		2805
H03F3/1935	11	{with junction-FET devices}	H03F3/193	H03F3/193		332
H03F3/195	10	in integrated circuits	H03F3/195	H03F3/195		4825
H03F3/20	8	Power amplifiers, e.g. Class B amplifiers, Class C amplifiers (H03F3/26&#160;-&#160;H03F3/30 take precedence)	H03F3/20	H03F3/20		1876
H03F3/21	9	with semiconductor devices only {(H03F3/245 takes precedence)}	H03F3/21	H03F3/21		2347
H03F3/211	10	{using a combination of several amplifiers (H03F3/60 takes precedence)}	H03F3/21	H03F3/21		3704
H03F3/213	10	in integrated circuits	H03F3/213	H03F3/213		1465
H03F3/217	10	Class D power amplifiers; Switching amplifiers	H03F3/217	H03F3/217		2427
H03F3/2171	11	{with field-effect devices (H03F3/2173&#160;-&#160;H03F3/2178 take precedence)}	H03F3/217	H03F3/217		983
H03F3/2173	11	{of the bridge type}	H03F3/217	H03F3/217		1232
H03F3/2175	11	{using analogue-digital or digital-analogue conversion (H03F3/2173 takes precedence)}	H03F3/217	H03F3/217		434
H03F3/2176	11	{Class E amplifiers}	H03F3/217	H03F3/217		347
H03F3/2178	11	{using more than one switch or switching amplifier in parallel or in series (H03F3/2173, H03F3/2175 take precedence)}	H03F3/217	H03F3/217		362
H03F3/22	9	with tubes only (H03F3/24 takes precedence)	H03F3/22	H03F3/22		283
H03F3/24	9	of transmitter output stages	H03F3/24	H03F3/24		3506
H03F3/245	10	{with semiconductor devices only}	H03F3/24	H03F3/24		5118
H03F3/26	8	Push-pull amplifiers; Phase-splitters therefor (duplicated single-ended push-pull arrangements or phase-splitters therefor H03F3/30)	H03F3/26	H03F3/26		877
H03F3/265	9	{with field-effect transistors only}	H03F3/26	H03F3/26		381
H03F3/28	9	with tubes only	H03F3/28	H03F3/28		607
H03F3/30	8	Single-ended push-pull {[SEPP]} amplifiers {(single-ended sense amplifiers G11C7/067)}; Phase-splitters therefor	H03F3/30	H03F3/30		239
H03F3/3001	9	{with field-effect transistors}	H03F3/30	H03F3/30		339
H03F3/3008	10	{Bifet SEPP output stages}	H03F3/30	H03F3/30		56
H03F3/301	10	{CMOS common drain output SEPP amplifiers (H03F3/3008 takes precedence)}	H03F3/30	H03F3/30		63
H03F3/3011	11	{with asymmetrical driving of the end stage}	H03F3/30	H03F3/30		14
H03F3/3013	12	{using a common drain driving stage, i.e. follower stage}	H03F3/30	H03F3/30		7
H03F3/3015	12	{using a common source driving stage, i.e. inverting stage}	H03F3/30	H03F3/30		10
H03F3/3016	11	{with symmetrical driving of the end stage}	H03F3/30	H03F3/30		52
H03F3/3018	12	{using opamps as driving stages}	H03F3/30	H03F3/30		23
H03F3/302	12	{using two SEPP driving stages}	H03F3/30	H03F3/30		2
H03F3/3022	10	{CMOS common source output SEPP amplifiers (H03F3/3008 takes precedence)}	H03F3/30	H03F3/30		447
H03F3/3023	11	{with asymmetrical driving of the end stage}	H03F3/30	H03F3/30		127
H03F3/3025	12	{using a common drain driving stage, i.e. follower stage}	H03F3/30	H03F3/30		6
H03F3/3027	12	{using a common source driving stage, i.e. inverting stage}	H03F3/30	H03F3/30		31
H03F3/3028	11	{with symmetrical driving of the end stage}	H03F3/30	H03F3/30		186
H03F3/303	12	{using opamps as driving stages}	H03F3/30	H03F3/30		134
H03F3/3032	12	{using two SEPP driving stages}	H03F3/30	H03F3/30		18
H03F3/3033	10	{NMOS SEPP output stages (H03F3/3008 takes precedence)}	H03F3/30	H03F3/30		19
H03F3/3035	11	{using differential amplifiers as phase-splitting elements}	H03F3/30	H03F3/30		8
H03F3/3037	11	{with asymmetric control, i.e. one control branch containing a supplementary phase inverting stage}	H03F3/30	H03F3/30		11
H03F3/3038	10	{PMOS SEPP output stages (H03F3/3008 takes precedence)}	H03F3/30	H03F3/30		5
H03F3/304	11	{using differential amplifiers as phase-splitting element}	H03F3/30	H03F3/30		5
H03F3/3042	11	{with asymmetric control, i.e. one control branch containing a supplementary phase inverting stage}	H03F3/30	H03F3/30		4
H03F3/3044	10	{Junction FET SEPP output stages (H03F3/3008 takes precedence)}	H03F3/30	H03F3/30		48
H03F3/3045	11	{with asymmetrical driving of the end stage}	H03F3/30	H03F3/30		5
H03F3/3047	12	{using a common drain driving stage, i.e. follower stage}	H03F3/30	H03F3/30		
H03F3/3049	12	{using a common source driving stage, i.e. inverting stage}	H03F3/30	H03F3/30		
H03F3/305	11	{with symmetrical driving of the end stage}	H03F3/30	H03F3/30		7
H03F3/3052	12	{using opamps as driving stages}	H03F3/30	H03F3/30		2
H03F3/3054	12	{using two SEPP driving stages}	H03F3/30	H03F3/30		1
H03F3/3055	10	{Parallelled mixed SEPP stages, e.g. a CMOS common drain and a CMOS common source in parallel or bipolar SEPP and FET SEPP in parallel}	H03F3/30	H03F3/30		7
H03F3/3057	11	{with asymmetrical driving of the end stage}	H03F3/30	H03F3/30		1
H03F3/3059	11	{with symmetrical driving of the end stage}	H03F3/30	H03F3/30		13
H03F3/3061	10	{Bridge type, i.e. two complementary controlled SEPP output stages}	H03F3/30	H03F3/30		56
H03F3/3062	11	{with asymmetrical driving of the end stage}	H03F3/30	H03F3/30		11
H03F3/3064	11	{with symmetrical driving of the end stage}	H03F3/30	H03F3/30		27
H03F3/3066	9	{the collectors of complementary power transistors being connected to the output}	H03F3/30	H03F3/30		256
H03F3/3067	10	{with asymmetrical driving of the end stage}	H03F3/30	H03F3/30		115
H03F3/3069	9	{the emitters of complementary power transistors being connected to the output}	H03F3/30	H03F3/30		88
H03F3/3071	10	{with asymmetrical driving of the end stage}	H03F3/30	H03F3/30		191
H03F3/3072	11	{using Darlington transistors (H03F3/3074 takes precedence)}	H03F3/30	H03F3/30		39
H03F3/3074	11	{using parallel power transistors}	H03F3/30	H03F3/30		10
H03F3/3076	10	{with symmetrical driving of the end stage}	H03F3/30	H03F3/30		273
H03F3/3077	11	{using Darlington transistors (H03F3/3079 takes precedence)}	H03F3/30	H03F3/30		59
H03F3/3079	11	{using parallel power transistors}	H03F3/30	H03F3/30		28
H03F3/3081	9	{Duplicated single-ended push-pull arrangements, i.e. bridge circuits (using FET&apos;s H03F3/3061)}	H03F3/30	H03F3/30		196
H03F3/3083	9	{the power transistors being of the same type (H03F3/3001 takes precedence)}	H03F3/30	H03F3/30		29
H03F3/3084	10	{one of the power transistors being controlled by the output signal}	H03F3/30	H03F3/30		57
H03F3/3086	10	{two power transistors being controlled by the input signal}	H03F3/30	H03F3/30		12
H03F3/3088	11	{with asymmetric control, i.e. one control branch containing a supplementary phase inverting transistor}	H03F3/30	H03F3/30		103
H03F3/3089	11	{comprising field-effect transistors in the control circuit}	H03F3/30	H03F3/30		7
H03F3/3091	11	{comprising two complementary transistors for phase-splitting}	H03F3/30	H03F3/30		88
H03F3/3093	11	{comprising a differential amplifier as phase-splitting element}	H03F3/30	H03F3/30		34
H03F3/3094	11	{Phase splitters therefor (H03F3/3088, H03F3/3091, H03F3/3093, H03F3/3096, H03F3/3098 take precedence)}	H03F3/30	H03F3/30		11
H03F3/3096	11	{using a single transistor with output on emitter and collector as phase splitter}	H03F3/30	H03F3/30		43
H03F3/3098	11	{using a transformer as phase splitter}	H03F3/30	H03F3/30		40
H03F3/34	8	DC amplifiers in which all stages are DC-coupled (H03F3/45 takes precedence)	H03F3/34	H03F3/34		145
H03F3/343	9	with semiconductor devices only	H03F3/343	H03F3/343		656
H03F3/3432	10	{with bipolar transistors}	H03F3/343	H03F3/343		165
H03F3/3435	11	{using Darlington amplifiers}	H03F3/343	H03F3/343		105
H03F3/3437	12	{with complementary transistors}	H03F3/343	H03F3/343		35
H03F3/345	10	with field-effect devices (H03F3/347 takes precedence)	H03F3/345	H03F3/345		558
H03F3/3455	11	{with junction-FET&apos;s}	H03F3/345	H03F3/345		54
H03F3/347	10	in integrated circuits	H03F3/347	H03F3/347		473
H03F3/36	9	with tubes only	H03F3/36	H03F3/36		418
H03F3/38	8	DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)}	H03F3/38	H03F3/38		281
H03F3/387	9	with semiconductor devices only	H03F3/387	H03F3/387		560
H03F3/393	10	with field-effect devices	H03F3/393	H03F3/393		286
H03F3/40	9	with tubes only	H03F3/40	H03F3/40		332
H03F3/42	8	Amplifiers with two or more amplifying elements having their DC paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers	H03F3/42	H03F3/42		172
H03F3/423	9	{with MOSFET&apos;s}	H03F3/42	H03F3/42		53
H03F3/426	9	{with junction-FET&apos;s}	H03F3/42	H03F3/42		15
H03F3/44	9	with tubes only	H03F3/44	H03F3/44		146
H03F3/45	8	Differential amplifiers (differential sense amplifiers G11C7/062)	H03F3/45	H03F3/45		1921
H03F3/45071	9	{with semiconductor devices only}	H03F3/45	H03F3/45		1064
H03F3/45076	10	{characterised by the way of implementation of the active amplifying circuit in the differential amplifier}	H03F3/45	H03F3/45		548
H03F3/4508	11	{using bipolar transistors as the active amplifying circuit (H03F3/45278 takes precedence)}	H03F3/45	H03F3/45		471
H03F3/45085	12	{Long tailed pairs (H03F3/45112, H03F3/45139 take precedence)}	H03F3/45	H03F3/45		855
H03F3/45089	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		318
H03F3/45094	13	{Folded cascode stages}	H03F3/45	H03F3/45		133
H03F3/45098	12	{PI types (H03F3/45125, H03F3/45152 take precedence)}	H03F3/45	H03F3/45		230
H03F3/45103	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		89
H03F3/45107	13	{Folded cascode stages}	H03F3/45	H03F3/45		11
H03F3/45112	12	{Complementary long tailed pairs having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		39
H03F3/45116	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		3
H03F3/45121	13	{Folded cascode stages}	H03F3/45	H03F3/45		27
H03F3/45125	12	{Complementary PI types having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		9
H03F3/4513	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45134	13	{Folded cascode stages}	H03F3/45	H03F3/45		6
H03F3/45139	12	{Complementary long tailed pairs having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		17
H03F3/45143	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		1
H03F3/45147	13	{Folded cascode stages}	H03F3/45	H03F3/45		4
H03F3/45152	12	{Complementary PI types having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		4
H03F3/45156	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45161	13	{Folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45165	12	{Complementary cross coupled types}	H03F3/45	H03F3/45		14
H03F3/4517	12	{Complementary non-cross coupled types}	H03F3/45	H03F3/45		24
H03F3/45174	12	{Mirror types}	H03F3/45	H03F3/45		91
H03F3/45179	11	{using MOSFET transistors as the active amplifying circuit (H03F3/45278 takes precedence)}	H03F3/45	H03F3/45		2386
H03F3/45183	12	{Long tailed pairs (H03F3/4521, H03F3/45237 take precedence)}	H03F3/45	H03F3/45		2637
H03F3/45188	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		776
H03F3/45192	13	{Folded cascode stages}	H03F3/45	H03F3/45		696
H03F3/45197	12	{Pl types (H03F3/45224, H03F3/45251 take precedence)}	H03F3/45	H03F3/45		486
H03F3/45201	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		71
H03F3/45206	13	{Folded cascode stages}	H03F3/45	H03F3/45		52
H03F3/4521	12	{Complementary long tailed pairs having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		295
H03F3/45215	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		24
H03F3/45219	13	{Folded cascode stages}	H03F3/45	H03F3/45		206
H03F3/45224	12	{Complementary Pl types having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		42
H03F3/45228	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		6
H03F3/45233	13	{Folded cascode stages}	H03F3/45	H03F3/45		14
H03F3/45237	12	{Complementary long tailed pairs having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		165
H03F3/45242	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		31
H03F3/45246	13	{Folded cascode stages}	H03F3/45	H03F3/45		26
H03F3/45251	12	{Complementary Pl types having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		10
H03F3/45255	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		1
H03F3/4526	13	{Folded cascode stages}	H03F3/45	H03F3/45		1
H03F3/45264	12	{Complementary cross coupled types}	H03F3/45	H03F3/45		83
H03F3/45269	12	{Complementary non-cross coupled types}	H03F3/45	H03F3/45		130
H03F3/45273	12	{Mirror types}	H03F3/45	H03F3/45		381
H03F3/45278	11	{using BiFET transistors as the active amplifying circuit}	H03F3/45	H03F3/45		59
H03F3/45282	12	{Long tailed pairs (H03F3/45309, H03F3/45336 take precedence)}	H03F3/45	H03F3/45		40
H03F3/45286	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		44
H03F3/45291	13	{Folded cascode stages}	H03F3/45	H03F3/45		37
H03F3/45295	12	{Pl types (H03F3/45322, H03F3/45349 take precedence)}	H03F3/45	H03F3/45		4
H03F3/453	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		4
H03F3/45304	13	{Folded cascode stages}	H03F3/45	H03F3/45		8
H03F3/45309	12	{Complementary long tailed pairs having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		1
H03F3/45313	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45318	13	{Folded cascode stages}	H03F3/45	H03F3/45		4
H03F3/45322	12	{Complementary Pl types having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		
H03F3/45327	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45331	13	{Folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45336	12	{Complementary long tailed pairs having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		1
H03F3/4534	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45345	13	{Folded cascode stages}	H03F3/45	H03F3/45		1
H03F3/45349	12	{Complementary Pl types having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		1
H03F3/45354	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45358	13	{Folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45363	12	{Complementary cross coupled types}	H03F3/45	H03F3/45		3
H03F3/45367	12	{Complementary non-cross coupled types}	H03F3/45	H03F3/45		6
H03F3/45372	12	{Mirror types}	H03F3/45	H03F3/45		14
H03F3/45376	11	{using junction FET transistors as the active amplifying circuit (H03F3/45278 takes precedence)}	H03F3/45	H03F3/45		99
H03F3/45381	12	{Long tailed pairs (H03F3/45408, H03F3/45434 take precedence)}	H03F3/45	H03F3/45		80
H03F3/45385	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		28
H03F3/4539	13	{Folded cascode stages}	H03F3/45	H03F3/45		12
H03F3/45394	12	{Pl types (H03F3/45421, H03F3/45448 take precedence)}	H03F3/45	H03F3/45		20
H03F3/45399	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		2
H03F3/45403	13	{Folded cascode stages}	H03F3/45	H03F3/45		4
H03F3/45408	12	{Complementary long tailed pairs having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		2
H03F3/45412	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45417	13	{Folded cascode stages}	H03F3/45	H03F3/45		5
H03F3/45421	12	{Complementary Pl types having parallel inputs and being supplied in parallel}	H03F3/45	H03F3/45		
H03F3/45426	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/4543	13	{Folded cascode stages}	H03F3/45	H03F3/45		1
H03F3/45434	12	{Complementary long tailed pairs having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		3
H03F3/45439	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		1
H03F3/45443	13	{Folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45448	12	{Complementary Pl types having parallel inputs and being supplied in series}	H03F3/45	H03F3/45		
H03F3/45452	13	{Non-folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45457	13	{Folded cascode stages}	H03F3/45	H03F3/45		
H03F3/45461	12	{Complementary cross coupled types}	H03F3/45	H03F3/45		2
H03F3/45466	12	{Complementary non-cross coupled types}	H03F3/45	H03F3/45		3
H03F3/4547	12	{Mirror types}	H03F3/45	H03F3/45		13
H03F3/45475	11	{using IC blocks as the active amplifying circuit}	H03F3/45	H03F3/45		5035
H03F3/45479	10	{characterised by the way of common mode signal rejection}	H03F3/45	H03F3/45		870
H03F3/45484	11	{in differential amplifiers with bipolar transistors as the active amplifying circuit (H03F3/4578 takes precedence)}	H03F3/45	H03F3/45		47
H03F3/45488	12	{by using feedback means (H03F3/4578 takes precedence)}	H03F3/45	H03F3/45		27
H03F3/45493	13	{Measuring at the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		10
H03F3/45497	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		23
H03F3/45502	14	{Controlling the common emitter circuit of the differential amplifier}	H03F3/45	H03F3/45		54
H03F3/45506	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		16
H03F3/45511	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		69
H03F3/45515	13	{Measuring at the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		4
H03F3/4552	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		3
H03F3/45524	14	{Controlling the common emitter circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45529	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		6
H03F3/45533	13	{Measuring at the common emitter circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45538	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		11
H03F3/45542	14	{Controlling the common emitter circuit of the differential amplifier}	H03F3/45	H03F3/45		6
H03F3/45547	12	{by using feedforward means (H03F3/45596 takes precedence)}	H03F3/45	H03F3/45		1
H03F3/45551	13	{Measuring at the input circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45556	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		13
H03F3/4556	14	{Controlling the common emitter circuit of the differential amplifier}	H03F3/45	H03F3/45		34
H03F3/45565	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		7
H03F3/45569	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		8
H03F3/45573	13	{Measuring at the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45578	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45582	13	{Measuring at the common emitter circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45587	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		11
H03F3/45591	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		4
H03F3/45596	12	{by offset reduction}	H03F3/45	H03F3/45		52
H03F3/456	13	{by using a feedback circuit}	H03F3/45	H03F3/45		47
H03F3/45605	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		11
H03F3/45609	13	{by using a feedforward circuit}	H03F3/45	H03F3/45		13
H03F3/45614	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		2
H03F3/45618	13	{by using balancing means}	H03F3/45	H03F3/45		32
H03F3/45623	14	{using switching means}	H03F3/45	H03F3/45		16
H03F3/45627	13	{by using cross switches}	H03F3/45	H03F3/45		5
H03F3/45632	11	{in differential amplifiers with FET transistors as the active amplifying circuit (H03F3/4578 takes precedence)}	H03F3/45	H03F3/45		262
H03F3/45636	12	{by using feedback means (H03F3/45744 takes precedence)}	H03F3/45	H03F3/45		158
H03F3/45641	13	{Measuring at the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		17
H03F3/45645	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		62
H03F3/4565	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		215
H03F3/45654	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		111
H03F3/45659	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		312
H03F3/45663	13	{Measuring at the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		10
H03F3/45668	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		15
H03F3/45672	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		25
H03F3/45677	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		30
H03F3/45681	13	{Measuring at the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		4
H03F3/45686	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		6
H03F3/4569	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		11
H03F3/45695	12	{by using feedforward means (H03F3/45744 takes precedence)}	H03F3/45	H03F3/45		19
H03F3/45699	13	{Measuring at the input circuit of the differential amplifier}	H03F3/45	H03F3/45		8
H03F3/45704	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		21
H03F3/45708	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		75
H03F3/45713	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		20
H03F3/45717	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		41
H03F3/45721	13	{Measuring at the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45726	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		9
H03F3/4573	13	{Measuring at the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		2
H03F3/45735	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		18
H03F3/45739	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		13
H03F3/45744	12	{by offset reduction}	H03F3/45	H03F3/45		190
H03F3/45748	13	{by using a feedback circuit}	H03F3/45	H03F3/45		95
H03F3/45753	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		123
H03F3/45757	13	{by using a feedforward circuit}	H03F3/45	H03F3/45		19
H03F3/45762	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		26
H03F3/45766	13	{by using balancing means}	H03F3/45	H03F3/45		76
H03F3/45771	14	{using switching means}	H03F3/45	H03F3/45		62
H03F3/45775	13	{by using cross switches}	H03F3/45	H03F3/45		46
H03F3/4578	11	{in differential amplifiers with BiFET transistors as the active amplifying circuit}	H03F3/45	H03F3/45		8
H03F3/45784	12	{by using feedback means (H03F3/45892 takes precedence)}	H03F3/45	H03F3/45		1
H03F3/45789	13	{Measuring at the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45793	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45798	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		5
H03F3/45802	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		9
H03F3/45807	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		8
H03F3/45811	13	{Measuring at the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45816	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/4582	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45825	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45829	13	{Measuring at the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45834	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45838	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45843	12	{by using feedforward means (H03F3/45892 takes precedence)}	H03F3/45	H03F3/45		1
H03F3/45847	13	{Measuring at the input circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45852	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45856	14	{Controlling the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/4586	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45865	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45869	13	{Measuring at the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45874	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45878	13	{Measuring at the common source circuit of the differential amplifier}	H03F3/45	H03F3/45		
H03F3/45883	14	{Controlling the active amplifying circuit of the differential amplifier}	H03F3/45	H03F3/45		1
H03F3/45887	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		2
H03F3/45892	12	{by offset reduction}	H03F3/45	H03F3/45		6
H03F3/45896	13	{by using a feedback circuit}	H03F3/45	H03F3/45		4
H03F3/45901	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		3
H03F3/45905	13	{by using a feedforward circuit}	H03F3/45	H03F3/45		
H03F3/4591	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		1
H03F3/45914	13	{by using balancing means}	H03F3/45	H03F3/45		2
H03F3/45919	14	{using switching means}	H03F3/45	H03F3/45		
H03F3/45923	13	{by using cross switches}	H03F3/45	H03F3/45		1
H03F3/45928	11	{using IC blocks as the active amplifying circuit}	H03F3/45	H03F3/45		242
H03F3/45932	12	{by using feedback means (H03F3/45968 takes precedence)}	H03F3/45	H03F3/45		68
H03F3/45937	13	{Measuring at the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		42
H03F3/45941	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		125
H03F3/45946	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		40
H03F3/4595	12	{by using feedforward means (H03F3/45968 takes precedence)}	H03F3/45	H03F3/45		13
H03F3/45955	13	{Measuring at the input circuit of the differential amplifier}	H03F3/45	H03F3/45		9
H03F3/45959	14	{Controlling the input circuit of the differential amplifier}	H03F3/45	H03F3/45		55
H03F3/45964	14	{Controlling the loading circuit of the differential amplifier}	H03F3/45	H03F3/45		9
H03F3/45968	12	{by offset reduction}	H03F3/45	H03F3/45		296
H03F3/45973	13	{by using a feedback circuit}	H03F3/45	H03F3/45		218
H03F3/45977	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		203
H03F3/45982	13	{by using a feedforward circuit}	H03F3/45	H03F3/45		38
H03F3/45986	14	{using switching means, e.g. sample and hold}	H03F3/45	H03F3/45		48
H03F3/45991	13	{by using balancing means}	H03F3/45	H03F3/45		65
H03F3/45995	14	{using switching means}	H03F3/45	H03F3/45		64
H03F3/46	8	Reflex amplifiers {(reflection amplifiers H03F3/608)}	H03F3/46	H03F3/46		23
H03F3/48	9	with tubes only	H03F3/48	H03F3/48		195
H03F3/50	8	Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower	H03F3/50	H03F3/50		355
H03F3/505	9	{with field-effect devices}	H03F3/50	H03F3/50		425
H03F3/52	9	with tubes only	H03F3/52	H03F3/52		282
H03F3/54	8	Amplifiers using transit-time effect in tubes or semiconductor devices (parametric amplifiers H03F7/00; solid state travelling-wave devices H10N70/10)	H03F3/54	H03F3/54		526
H03F3/55	9	with semiconductor devices only	H03F3/55	H03F3/55		56
H03F3/56	9	using klystrons	H03F3/56	H03F3/56		34
H03F3/58	9	using travelling-wave tubes	H03F3/58	H03F3/58		159
H03F3/60	8	Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators (H03F3/54 takes precedence)	H03F3/60	H03F3/60		566
H03F3/601	9	{using FET&apos;s, e.g. GaAs FET&apos;s (H03F3/607, H03F3/608 take precedence)}	H03F3/60	H03F3/60		318
H03F3/602	9	{Combinations of several amplifiers}	H03F3/60	H03F3/60		1285
H03F3/604	10	{using FET&apos;s}	H03F3/60	H03F3/60		350
H03F3/605	9	{Distributed amplifiers}	H03F3/60	H03F3/60		218
H03F3/607	10	{using FET&apos;s}	H03F3/60	H03F3/60		267
H03F3/608	9	{Reflection amplifiers, i.e. amplifiers using a one-port amplifying element and a multiport coupler (H03F7/00 takes precedence)}	H03F3/60	H03F3/60		72
H03F3/62	8	Two-way amplifiers	H03F3/62	H03F3/62		206
H03F3/64	9	with tubes only	H03F3/64	H03F3/64		52
H03F3/66	8	Amplifiers simultaneously generating oscillations of one frequency and amplifying signals of another frequency	H03F3/66	H03F3/66		83
H03F3/68	8	Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics {(power amplifiers using a combination of several semiconductor amplifiers H03F3/211; combinations of amplifiers using coupling networks with distributed constants H03F3/602)}	H03F3/68	H03F3/68		3348
H03F3/70	8	Charge amplifiers	H03F3/70	H03F3/70		379
H03F3/72	8	Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal	H03F3/72	H03F3/72		2802
H03F5/00	7	Amplifiers with both discharge tubes and semiconductor devices as amplifying elements	H03F5/00	H03F5/00		206
H03F7/00	7	Parametric amplifiers	H03F7/00	H03F7/00		229
H03F7/02	8	using variable-inductance element; using variable-permeability element	H03F7/02	H03F7/02		103
H03F7/04	8	using variable-capacitance element; using variable-permittivity element	H03F7/04	H03F7/04		384
H03F9/00	7	Magnetic amplifiers	H03F9/00	H03F9/00		202
H03F9/02	8	current-controlled, i.e. the load current flowing in both directions through a main coil	H03F9/02	H03F9/02		291
H03F9/04	8	voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits (H03F9/06 takes precedence)	H03F9/04	H03F9/04		367
H03F9/06	8	Control by voltage time integral, i.e. the load current flowing in only one direction through a main coil, whereby the main coil winding also can be used as a control winding, e.g. Ramey circuits	H03F9/06	H03F9/06		101
H03F11/00	7	Dielectric amplifiers	H03F11/00	H03F11/00		59
H03F13/00	7	Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier	H03F13/00	H03F13/00		256
H03F15/00	7	Amplifiers using galvano-magnetic effects not involving mechanical movement, e.g. using Hall effect	H03F15/00	H03F15/00		86
H03F17/00	7	Amplifiers using electroluminescent element or photocell	H03F17/00	H03F17/00		84
H03F19/00	7	Amplifiers using superconductivity effects	H03F19/00	H03F19/00		197
H03F99/00	7	Subject matter not provided for in other groups of this subclass	H03F99/00	H03F99/00		132
H03F2200/00	7	Indexing scheme relating to amplifiers	CPCONLY	H03F2200/00		3
H03F2200/03	8	the amplifier being designed for audio applications	CPCONLY	H03F2200/03		2294
H03F2200/06	8	A balun, i.e. balanced to or from unbalanced converter, being present at the input of an amplifier	CPCONLY	H03F2200/06		236
H03F2200/09	8	A balun, i.e. balanced to or from unbalanced converter, being present at the output of an amplifier	CPCONLY	H03F2200/09		334
H03F2200/102	8	A non-specified detector of a signal envelope being used in an amplifying circuit	CPCONLY	H03F2200/102		1254
H03F2200/105	8	A non-specified detector of the power of a signal being used in an amplifying circuit	CPCONLY	H03F2200/105		400
H03F2200/108	8	A coil being added in the drain circuit of a FET amplifier stage, e.g. for noise reducing purposes	CPCONLY	H03F2200/108		193
H03F2200/111	8	the amplifier being a dual or triple band amplifier, e.g. 900 and 1800 MHz, e.g. switched or not switched, simultaneously or not	CPCONLY	H03F2200/111		935
H03F2200/114	8	the amplifier comprising means for electro-magnetic interference [EMI] protection	CPCONLY	H03F2200/114		105
H03F2200/117	8	A coil being coupled in a feedback path of an amplifier stage	CPCONLY	H03F2200/117		35
H03F2200/12	8	A bias circuit for some stages being shown using transmission lines	CPCONLY	H03F2200/12		35
H03F2200/121	8	A transistor in common gate configuration being used in a feedback circuit of an amplifier stage	CPCONLY	H03F2200/121		18
H03F2200/123	8	A difference signal between an output and an input signal of an amplifier being coupled back at the input of the amplifier	CPCONLY	H03F2200/123		7
H03F2200/126	8	A diode being coupled in a feedback path of an amplifier stage, e.g. active or passive diode	CPCONLY	H03F2200/126		34
H03F2200/129	8	there being a feedback over the complete amplifier	CPCONLY	H03F2200/129		628
H03F2200/132	8	Hybrid coupler placed in a feedback circuit of an amplifier	CPCONLY	H03F2200/132		20
H03F2200/135	8	there being a feedback over one or more internal stages in the global amplifier	CPCONLY	H03F2200/135		147
H03F2200/138	8	the feedback circuit comprising a parallel resonance circuit	CPCONLY	H03F2200/138		14
H03F2200/141	8	the feedback circuit of the amplifier stage comprising a resistor and a capacitor in series, at least one of them being an active one	CPCONLY	H03F2200/141		37
H03F2200/144	8	the feedback circuit of the amplifier stage comprising a passive resistor and passive capacitor	CPCONLY	H03F2200/144		196
H03F2200/147	8	the feedback circuit comprising a series resonance circuit	CPCONLY	H03F2200/147		27
H03F2200/15	8	the supply or bias voltage or current at the drain side of a FET being continuously controlled by a controlling signal	CPCONLY	H03F2200/15		165
H03F2200/151	8	A source follower being used in a feedback circuit of an amplifier stage	CPCONLY	H03F2200/151		39
H03F2200/153	8	Feedback used to stabilise the amplifier	CPCONLY	H03F2200/153		237
H03F2200/156	8	One or more switches are realised in the feedback circuit of the amplifier stage	CPCONLY	H03F2200/156		154
H03F2200/159	8	the feedback circuit being closed during a switching time	CPCONLY	H03F2200/159		43
H03F2200/162	8	FETs are biased in the weak inversion region	CPCONLY	H03F2200/162		25
H03F2200/165	8	A filter circuit coupled to the input of an amplifier	CPCONLY	H03F2200/165		459
H03F2200/168	8	Two amplifying stages are coupled by means of a filter circuit	CPCONLY	H03F2200/168		167
H03F2200/171	8	A filter circuit coupled to the output of an amplifier	CPCONLY	H03F2200/171		620
H03F2200/174	8	Floating gate implemented in MOS technology	CPCONLY	H03F2200/174		11
H03F2200/177	8	Folded cascode realised by a folding coil	CPCONLY	H03F2200/177		1
H03F2200/18	8	the bias of the gate of a FET being controlled by a control signal	CPCONLY	H03F2200/18		790
H03F2200/181	8	A coil being added in the gate circuit of a FET amplifier stage, e.g. for noise reducing purposes	CPCONLY	H03F2200/181		46
H03F2200/183	8	the amplifier comprising a gated diode	CPCONLY	H03F2200/183		5
H03F2200/186	8	the ground, reference potential being controlled	CPCONLY	H03F2200/186		28
H03F2200/189	8	the ground, reference or shield potential difference between different chips being controlled	CPCONLY	H03F2200/189		19
H03F2200/192	8	A hybrid coupler being used at the input of an amplifier circuit	CPCONLY	H03F2200/192		286
H03F2200/195	8	A hybrid coupler being used as power measuring circuit at the input of an amplifier circuit	CPCONLY	H03F2200/195		31
H03F2200/198	8	A hybrid coupler being used as coupling circuit between stages of an amplifier circuit	CPCONLY	H03F2200/198		346
H03F2200/201	8	A hybrid coupler being used as power measuring inter-stage circuit between two stages of an amplifier circuit	CPCONLY	H03F2200/201		10
H03F2200/204	8	A hybrid coupler being used at the output of an amplifier circuit	CPCONLY	H03F2200/204		445
H03F2200/207	8	A hybrid coupler being used as power measuring circuit at the output of an amplifier circuit	CPCONLY	H03F2200/207		199
H03F2200/21	8	Bias resistors are added at the input of an amplifier	CPCONLY	H03F2200/21		133
H03F2200/211	8	the input of an amplifier can be attenuated by a continuously controlled transistor attenuator	CPCONLY	H03F2200/211		127
H03F2200/213	8	A variable capacitor being added in the input circuit, e.g. base, gate, of an amplifier stage	CPCONLY	H03F2200/213		113
H03F2200/216	8	A coil being added in the input circuit, e.g. base, gate, of an amplifier stage	CPCONLY	H03F2200/216		71
H03F2200/219	8	Follower transistors are added at the input of the amplifier, e.g. source or emitter followers	CPCONLY	H03F2200/219		36
H03F2200/222	8	A circuit being added at the input of an amplifier to adapt the input impedance of the amplifier	CPCONLY	H03F2200/222		1195
H03F2200/225	8	the input circuit of an amplifying stage comprising an LC-network	CPCONLY	H03F2200/225		122
H03F2200/228	8	A measuring circuit being coupled to the input of an amplifier	CPCONLY	H03F2200/228		110
H03F2200/231	8	the input of an amplifier can be switched on or off by a switch to amplify or not an input signal	CPCONLY	H03F2200/231		102
H03F2200/234	8	the input amplifying stage being one or more operational amplifiers	CPCONLY	H03F2200/234		178
H03F2200/237	8	A parallel resonance being added in series in the input circuit, e.g. base, gate, of an amplifier stage	CPCONLY	H03F2200/237		19
H03F2200/24	8	the supply or bias voltage or current at the source side of a FET being continuously controlled by a controlling signal	CPCONLY	H03F2200/24		55
H03F2200/241	8	A parallel resonance being added in shunt in the input circuit, e.g. base, gate, of an amplifier stage	CPCONLY	H03F2200/241		18
H03F2200/243	8	A series resonance being added in series in the input circuit, e.g. base, gate, of an amplifier stage	CPCONLY	H03F2200/243		35
H03F2200/246	8	A series resonance being added in shunt in the input circuit, e.g. base, gate, of an amplifier stage, e.g. as a trap	CPCONLY	H03F2200/246		34
H03F2200/249	8	A switch coupled in the input circuit of an amplifier being controlled by a circuit, e.g. feedback circuitry being controlling the switch	CPCONLY	H03F2200/249		81
H03F2200/252	8	Multiple switches coupled in the input circuit of an amplifier are controlled by a circuit, e.g. feedback circuitry being controlling the switch	CPCONLY	H03F2200/252		88
H03F2200/255	8	Amplifier input adaptation especially for transmission line coupling purposes, e.g. impedance adaptation	CPCONLY	H03F2200/255		174
H03F2200/258	8	the input of the amplifier has voltage limiting means	CPCONLY	H03F2200/258		42
H03F2200/261	8	Amplifier which being suitable for instrumentation applications	CPCONLY	H03F2200/261		831
H03F2200/264	8	An operational amplifier based integrator or transistor based integrator being used in an amplifying circuit	CPCONLY	H03F2200/264		143
H03F2200/267	8	A capacitor based passive circuit, e.g. filter, being used in an amplifying circuit	CPCONLY	H03F2200/267		245
H03F2200/27	8	A biasing circuit node being switched in an amplifier circuit	CPCONLY	H03F2200/27		198
H03F2200/271	8	the DC-isolation amplifier, e.g. chopper amplifier, modulation/demodulation amplifier, uses capacitive isolation means, e.g. capacitors	CPCONLY	H03F2200/271		96
H03F2200/273	8	the DC-isolation amplifier, e.g. chopper amplifier, modulation/demodulation amplifier, uses inductive isolation means, e.g. transformers	CPCONLY	H03F2200/273		37
H03F2200/276	8	the DC-isolation amplifier, e.g. chopper amplifier, modulation/demodulation amplifier, uses optical isolation means, e.g. optical couplers	CPCONLY	H03F2200/276		17
H03F2200/279	8	the level shifting stage between two amplifying stages being realised by an explicit differential amplifier	CPCONLY	H03F2200/279		6
H03F2200/282	8	the level shifting stage between two amplifying stages being realised by a diode	CPCONLY	H03F2200/282		12
H03F2200/285	8	the level shifting stage between two amplifying stages being realised by an emitter follower	CPCONLY	H03F2200/285		8
H03F2200/288	8	the level shifting stage between two amplifying stages being realised by a resistor or potentiometer	CPCONLY	H03F2200/288		6
H03F2200/291	8	the level shifting stage between two amplifying stages being realised by a source follower	CPCONLY	H03F2200/291		14
H03F2200/294	8	the amplifier being a low noise amplifier [LNA]	CPCONLY	H03F2200/294		3166
H03F2200/297	8	the loading circuit of an amplifying stage comprising a capacitor	CPCONLY	H03F2200/297		171
H03F2200/301	8	the loading circuit of an amplifying stage comprising a coil	CPCONLY	H03F2200/301		121
H03F2200/303	8	the loading circuit of an amplifying stage comprising a diode or diode coupled transistor	CPCONLY	H03F2200/303		21
H03F2200/306	8	the loading circuit of an amplifying stage being a parallel resonance circuit	CPCONLY	H03F2200/306		39
H03F2200/309	8	the loading circuit of an amplifying stage being a series resonance circuit	CPCONLY	H03F2200/309		26
H03F2200/31	8	the switching power stage comprising circuitry for emulating the behaviour of a bootstrap diode	CPCONLY	H03F2200/31		7
H03F2200/312	8	the loading circuit of an amplifying stage comprising one or more switches	CPCONLY	H03F2200/312		43
H03F2200/315	8	the loading circuit of an amplifying stage comprising a transmission line	CPCONLY	H03F2200/315		35
H03F2200/318	8	A matching circuit being used as coupling element between two amplifying stages	CPCONLY	H03F2200/318		478
H03F2200/321	8	Use of a microprocessor in an amplifier circuit or its control circuit	CPCONLY	H03F2200/321		334
H03F2200/324	8	An amplitude modulator or demodulator being used in the amplifier circuit	CPCONLY	H03F2200/324		105
H03F2200/327	8	Amplitude shift keying modulation being used in an amplifying circuit	CPCONLY	H03F2200/327		10
H03F2200/33	8	Bridge form coupled amplifiers; H-form coupled amplifiers	CPCONLY	H03F2200/33		52
H03F2200/331	8	Sigma delta modulation being used in an amplifying circuit	CPCONLY	H03F2200/331		521
H03F2200/333	8	A frequency modulator or demodulator being used in the amplifier circuit	CPCONLY	H03F2200/333		56
H03F2200/336	8	A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit	CPCONLY	H03F2200/336		637
H03F2200/339	8	Pulse amplitude modulation being used in an amplifying circuit	CPCONLY	H03F2200/339		28
H03F2200/342	8	Pulse code modulation being used in an amplifying circuit	CPCONLY	H03F2200/342		15
H03F2200/345	8	Pulse density modulation being used in an amplifying circuit	CPCONLY	H03F2200/345		33
H03F2200/348	8	Pulse frequency modulation being used in an amplifying circuit	CPCONLY	H03F2200/348		12
H03F2200/351	8	Pulse width modulation being used in an amplifying circuit	CPCONLY	H03F2200/351		821
H03F2200/354	8	the amplifier comprising MOS which are biased in the moderate inversion region	CPCONLY	H03F2200/354		2
H03F2200/357	8	the amplifier comprising MOS which are biased in the weak inversion region	CPCONLY	H03F2200/357		20
H03F2200/36	8	the amplifier comprising means for increasing the bandwidth	CPCONLY	H03F2200/36		620
H03F2200/361	8	Transistor with multiple collectors	CPCONLY	H03F2200/361		4
H03F2200/363	8	Transistor with multiple emitters	CPCONLY	H03F2200/363		7
H03F2200/366	8	Multiple MOSFETs are coupled in parallel	CPCONLY	H03F2200/366		108
H03F2200/369	8	A negative impedance circuit being added to an amplifier circuit	CPCONLY	H03F2200/369		38
H03F2200/372	8	Noise reduction and elimination in amplifier	CPCONLY	H03F2200/372		1716
H03F2200/375	8	Circuitry to compensate the offset being present in an amplifier	CPCONLY	H03F2200/375		451
H03F2200/378	8	A variable capacitor being added in the output circuit, e.g. collector, drain, of an amplifier stage	CPCONLY	H03F2200/378		163
H03F2200/381	8	An active variable resistor, e.g. controlled transistor, being coupled in the output circuit of an amplifier to control the output	CPCONLY	H03F2200/381		43
H03F2200/384	8	Amplifier without output filter, i.e. directly connected to the load	CPCONLY	H03F2200/384		26
H03F2200/387	8	A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier	CPCONLY	H03F2200/387		1687
H03F2200/39	8	Different band amplifiers are coupled in parallel to broadband the whole amplifying circuit	CPCONLY	H03F2200/39		93
H03F2200/391	8	the output circuit of an amplifying stage comprising an LC-network	CPCONLY	H03F2200/391		327
H03F2200/393	8	A measuring circuit being coupled to the output of an amplifier	CPCONLY	H03F2200/393		138
H03F2200/396	8	the output of an amplifier can be switched on or off by a switch to couple the output signal to a load	CPCONLY	H03F2200/396		41
H03F2200/399	8	A parallel resonance being added in shunt in the output circuit, e.g. base, gate, of an amplifier stage	CPCONLY	H03F2200/399		44
H03F2200/402	8	A series resonance being added in shunt in the output circuit, e.g. base, gate, of an amplifier stage	CPCONLY	H03F2200/402		49
H03F2200/405	8	the output amplifying stage of an amplifier comprising more than three power stages	CPCONLY	H03F2200/405		327
H03F2200/408	8	the output amplifying stage of an amplifier comprising three power stages	CPCONLY	H03F2200/408		483
H03F2200/411	8	the output amplifying stage of an amplifier comprising two power stages	CPCONLY	H03F2200/411		853
H03F2200/414	8	A switch being coupled in the output circuit of an amplifier to switch the output on/off	CPCONLY	H03F2200/414		131
H03F2200/417	8	A switch coupled in the output circuit of an amplifier being controlled by a circuit	CPCONLY	H03F2200/417		142
H03F2200/42	8	the input to the amplifier being made by capacitive coupling means	CPCONLY	H03F2200/42		131
H03F2200/421	8	Multiple switches coupled in the output circuit of an amplifier are controlled by a circuit	CPCONLY	H03F2200/421		145
H03F2200/423	8	Amplifier output adaptation especially for transmission line coupling purposes, e.g. impedance adaptation	CPCONLY	H03F2200/423		339
H03F2200/426	8	the amplifier comprising circuitry for protection against overload	CPCONLY	H03F2200/426		199
H03F2200/429	8	Two or more amplifiers or one amplifier with filters for different frequency bands are coupled in parallel at the input or output	CPCONLY	H03F2200/429		202
H03F2200/432	8	Two or more amplifiers of different type are coupled in parallel at the input or output, e.g. a class D and a linear amplifier, a class B and a class A amplifier	CPCONLY	H03F2200/432		291
H03F2200/435	8	A peak detection being used in a signal measuring circuit in a controlling circuit of an amplifier	CPCONLY	H03F2200/435		168
H03F2200/438	8	Separate feedback of amplitude and phase signals being present	CPCONLY	H03F2200/438		43
H03F2200/441	8	Protection of an amplifier being implemented by clamping means	CPCONLY	H03F2200/441		123
H03F2200/444	8	Diode used as protection means in an amplifier, e.g. as a limiter or as a switch	CPCONLY	H03F2200/444		224
H03F2200/447	8	the amplifier being protected to temperature influence	CPCONLY	H03F2200/447		909
H03F2200/45	8	the load of the amplifier being a capacitive element, e.g. CRT	CPCONLY	H03F2200/45		34
H03F2200/451	8	the amplifier being a radio frequency amplifier	CPCONLY	H03F2200/451		8407
H03F2200/453	8	Controlling being realised by adding a replica circuit or by using one among multiple identical circuits as a replica circuit	CPCONLY	H03F2200/453		356
H03F2200/456	8	A scaled replica of a transistor being present in an amplifier	CPCONLY	H03F2200/456		272
H03F2200/459	8	Ripple reduction circuitry being used in an amplifying circuit	CPCONLY	H03F2200/459		91
H03F2200/462	8	the current being sensed	CPCONLY	H03F2200/462		507
H03F2200/465	8	Power sensing	CPCONLY	H03F2200/465		209
H03F2200/468	8	the temperature being sensed	CPCONLY	H03F2200/468		276
H03F2200/471	8	the voltage being sensed	CPCONLY	H03F2200/471		323
H03F2200/474	8	A current mirror being used as sensor	CPCONLY	H03F2200/474		72
H03F2200/477	8	Paralleled transistors are used as sensors	CPCONLY	H03F2200/477		17
H03F2200/48	8	the output of the amplifier being coupled out by a capacitor	CPCONLY	H03F2200/48		127
H03F2200/481	8	A resistor being used as sensor	CPCONLY	H03F2200/481		111
H03F2200/483	8	A shunting switch being paralleled to the sensor	CPCONLY	H03F2200/483		7
H03F2200/486	8	the current in the load of an amplifying stage being sensed by a torus	CPCONLY	H03F2200/486		3
H03F2200/489	8	A coil being added in the source circuit of a common source stage, e.g. as degeneration means	CPCONLY	H03F2200/489		98
H03F2200/492	8	A coil being added in the source circuit of a transistor amplifier stage as degenerating element	CPCONLY	H03F2200/492		165
H03F2200/495	8	A parallel resonance circuit being added in the source circuit of a FET amplifier	CPCONLY	H03F2200/495		12
H03F2200/498	8	A resistor being added in the source circuit of a transistor amplifier stage as degenerating element	CPCONLY	H03F2200/498		61
H03F2200/501	8	A series resonance circuit being added in the source circuit of a FET amplifier	CPCONLY	H03F2200/501		5
H03F2200/504	8	the supply voltage or current being continuously controlled by a controlling signal, e.g. the controlling signal of a transistor implemented as variable resistor in a supply path for, an IC-block showed amplifier	CPCONLY	H03F2200/504		489
H03F2200/507	8	A switch being used for switching on or off a supply or supplying circuit in an IC-block amplifier circuit	CPCONLY	H03F2200/507		151
H03F2200/51	8	Capacitor in positive feedback circuit of an amplifier circuit to bootstrap a resistor	CPCONLY	H03F2200/51		8
H03F2200/511	8	Many discrete supply voltages or currents or voltage levels can be chosen by a control signal in an IC-block amplifier circuit	CPCONLY	H03F2200/511		227
H03F2200/513	8	the amplifier being made for low supply voltages	CPCONLY	H03F2200/513		215
H03F2200/516	8	Some amplifier stages of an amplifier use supply voltages of different value	CPCONLY	H03F2200/516		234
H03F2200/519	8	the bias or supply voltage or current of the drain side of a FET amplifier being controlled to be on or off by a switch	CPCONLY	H03F2200/519		22
H03F2200/522	8	the bias or supply voltage or current of the gate side of a FET amplifier being controlled to be on or off by a switch	CPCONLY	H03F2200/522		34
H03F2200/525	8	the bias or supply voltage or current of the source side of a FET amplifier being controlled to be on or off by a switch	CPCONLY	H03F2200/525		18
H03F2200/528	8	the temperature dependence being controlled by referencing to the band gap	CPCONLY	H03F2200/528		20
H03F2200/531	8	the temperature difference between different chips being controlled	CPCONLY	H03F2200/531		9
H03F2200/534	8	Transformer coupled at the input of an amplifier	CPCONLY	H03F2200/534		421
H03F2200/537	8	A transformer being used as coupling element between two amplifying stages	CPCONLY	H03F2200/537		512
H03F2200/54	8	Two or more capacitor coupled amplifier stages in cascade	CPCONLY	H03F2200/54		91
H03F2200/541	8	Transformer coupled at the output of an amplifier	CPCONLY	H03F2200/541		884
H03F2200/543	8	A transmission line being used as coupling element between two amplifying stages	CPCONLY	H03F2200/543		164
H03F2200/546	8	A tunable capacitance being present in an amplifier circuit	CPCONLY	H03F2200/546		62
H03F2200/549	8	the amplifier comprising means to emulate the vacuum tube behaviour	CPCONLY	H03F2200/549		43
H03F2200/552	8	the amplifier being made for video applications	CPCONLY	H03F2200/552		38
H03F2200/555	8	A voltage generating circuit being realised for biasing different circuit elements	CPCONLY	H03F2200/555		346
H03F2200/57	8	Separate feedback of real and complex signals being present	CPCONLY	H03F2200/57		86
H03F2200/61	8	the cascode amplifier has more than one common gate stage	CPCONLY	H03F2200/61		115
H03F2200/63	8	the amplifier being suitable for CATV applications	CPCONLY	H03F2200/63		70
H03F2200/66	8	Clipping circuitry being present in an amplifier, i.e. the shape of the signal being modified	CPCONLY	H03F2200/66		93
H03F2200/69	8	the amplifier stage being a common drain coupled MOSFET, i.e. source follower	CPCONLY	H03F2200/69		57
H03F2200/72	8	the amplifier stage being a common gate configuration MOSFET	CPCONLY	H03F2200/72		170
H03F2200/75	8	the amplifier stage being a common source configuration MOSFET	CPCONLY	H03F2200/75		264
H03F2200/78	8	A comparator being used in a controlling circuit of an amplifier	CPCONLY	H03F2200/78		605
H03F2200/81	8	Inputs or outputs are crossed during a first switching time, not crossed during a second switching time	CPCONLY	H03F2200/81		33
H03F2200/84	8	A cross coupling circuit being realized by current mirrors	CPCONLY	H03F2200/84		16
H03F2200/87	8	the cross coupling circuit being realised only by MOSFETs	CPCONLY	H03F2200/87		26
H03F2200/91	8	the amplifier has a current mode topology	CPCONLY	H03F2200/91		147
H03F2200/93	8	Two or more transistors are coupled in a Darlington composite transistor configuration, all transistors being of the same type	CPCONLY	H03F2200/93		35
H03F2200/96	8	Two or more complementary transistors are coupled in a Darlington composite transistor configuration	CPCONLY	H03F2200/96		8
H03F2200/99	8	A diode as rectifier being used as a detecting circuit in an amplifying circuit	CPCONLY	H03F2200/99		82
H03F2201/00	7	Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00	CPCONLY	H03F2201/00		
H03F2201/32	8	Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion	CPCONLY	H03F2201/32		8
H03F2201/3203	9	the amplifier comprising means for back off control in order to reduce distortion	CPCONLY	H03F2201/3203		26
H03F2201/3206	9	Multiple channels are combined and amplified by only one amplifier	CPCONLY	H03F2201/3206		40
H03F2201/3209	9	the amplifier comprising means for compensating memory effects	CPCONLY	H03F2201/3209		105
H03F2201/3212	9	Using a control circuit to adjust amplitude and phase of a signal in a signal path	CPCONLY	H03F2201/3212		235
H03F2201/3215	9	To increase the output power or efficiency	CPCONLY	H03F2201/3215		291
H03F2201/3218	9	the main amplifier or error amplifier being a feedforward amplifier	CPCONLY	H03F2201/3218		60
H03F2201/3221	9	Predistortion by overamplifying in a feedforward stage the distortion signal to have a combined main signal and "negative" distortion to form the predistorted signal for a further stage. so that after amplification in the further stage only the amplified main signal remains	CPCONLY	H03F2201/3221		32
H03F2201/3224	9	Predistortion being done for compensating memory effects	CPCONLY	H03F2201/3224		201
H03F2201/3227	9	Adaptive predistortion based on amplitude, envelope or power level feedback from the output of the main amplifier	CPCONLY	H03F2201/3227		134
H03F2201/3231	9	Adaptive predistortion using phase feedback from the output of the main amplifier	CPCONLY	H03F2201/3231		51
H03F2201/3233	9	Adaptive predistortion using lookup table, e.g. memory, RAM, ROM, LUT, to generate the predistortion	CPCONLY	H03F2201/3233		591
H03F2201/3236	9	A generated signal, e.g. a pulse or an inverted synchronous signal, being added to avoid certain conditions, e.g. clipping	CPCONLY	H03F2201/3236		25
H03F2203/00	7	Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00	CPCONLY	H03F2203/00		1
H03F2203/20	8	Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers	CPCONLY	H03F2203/20		2
H03F2203/21	9	with semiconductor devices only	CPCONLY	H03F2203/21		11
H03F2203/211	10	using a combination of several amplifiers	CPCONLY	H03F2203/211		18
H03F2203/21103	11	An impedance adaptation circuit being added at the input of a power amplifier stage	CPCONLY	H03F2203/21103		88
H03F2203/21106	11	An input signal being distributed in parallel over the inputs of a plurality of power amplifiers	CPCONLY	H03F2203/21106		321
H03F2203/21109	11	An input signal being distributed by switching to a plurality of paralleled power amplifiers	CPCONLY	H03F2203/21109		69
H03F2203/21112	11	A filter circuit being added at the input of a power amplifier stage	CPCONLY	H03F2203/21112		63
H03F2203/21115	11	An input signal dependant signal being measured by current measuring at the input of a power amplifier	CPCONLY	H03F2203/21115		3
H03F2203/21118	11	An input signal dependant signal being measured by power measuring at the input of a power amplifier	CPCONLY	H03F2203/21118		5
H03F2203/21121	11	An input signal dependant signal being measured by voltage measuring at the input of a power amplifier	CPCONLY	H03F2203/21121		5
H03F2203/21124	11	A parallel resonance circuit being coupled at the input of a power amplifier	CPCONLY	H03F2203/21124		4
H03F2203/21127	11	the input bias current of a power amplifier being controlled, e.g. by an active current source or a current mirror	CPCONLY	H03F2203/21127		50
H03F2203/21131	11	the input bias voltage of a power amplifier being controlled, e.g. by a potentiometer or an emitter follower	CPCONLY	H03F2203/21131		40
H03F2203/21133	11	A series resonance circuit being coupled at the input of a power amplifier	CPCONLY	H03F2203/21133		4
H03F2203/21136	11	An input signal of a power amplifier being on/off switched	CPCONLY	H03F2203/21136		41
H03F2203/21139	11	An impedance adaptation circuit being added at the output of a power amplifier stage	CPCONLY	H03F2203/21139		182
H03F2203/21142	11	Output signals of a plurality of power amplifiers are parallel combined to a common output	CPCONLY	H03F2203/21142		327
H03F2203/21145	11	Output signals are combined by switching a plurality of paralleled power amplifiers to a common output	CPCONLY	H03F2203/21145		80
H03F2203/21148	11	An output signal of a power amplifier being controlled by controlling current signal, e.g. by controlled current mirror	CPCONLY	H03F2203/21148		4
H03F2203/21151	11	An output signal of a power amplifier being controlled by controlling power signal, e.g. by an inductive coupler	CPCONLY	H03F2203/21151		13
H03F2203/21154	11	An output signal of a power amplifier being controlled by controlling voltage signal	CPCONLY	H03F2203/21154		5
H03F2203/21157	11	A filter circuit being added at the output of a power amplifier stage	CPCONLY	H03F2203/21157		133
H03F2203/21161	11	An output signal dependant signal being measured by current measuring at the output of a power amplifier	CPCONLY	H03F2203/21161		9
H03F2203/21163	11	An output signal dependant signal being measured by power measuring, e.g. by an inductive coupler, at the output of a power amplifier	CPCONLY	H03F2203/21163		13
H03F2203/21166	11	An output signal dependant signal being measured by voltage measuring at the output of a power amplifier	CPCONLY	H03F2203/21166		1
H03F2203/21169	11	A parallel resonance circuit being coupled at the output of a power amplifier	CPCONLY	H03F2203/21169		8
H03F2203/21172	11	A series resonance circuit being coupled at the output of a power amplifier	CPCONLY	H03F2203/21172		9
H03F2203/21175	11	An output signal of a power amplifier being on/off switched	CPCONLY	H03F2203/21175		42
H03F2203/21178	11	Power transistors are made by coupling a plurality of single transistors in parallel	CPCONLY	H03F2203/21178		66
H03F2203/21181	11	the supply current of a power amplifier being continuously controlled, e.g. by controlling current sources or resistors	CPCONLY	H03F2203/21181		14
H03F2203/21184	11	the supply current of a power amplifier being continuously measured, e.g. by a resistor, a current mirror, to produce a controlling signal	CPCONLY	H03F2203/21184		6
H03F2203/21187	11	the supply current of a power amplifier being measured discontinuously in time, e.g. by sampling, to produce a controlling signal	CPCONLY	H03F2203/21187		1
H03F2203/21191	11	the supply current of a power amplifier being switchable controlled, e.g. by choosing different current sources or resistors	CPCONLY	H03F2203/21191		10
H03F2203/21193	11	the supply voltage of a power amplifier being continuously controlled, e.g. by an active potentiometer	CPCONLY	H03F2203/21193		30
H03F2203/21196	11	the supply voltage of a power amplifier being switchable controlled	CPCONLY	H03F2203/21196		36
H03F2203/30	8	Indexing scheme relating to single-ended push-pull [SEPP]; Phase-splitters therefor	CPCONLY	H03F2203/30		1
H03F2203/30003	9	the SEPP amplifier stage comprising calibration possibility	CPCONLY	H03F2203/30003		5
H03F2203/30006	9	the push and the pull stages of the SEPP amplifier are both current mirrors	CPCONLY	H03F2203/30006		29
H03F2203/30009	9	the push and pull stages of the SEPP amplifier are both cascode current mirrors	CPCONLY	H03F2203/30009		13
H03F2203/30012	9	the two SEPP amplifying transistors are Darlington composite transistors	CPCONLY	H03F2203/30012		8
H03F2203/30015	9	An input signal dependent control signal controls the bias of an output stage in the SEPP	CPCONLY	H03F2203/30015		77
H03F2203/30018	9	A series coupled active resistor and capacitor are coupled in a feedback circuit of a SEPP amplifier	CPCONLY	H03F2203/30018		11
H03F2203/30021	9	A capacitor being coupled in a feedback circuit of a SEPP amplifier	CPCONLY	H03F2203/30021		37
H03F2203/30024	9	the SEPP bias current being controlled by a control signal from a feedback circuit	CPCONLY	H03F2203/30024		6
H03F2203/30027	9	the SEPP bias voltage being controlled by a control signal from a feedback circuit	CPCONLY	H03F2203/30027		12
H03F2203/30031	9	A resistor being coupled as feedback circuit in the SEPP amplifier	CPCONLY	H03F2203/30031		44
H03F2203/30033	9	A series coupled resistor and capacitor are coupled in a feedback circuit of a SEPP amplifier	CPCONLY	H03F2203/30033		30
H03F2203/30036	9	A feedback circuit to stabilise the SEPP being used	CPCONLY	H03F2203/30036		26
H03F2203/30039	9	the SEPP bias current being controlled by a control signal from a feedforward circuit	CPCONLY	H03F2203/30039		3
H03F2203/30042	9	the SEPP bias voltage being controlled by a control signal from a feedforward circuit	CPCONLY	H03F2203/30042		6
H03F2203/30045	9	the SEPP power transistors comprising measuring push or pull transistors to produce a controlling signal	CPCONLY	H03F2203/30045		5
H03F2203/30048	9	the SEPP amplifier has multiple SEPP outputs from paralleled output stages coupled in one or more outputs	CPCONLY	H03F2203/30048		17
H03F2203/30051	9	the SEPP amplifying transistors are composed of multiple coupled transistors	CPCONLY	H03F2203/30051		12
H03F2203/30054	9	the SEPP power transistors are realised as paralleled cascode coupled transistors, i.e. the push or the pull transistors	CPCONLY	H03F2203/30054		2
H03F2203/30057	9	the SEPP power transistors are realised as paralleled FETs, i.e. the push or the pull transistor	CPCONLY	H03F2203/30057		29
H03F2203/30061	9	One or more current mirrors are used as bias circuit or stages for the push or pull stages	CPCONLY	H03F2203/30061		14
H03F2203/30063	9	A differential amplifier being used in the bias circuit or in the control circuit of the SEPP-amplifier	CPCONLY	H03F2203/30063		16
H03F2203/30066	9	A optical element being used in the bias circuit of the SEPP-amplifier	CPCONLY	H03F2203/30066		5
H03F2203/30069	9	A SEPP amplifier with a reactive element in the bias circuit	CPCONLY	H03F2203/30069		4
H03F2203/30072	9	the SEPP has a power supply switchable by a controlling signal derived from the input signal	CPCONLY	H03F2203/30072		6
H03F2203/30075	9	the SEPP has a power supply switchable by a controlling signal derived from the output signal	CPCONLY	H03F2203/30075		1
H03F2203/30078	9	A resistor being added in the pull stage of the SEPP amplifier	CPCONLY	H03F2203/30078		65
H03F2203/30081	9	the pull transistor circuit comprising one or more capacitors	CPCONLY	H03F2203/30081		20
H03F2203/30084	9	the pull circuit of the SEPP amplifier being a cascode circuit	CPCONLY	H03F2203/30084		69
H03F2203/30087	9	Only the bias of the pull transistor of the SEPP being dynamically controlled by the input signal	CPCONLY	H03F2203/30087		11
H03F2203/30091	9	the pull side of the SEPP amplifier has an extra drive follower stage to control this pull side	CPCONLY	H03F2203/30091		5
H03F2203/30093	9	the pull side of the SEPP amplifier has an extra drive inverter stage to control this pull side	CPCONLY	H03F2203/30093		1
H03F2203/30096	9	An op amp being used as extra drive amp for the pull side of the SEPP	CPCONLY	H03F2203/30096		19
H03F2203/30099	9	the pull transistor being gated by a switching element	CPCONLY	H03F2203/30099		28
H03F2203/30102	9	the pull transistor has a measuring transistor for controlling purposes	CPCONLY	H03F2203/30102		2
H03F2203/30105	9	the pull transistor of the asymmetrically driven SEPP amplifier being a driven current mirror	CPCONLY	H03F2203/30105		17
H03F2203/30108	9	the pull transistor of the SEPP amplifier being a cascode current mirror	CPCONLY	H03F2203/30108		5
H03F2203/30111	9	A resistor being added in the push stage of the SEPP amplifier	CPCONLY	H03F2203/30111		64
H03F2203/30114	9	the push transistor circuit comprising one or more capacitors	CPCONLY	H03F2203/30114		21
H03F2203/30117	9	the push circuit of the SEPP amplifier being a cascode circuit	CPCONLY	H03F2203/30117		70
H03F2203/30121	9	Only the bias of the push transistor of the SEPP being dynamically controlled by the input signal	CPCONLY	H03F2203/30121		5
H03F2203/30123	9	the push side of the SEPP amplifier has an extra drive follower stage to control this push side	CPCONLY	H03F2203/30123		4
H03F2203/30126	9	the push side of the SEPP amplifier has an extra drive inverter stage to control this push side	CPCONLY	H03F2203/30126		1
H03F2203/30129	9	An op amp being used as extra drive amp for the push side of the SEPP	CPCONLY	H03F2203/30129		19
H03F2203/30132	9	the push transistor being gated by a switching element	CPCONLY	H03F2203/30132		27
H03F2203/30135	9	the push transistor has a measuring transistor for controlling purposes	CPCONLY	H03F2203/30135		
H03F2203/30138	9	the push transistor of the asymmetrically driven SEPP amplifier being a driven current mirror	CPCONLY	H03F2203/30138		18
H03F2203/30141	9	the push transistor of the SEPP amplifier being a cascode current mirror	CPCONLY	H03F2203/30141		5
H03F2203/30144	9	the SEPP comprising a reactive element in the amplifying circuits	CPCONLY	H03F2203/30144		19
H03F2203/30147	9	the current sink of the push driven, i.e. source driven SEPP amplifier being a current mirror	CPCONLY	H03F2203/30147		9
H03F2203/30151	9	the current sink of the push driven, i.e. source driven SEPP amplifier being a cascode current mirror	CPCONLY	H03F2203/30151		4
H03F2203/30153	9	the current source of the pull driven, i.e. sink driven SEPP amplifier being a current mirror	CPCONLY	H03F2203/30153		10
H03F2203/30156	9	the current source of the pull driven, i.e. sink driven SEPP amplifier being a cascode current mirror	CPCONLY	H03F2203/30156		4
H03F2203/45	8	Indexing scheme relating to differential amplifiers	CPCONLY	H03F2203/45		24
H03F2203/45002	9	the addition of two signals being made by addition of two currents by coupling the outputs of two current mirrors in parallel	CPCONLY	H03F2203/45002		9
H03F2203/45004	9	the addition of two signals being made by addition of two currents by coupling two current sources in parallel	CPCONLY	H03F2203/45004		8
H03F2203/45006	9	the addition of two signals being made by two emitter or source coupled followers	CPCONLY	H03F2203/45006		11
H03F2203/45008	9	the addition of two signals being made by a resistor addition circuit for producing the common mode signal	CPCONLY	H03F2203/45008		177
H03F2203/45011	9	the addition of two signals being made in a source degeneration circuit of a current mirror for producing the common mode signal	CPCONLY	H03F2203/45011		2
H03F2203/45012	9	the addition of two signals being made in a switched capacitor circuit for producing the common mode signal	CPCONLY	H03F2203/45012		21
H03F2203/45014	9	the addition of two signals being made in the tail circuit of a differential amplifier for producing the common mode signal	CPCONLY	H03F2203/45014		18
H03F2203/45016	9	the addition of two signals being made by paralleling two triode biased transistors for producing the common mode signal	CPCONLY	H03F2203/45016		1
H03F2203/45018	9	the differential amplifier amplifying transistors have added cross couplings	CPCONLY	H03F2203/45018		48
H03F2203/45021	9	One or more added diodes to the amplifying transistors in the differential amplifier	CPCONLY	H03F2203/45021		19
H03F2203/45022	9	One or more added resistors to the amplifying transistors in the differential amplifier	CPCONLY	H03F2203/45022		93
H03F2203/45024	9	the differential amplifier amplifying transistors are cascode coupled transistors	CPCONLY	H03F2203/45024		124
H03F2203/45026	9	One or more current sources are added to the amplifying transistors in the differential amplifier	CPCONLY	H03F2203/45026		85
H03F2203/45028	9	the differential amplifier amplifying transistors are folded cascode coupled transistors	CPCONLY	H03F2203/45028		168
H03F2203/45031	9	the differential amplifier amplifying transistors are compositions of multiple transistors	CPCONLY	H03F2203/45031		121
H03F2203/45032	9	the differential amplifier amplifying transistors are multiple paralleled transistors	CPCONLY	H03F2203/45032		49
H03F2203/45034	9	One or more added reactive elements, capacitive or inductive elements, to the amplifying transistors in the differential amplifier	CPCONLY	H03F2203/45034		46
H03F2203/45036	9	the differential amplifier amplifying transistors are single transistors	CPCONLY	H03F2203/45036		25
H03F2203/45038	9	One or more current sources are added or changed as balancing means to reduce the offset of the dif amp	CPCONLY	H03F2203/45038		22
H03F2203/45041	9	Fuses are blown to balance the dif amp to reduce the offset of the dif amp	CPCONLY	H03F2203/45041		2
H03F2203/45042	9	One or more resistors are added or changed as balancing to reduce the offset of the dif amp	CPCONLY	H03F2203/45042		15
H03F2203/45044	9	One or more switches are opened or closed to balance the dif amp to reduce the offset of the dif amp	CPCONLY	H03F2203/45044		43
H03F2203/45046	9	the base current of the amplifying transistors of a dif amp being compensated for providing a greater input impedance of the amplifier	CPCONLY	H03F2203/45046		4
H03F2203/45048	9	Calibrating and standardising a dif amp	CPCONLY	H03F2203/45048		168
H03F2203/45051	9	Two or more differential amplifiers cascade coupled	CPCONLY	H03F2203/45051		163
H03F2203/45052	9	the cascode stage of the cascode differential amplifier being controlled by a controlling signal, which controlling signal can also be the input signal	CPCONLY	H03F2203/45052		33
H03F2203/45054	9	the cascode stage of the cascode dif amp being a current mirror	CPCONLY	H03F2203/45054		33
H03F2203/45056	9	One or both transistors of the cascode stage of a differential amplifier being composed of more than one transistor	CPCONLY	H03F2203/45056		36
H03F2203/45058	9	the cascode stage of the differential amplifier comprising a reactive element	CPCONLY	H03F2203/45058		14
H03F2203/45061	9	the common mode reference signal being taken or deducted from the one or more inputs of the differential amplifier	CPCONLY	H03F2203/45061		13
H03F2203/45062	9	the common mode signal, e.g. voltage or current being added to the cascode stage of the cascode or folded cascode differential amplifier	CPCONLY	H03F2203/45062		24
H03F2203/45064	9	the resulting deducted common mode signal being added to the folding circuit of the folded differential amplifier	CPCONLY	H03F2203/45064		2
H03F2203/45066	9	the resulting deducted common mode signal being added at the one or more inputs of the differential amplifier	CPCONLY	H03F2203/45066		27
H03F2203/45068	9	the resulting deducted common mode signal being added at the one or more outputs of the differential amplifier	CPCONLY	H03F2203/45068		16
H03F2203/45071	9	the resulting deducted common mode signal being added at the substrate or body regions of the components of the differential amplifier	CPCONLY	H03F2203/45071		5
H03F2203/45072	9	the common mode voltage or current signal being added to the tail circuit of the differential amplifier	CPCONLY	H03F2203/45072		23
H03F2203/45074	9	A comparator circuit compares the common mode signal to a reference before controlling the differential amplifier or related stages	CPCONLY	H03F2203/45074		81
H03F2203/45076	9	the resulting deducted common mode signal being added to or controls the differential amplifier, and being a current signal	CPCONLY	H03F2203/45076		20
H03F2203/45078	9	the common mode signal being taken or deducted from the one or more inputs of the differential amplifier	CPCONLY	H03F2203/45078		48
H03F2203/45081	9	the common mode signal being level shifted before using it for controlling or adding	CPCONLY	H03F2203/45081		15
H03F2203/45082	9	the common mode signal being taken or deducted from the one or more outputs of the differential amplifier	CPCONLY	H03F2203/45082		141
H03F2203/45084	9	the common mode signal circuit comprising one or more inductive or capacitive elements, e.g. filter circuitry	CPCONLY	H03F2203/45084		34
H03F2203/45086	9	the common mode signal being taken or deducted from the tail circuit of the differential amplifier	CPCONLY	H03F2203/45086		5
H03F2203/45088	9	the resulting deducted common mode signal being added to or controls the differential amplifier, and being a voltage signal	CPCONLY	H03F2203/45088		35
H03F2203/45091	9	Two complementary type differential amplifiers are paralleled, e.g. one of the p-type and one of the n-type	CPCONLY	H03F2203/45091		50
H03F2203/45092	9	Two current sources bias one set of two common base transistors cascaded with two other common base transistors, the common base transistors being driven complementary	CPCONLY	H03F2203/45092		6
H03F2203/45094	9	the dif amp being realized by coupling the emitters respectively sources of two common collector respectively drain transistors of a first type to the emitters respectively sources of two common base respectively gate transistors of a second complementary type	CPCONLY	H03F2203/45094		12
H03F2203/45096	9	the difference of two signals being made by, e.g. combining two or more current mirrors, e.g. differential current mirror	CPCONLY	H03F2203/45096		28
H03F2203/45098	9	Two current mirrors coupled in a subtracting configuration	CPCONLY	H03F2203/45098		5
H03F2203/45101	9	Control of the DC level being present	CPCONLY	H03F2203/45101		158
H03F2203/45102	9	A diode being used as clamping element at the input of the dif amp	CPCONLY	H03F2203/45102		8
H03F2203/45104	9	A diode being used as clamping element at the loading circuit of the dif amp	CPCONLY	H03F2203/45104		2
H03F2203/45106	9	A diode being used as clamping element at the output of the dif amp	CPCONLY	H03F2203/45106		6
H03F2203/45108	9	A diode being used as level shifter between stages or in a follower in relation with a dif amp	CPCONLY	H03F2203/45108		6
H03F2203/45111	9	Two dif amps of the same type are used one dif amp for each input signal	CPCONLY	H03F2203/45111		13
H03F2203/45112	9	the biasing of the differential amplifier being controlled from the input or the output signal	CPCONLY	H03F2203/45112		130
H03F2203/45114	9	the differential amplifier contains another differential amplifier in its feedback circuit	CPCONLY	H03F2203/45114		48
H03F2203/45116	9	Feedback coupled to the input of the differential amplifier	CPCONLY	H03F2203/45116		406
H03F2203/45118	9	At least one reactive element being added to at least one feedback circuit of a dif amp	CPCONLY	H03F2203/45118		32
H03F2203/45121	9	A floating gate element being part of a dif amp	CPCONLY	H03F2203/45121		5
H03F2203/45122	9	the folded cascode stage of the folded cascode differential amplifier being controlled by a controlling signal	CPCONLY	H03F2203/45122		12
H03F2203/45124	9	the folded cascode stage of the folded cascode dif amp being a current mirror	CPCONLY	H03F2203/45124		17
H03F2203/45126	9	One or both transistors of the folded cascode stage of a folded cascode dif amp are composed of more than one transistor	CPCONLY	H03F2203/45126		15
H03F2203/45128	9	the folded cascode stage of the folded cascode dif amp contains a reactive element	CPCONLY	H03F2203/45128		3
H03F2203/45131	9	A follower being added between the dif amp and other explicit stages in the amplifying circuit	CPCONLY	H03F2203/45131		
H03F2203/45132	9	A source follower using multiple single follower stages cascaded in a composed follower being added to the dif amp	CPCONLY	H03F2203/45132		2
H03F2203/45134	9	the whole differential amplifier together with other coupled stages being fully differential realised	CPCONLY	H03F2203/45134		213
H03F2203/45136	9	One differential amplifier in IC-block form being shown	CPCONLY	H03F2203/45136		256
H03F2203/45138	9	Two or more differential amplifiers in IC-block form are combined, e.g. measuring amplifiers	CPCONLY	H03F2203/45138		825
H03F2203/45141	9	A cross coupled pair of transistors being added in the input circuit of a differential amplifier	CPCONLY	H03F2203/45141		15
H03F2203/45142	9	At least one diode being added at the input of a dif amp	CPCONLY	H03F2203/45142		13
H03F2203/45144	9	At least one follower being added at the input of a dif amp	CPCONLY	H03F2203/45144		16
H03F2203/45146	9	At least one op amp being added at the input of a dif amp	CPCONLY	H03F2203/45146		16
H03F2203/45148	9	At least one reactive element being added at the input of a dif amp	CPCONLY	H03F2203/45148		28
H03F2203/45151	9	At least one resistor being added at the input of a dif amp	CPCONLY	H03F2203/45151		134
H03F2203/45152	9	Balancing means being added at the input of a dif amp to reduce the offset of the dif amp	CPCONLY	H03F2203/45152		28
H03F2203/45154	9	the bias at the input of the amplifying transistors being controlled	CPCONLY	H03F2203/45154		66
H03F2203/45156	9	At least one capacitor being added at the input of a dif amp	CPCONLY	H03F2203/45156		116
H03F2203/45158	9	One or more diodes coupled at the inputs of a dif amp as clamping elements	CPCONLY	H03F2203/45158		8
H03F2203/45161	9	One or more diodes coupled at the inputs of a dif amp as level shifting circuit elements	CPCONLY	H03F2203/45161		3
H03F2203/45162	9	A parallel resonance circuit being added in the one or more input circuits of the dif amp	CPCONLY	H03F2203/45162		3
H03F2203/45164	9	A series resonance circuit being added in the one or more input circuits of the dif amp	CPCONLY	H03F2203/45164		
H03F2203/45166	9	Only one input of the dif amp being used for an input signal	CPCONLY	H03F2203/45166		89
H03F2203/45168	9	A dif amp being used as input stage to one or more other non-differential stages	CPCONLY	H03F2203/45168		20
H03F2203/45171	9	the input signal being switched to the one or more input terminals of the differential amplifier	CPCONLY	H03F2203/45171		37
H03F2203/45172	9	A transformer being added at the input of the dif amp	CPCONLY	H03F2203/45172		40
H03F2203/45174	9	the application of the differential amplifier being in an integrator circuit	CPCONLY	H03F2203/45174		47
H03F2203/45176	9	A cross coupling circuit, e.g. consisting of two cross coupled transistors, being added in the load circuit of the amplifying transistors of a differential amplifier	CPCONLY	H03F2203/45176		35
H03F2203/45178	9	the differential amplifier contains one or more extra resistors in the active load circuit	CPCONLY	H03F2203/45178		27
H03F2203/45181	9	Compensation of unbalanced loading in dif amps, e.g. unbalancing by connecting unequal circuits on both load circuits of the dif amp	CPCONLY	H03F2203/45181		4
H03F2203/45182	9	the differential amplifier contains one or more cascode current mirrors in the load	CPCONLY	H03F2203/45182		28
H03F2203/45184	9	the differential amplifier has one or more cascode current sources in the load	CPCONLY	H03F2203/45184		6
H03F2203/45186	9	the differential amplifier contains clamping components in the load circuit	CPCONLY	H03F2203/45186		14
H03F2203/45188	9	the differential amplifier contains one or more current sources in the load	CPCONLY	H03F2203/45188		70
H03F2203/45191	9	One or more diodes not belonging to a current mirror as loads of a dif amp	CPCONLY	H03F2203/45191		7
H03F2203/45192	9	the differential amplifier contains current mirrors comprising diodes which act as a load for the differential amplifier	CPCONLY	H03F2203/45192		17
H03F2203/45194	9	At least one active load circuit of the two load circuits in a differential amplifier being realised with a combination of more than one transistor	CPCONLY	H03F2203/45194		9
H03F2203/45196	9	A differential amplifier with one or more parallel coupled LC-circuits as load	CPCONLY	H03F2203/45196		4
H03F2203/45198	9	A parallel resonance circuit being added in the one or more load circuits of the dif amp	CPCONLY	H03F2203/45198		5
H03F2203/45201	9	the differential amplifier contains one or more reactive elements, i.e. capacitive or inductive elements, in the load	CPCONLY	H03F2203/45201		40
H03F2203/45202	9	the differential amplifier contains only resistors in the load	CPCONLY	H03F2203/45202		55
H03F2203/45204	9	A series resonance circuit being added in the one or more load circuits of the dif amp	CPCONLY	H03F2203/45204		1
H03F2203/45206	9	One or two switches are coupled in the loading circuit of the dif amp	CPCONLY	H03F2203/45206		21
H03F2203/45208	9	the dif amp being of the long tail pair type, one current source being coupled to the common emitter of the amplifying transistors	CPCONLY	H03F2203/45208		32
H03F2203/45211	9	the amplifying transistors have multiple collectors with a cross coupling	CPCONLY	H03F2203/45211		3
H03F2203/45212	9	the differential amplifier being designed to have a reduced offset	CPCONLY	H03F2203/45212		338
H03F2203/45214	9	Offset in a differential amplifier being reduced by control of the substrate voltage, the voltage being either fixed or variable	CPCONLY	H03F2203/45214		20
H03F2203/45216	9	A cross coupling circuit being added at the output terminals of the amplifying transistors of a differential amplifier	CPCONLY	H03F2203/45216		18
H03F2203/45218	9	Diode clamping means are present at the output of a differential amplifier	CPCONLY	H03F2203/45218		7
H03F2203/45221	9	the output signal being taken from the two complementary outputs of the differential amplifier	CPCONLY	H03F2203/45221		34
H03F2203/45222	9	the differential amplifier output being directly controlled by a feedback or feedforward circuit coupled at the output of the dif amp	CPCONLY	H03F2203/45222		29
H03F2203/45224	9	One output of the differential amplifier being taken into consideration	CPCONLY	H03F2203/45224		55
H03F2203/45226	9	the output signal being switched taken from the one or more output terminals of the differential amplifier	CPCONLY	H03F2203/45226		11
H03F2203/45228	9	A transformer being added at the output or the load circuit of the dif amp	CPCONLY	H03F2203/45228		65
H03F2203/45231	9	Two dif amps of the cascode type are paralleled at their input gates or bases	CPCONLY	H03F2203/45231		5
H03F2203/45232	9	Two dif amps of the folded cascode type are paralleled at their input gates or bases	CPCONLY	H03F2203/45232		9
H03F2203/45234	9	Two dif amps, one of them being of the cascade type and the other one of the folded cascade type, are paralleled at their input gates or bases	CPCONLY	H03F2203/45234		
H03F2203/45236	9	Two dif amps realised in MOS or JFET technology, one of them being of the p-channel type and the other one of the n-channel type, are coupled in parallel with their gates	CPCONLY	H03F2203/45236		31
H03F2203/45238	9	Two dif amps realised in FET technology, the dif amps being either both of the NMOS type or both of the PMOS type, are coupled in parallel with their gates and their drains	CPCONLY	H03F2203/45238		7
H03F2203/45241	9	Two dif amps realised in MOS or JFET technology, the dif amps being either both of the p-channel type or both of the n-channel type, are coupled in parallel with their gates	CPCONLY	H03F2203/45241		12
H03F2203/45242	9	Two dif amps are paralleled at their inputs, the dif amps being of different types, e.g. one long tail type and one complementary or pi type	CPCONLY	H03F2203/45242		4
H03F2203/45244	9	the differential amplifier contains one or more explicit bias circuits, e.g. to bias the tail current sources, to bias the load transistors	CPCONLY	H03F2203/45244		170
H03F2203/45246	9	the dif amp being biased in the subthreshold region	CPCONLY	H03F2203/45246		18
H03F2203/45248	9	the dif amp being designed for improving the slew rate	CPCONLY	H03F2203/45248		173
H03F2203/45251	9	the dif amp has a cross coupling circuit in the source circuit of the amplifying transistors	CPCONLY	H03F2203/45251		17
H03F2203/45252	9	Diodes are added in the source circuit of the amplifying FETs of the dif amp	CPCONLY	H03F2203/45252		1
H03F2203/45254	9	A parallel resonance circuit being added in the one or more source circuits of the amplifying FETs of the dif amp	CPCONLY	H03F2203/45254		1
H03F2203/45256	9	One or more reactive elements are added in the source circuit of the amplifying FETs of the dif amp	CPCONLY	H03F2203/45256		14
H03F2203/45258	9	Resistors are added in the source circuit of the amplifying FETs of the dif amp	CPCONLY	H03F2203/45258		30
H03F2203/45261	9	A series resonance circuit being added in the one or more source circuits of the amplifying FETs of the dif amp	CPCONLY	H03F2203/45261		1
H03F2203/45262	9	the two amplifying FETs, amplifying two complementary input signals, are not source coupled, i.e. no tail being present	CPCONLY	H03F2203/45262		2
H03F2203/45264	9	the dif amp comprising frequency or phase stabilisation means	CPCONLY	H03F2203/45264		43
H03F2203/45266	9	the stage cascaded to the dif amp being an asymmetrical follower stage	CPCONLY	H03F2203/45266		4
H03F2203/45268	9	A common gate stage being coupled at the one or more outputs of the dif amp	CPCONLY	H03F2203/45268		6
H03F2203/45271	9	the output current being reduced by a transistor which being controlled by the input signal to sink current	CPCONLY	H03F2203/45271		10
H03F2203/45272	9	the output current being increased by a transistor which being controlled by the input signal to source current	CPCONLY	H03F2203/45272		6
H03F2203/45274	9	Level shifting stages are added to the differential amplifier at a position other than the one or more inputs of the dif amp	CPCONLY	H03F2203/45274		21
H03F2203/45276	9	An op amp as stage being coupled to the output of a dif amp	CPCONLY	H03F2203/45276		9
H03F2203/45278	9	Two SEPP stages are added to the differential amplifier, the outputs of the two SEPP stages being the two outputs of the whole amplifier	CPCONLY	H03F2203/45278		13
H03F2203/45281	9	One SEPP output stage being added to the differential amplifier	CPCONLY	H03F2203/45281		24
H03F2203/45282	9	the differential amplifier being coupled to a symmetrical follower output stage	CPCONLY	H03F2203/45282		2
H03F2203/45284	9	Sensing the temperature dependence by a temperature dependant sensor, e.g. a resistor, a diode	CPCONLY	H03F2203/45284		14
H03F2203/45286	9	the temperature dependence of a differential amplifier being controlled	CPCONLY	H03F2203/45286		45
H03F2203/45288	9	Differential amplifier with circuit arrangements to enhance the transconductance	CPCONLY	H03F2203/45288		228
H03F2203/45291	9	the active amplifying circuit [AAC] comprising balancing means	CPCONLY	H03F2203/45291		23
H03F2203/45292	9	the AAC comprising biasing means controlled by the signal	CPCONLY	H03F2203/45292		87
H03F2203/45294	9	the AAC comprising biasing means to stabilise itself	CPCONLY	H03F2203/45294		17
H03F2203/45296	9	the AAC comprising one or more discrete capacitive elements, e.g. a transistor coupled as capacitor	CPCONLY	H03F2203/45296		71
H03F2203/45298	9	the AAC comprising one or more combinations of discrete capacitor and resistor elements, e.g. active elements using a transistor as a capacitor or as a resistor	CPCONLY	H03F2203/45298		31
H03F2203/45301	9	there are multiple cascaded folded or not folded common gate stages of a cascode dif amp	CPCONLY	H03F2203/45301		46
H03F2203/45302	9	the common gate stage of a cascode dif amp being controlled	CPCONLY	H03F2203/45302		144
H03F2203/45304	9	the common gate stage of a BIFET cascode dif amp being implemented fully by FETs	CPCONLY	H03F2203/45304		30
H03F2203/45306	9	the common gate stage implemented as dif amp eventually for cascode dif amp	CPCONLY	H03F2203/45306		108
H03F2203/45308	9	the common gate stage of a cascode dif amp being implemented as one mirror circuit	CPCONLY	H03F2203/45308		15
H03F2203/45311	9	the common gate stage of a cascode dif amp being implemented by multiple transistors	CPCONLY	H03F2203/45311		84
H03F2203/45312	9	there being only one common gate stage of a cascode dif amp	CPCONLY	H03F2203/45312		5
H03F2203/45314	9	the AAC comprising clamping means, e.g. diodes	CPCONLY	H03F2203/45314		16
H03F2203/45316	9	the AAC comprising one or more discrete inductive elements or coils	CPCONLY	H03F2203/45316		50
H03F2203/45318	9	the AAC comprising a cross coupling circuit, e.g. two extra transistors cross coupled	CPCONLY	H03F2203/45318		329
H03F2203/45321	9	the common source stage of a BIFET cascode dif amp being implemented fully by FETs	CPCONLY	H03F2203/45321		1
H03F2203/45322	9	One or more current sources are added to the AAC	CPCONLY	H03F2203/45322		33
H03F2203/45324	9	the AAC comprising a Darlington transistor circuit	CPCONLY	H03F2203/45324		8
H03F2203/45326	9	the AAC comprising one or more extra diodes, e.g. as level shifter, as diode coupled transistors	CPCONLY	H03F2203/45326		18
H03F2203/45328	9	the AAC comprising one diode coupled AAC-transistor in a follower combination with the other AAC circuit part	CPCONLY	H03F2203/45328		10
H03F2203/45331	9	the AAC comprising one or more diodes coupled as a shunt between the AAC-transistors in the AAC	CPCONLY	H03F2203/45331		5
H03F2203/45332	9	the AAC comprising one or more capacitors as feedback circuit elements	CPCONLY	H03F2203/45332		62
H03F2203/45334	9	the AAC comprising one or more dif amps as feedback circuit elements	CPCONLY	H03F2203/45334		6
H03F2203/45336	9	the AAC comprising one or more resistors as feedback circuit elements	CPCONLY	H03F2203/45336		47
H03F2203/45338	9	the AAC comprising one or more series circuits of a resistor and a capacitor as feedback circuit elements	CPCONLY	H03F2203/45338		14
H03F2203/45341	9	the AAC comprising controlled floating gates	CPCONLY	H03F2203/45341		17
H03F2203/45342	9	the AAC comprising control means on a back gate of the AAC	CPCONLY	H03F2203/45342		85
H03F2203/45344	9	At least one of the AAC sub-circuits being a current mirror	CPCONLY	H03F2203/45344		42
H03F2203/45346	9	the AAC comprising one or more FETs with multiple drains	CPCONLY	H03F2203/45346		15
H03F2203/45348	9	the AAC comprising one or more FETs with multiple gates	CPCONLY	H03F2203/45348		3
H03F2203/45351	9	the AAC comprising one or more FETs with multiple sources	CPCONLY	H03F2203/45351		7
H03F2203/45352	9	the AAC comprising a combination of a plurality of transistors, e.g. Darlington coupled transistors	CPCONLY	H03F2203/45352		254
H03F2203/45354	9	the AAC comprising offset means	CPCONLY	H03F2203/45354		80
H03F2203/45356	9	the AAC comprising one or more op-amps, e.g. IC-blocks	CPCONLY	H03F2203/45356		134
H03F2203/45358	9	the AAC comprising multiple transistors parallel coupled at their sources and drains only, e.g. in a cascode dif amp, only those forming the composite common source transistor	CPCONLY	H03F2203/45358		22
H03F2203/45361	9	the AAC comprising multiple transistors parallel coupled at their drains only, e.g. in a cascode dif amp, only those forming the composite common source transistor	CPCONLY	H03F2203/45361		34
H03F2203/45362	9	the AAC comprising multiple transistors parallel coupled at their gates and drains only, e.g. in a cascode dif amp, only those forming the composite common source transistor	CPCONLY	H03F2203/45362		68
H03F2203/45364	9	the AAC comprising multiple transistors parallel coupled at their gates and sources only, e.g. in a cascode dif amp, only those forming the composite common source transistor	CPCONLY	H03F2203/45364		65
H03F2203/45366	9	the AAC comprising multiple transistors parallel coupled at their gates only, e.g. in a cascode dif amp, only those forming the composite common source transistor	CPCONLY	H03F2203/45366		260
H03F2203/45368	9	the AAC comprising multiple transistors parallel coupled at their sources only, e.g. in a cascode dif amp, only those forming the composite common source transistor	CPCONLY	H03F2203/45368		11
H03F2203/45371	9	the AAC comprising parallel coupled multiple transistors at their source and gate and drain or at their base and emitter and collector, e.g. in a cascode dif amp, only those forming the composite common source transistor or the composite common emitter transistor respectively	CPCONLY	H03F2203/45371		129
H03F2203/45372	9	the AAC comprising one or more potentiometers	CPCONLY	H03F2203/45372		25
H03F2203/45374	9	the AAC comprising one or more discrete resistors	CPCONLY	H03F2203/45374		98
H03F2203/45376	9	the AAC comprising one or more discrete resistors as shunts between collectors or drains	CPCONLY	H03F2203/45376		15
H03F2203/45378	9	the AAC comprising saturation or cutoff avoiding means, e.g. as a feedback circuit	CPCONLY	H03F2203/45378		5
H03F2203/45381	9	the AAC comprising multiple transistors coupled in shunt	CPCONLY	H03F2203/45381		4
H03F2203/45382	9	the AAC comprising common gate stages in the source circuit of the AAC before the common source coupling	CPCONLY	H03F2203/45382		11
H03F2203/45384	9	the AAC comprising common gate stages in the source circuit of the AAC before the common source coupling in which the common gate stage being controlled	CPCONLY	H03F2203/45384		23
H03F2203/45386	9	the AAC comprising one or more coils in the source circuit	CPCONLY	H03F2203/45386		97
H03F2203/45388	9	the AAC comprising diodes in the source circuit of the AAC before the common source coupling	CPCONLY	H03F2203/45388		12
H03F2203/45391	9	the AAC comprising potentiometers in the source circuit of the AAC before the common source coupling	CPCONLY	H03F2203/45391		16
H03F2203/45392	9	the AAC comprising resistors in the source circuit of the AAC before the common source coupling	CPCONLY	H03F2203/45392		217
H03F2203/45394	9	the AAC of the dif amp comprising FETs whose sources are not coupled, i.e. the AAC being a pseudo-differential amplifier	CPCONLY	H03F2203/45394		260
H03F2203/45396	9	the AAC comprising one or more switches	CPCONLY	H03F2203/45396		140
H03F2203/45398	9	the AAC comprising a voltage generating circuit as bias circuit for the AAC	CPCONLY	H03F2203/45398		68
H03F2203/45401	9	the common mode controlling loop [CMCL] comprising a transistor resistor addition circuit	CPCONLY	H03F2203/45401		16
H03F2203/45402	9	the CMCL comprising a buffered addition circuit, i.e. the signals are buffered before addition, e.g. by a follower	CPCONLY	H03F2203/45402		47
H03F2203/45404	9	the CMCL comprising capacitors containing, not in parallel with the resistors, an addition circuit	CPCONLY	H03F2203/45404		38
H03F2203/45406	9	the CMCL comprising a common source node of a long tail FET pair as an addition circuit	CPCONLY	H03F2203/45406		67
H03F2203/45408	9	the CMCL comprising a short circuited differential output of a dif amp as an addition circuit	CPCONLY	H03F2203/45408		28
H03F2203/45411	9	the CMCL comprising a diode addition circuit, e.g. using diode connected transistors	CPCONLY	H03F2203/45411		3
H03F2203/45412	9	the CMCL comprising a folding circuit as addition circuit	CPCONLY	H03F2203/45412		2
H03F2203/45414	9	the CMCL comprising a current mirror addition circuit	CPCONLY	H03F2203/45414		5
H03F2203/45416	9	the CMCL comprising no addition of the dif signals to produce a common mode signal	CPCONLY	H03F2203/45416		7
H03F2203/45418	9	the CMCL comprising a resistor addition circuit	CPCONLY	H03F2203/45418		315
H03F2203/45421	9	the CMCL comprising a switched capacitor addition circuit	CPCONLY	H03F2203/45421		38
H03F2203/45422	9	the CMCL comprising one or more capacitors not as integrating capacitor, e.g. for stability purposes	CPCONLY	H03F2203/45422		21
H03F2203/45424	9	the CMCL comprising a comparator circuit	CPCONLY	H03F2203/45424		292
H03F2203/45426	9	the CMCL comprising a comparator circuit with extra buffering means before comparison of the common mode signal, e.g. by a follower	CPCONLY	H03F2203/45426		12
H03F2203/45428	9	the CMCL comprising a comparator circuit using a four inputs dif amp	CPCONLY	H03F2203/45428		13
H03F2203/45431	9	the CMCL output control signal being a current signal	CPCONLY	H03F2203/45431		55
H03F2203/45432	9	the CMCL output control signal being a current signal and being buffered before used to control	CPCONLY	H03F2203/45432		7
H03F2203/45434	9	the CMCL output control signal being a voltage signal	CPCONLY	H03F2203/45434		61
H03F2203/45436	9	the CMCL output control signal being a voltage signal and being buffered before used to control	CPCONLY	H03F2203/45436		5
H03F2203/45438	9	the CMCL uses digital signals	CPCONLY	H03F2203/45438		26
H03F2203/45441	9	the CMCL comprising an integrating circuit	CPCONLY	H03F2203/45441		21
H03F2203/45442	9	the CMCL comprising multiple loops for the same stage or for different stages in the amplifier	CPCONLY	H03F2203/45442		9
H03F2203/45444	9	the CMCL comprising a sample and hold circuit	CPCONLY	H03F2203/45444		14
H03F2203/45446	9	there are two or more CMCLs	CPCONLY	H03F2203/45446		18
H03F2203/45448	9	the common source circuit [CSC] comprising an addition circuit made by mirrors	CPCONLY	H03F2203/45448		3
H03F2203/45451	9	the CSC comprising an addition circuit made by added current sources	CPCONLY	H03F2203/45451		8
H03F2203/45452	9	the CSC comprising balancing means	CPCONLY	H03F2203/45452		1
H03F2203/45454	9	the CSC comprising biasing means controlled by the input signal	CPCONLY	H03F2203/45454		123
H03F2203/45456	9	the CSC comprising bias stabilisation means, e.g. DC-level stability, positive or negative temperature coefficient dependent control	CPCONLY	H03F2203/45456		43
H03F2203/45458	9	the CSC comprising one or more capacitors	CPCONLY	H03F2203/45458		95
H03F2203/45461	9	the CSC comprising one or more switched capacitors	CPCONLY	H03F2203/45461		22
H03F2203/45462	9	the CSC comprising a cascode circuit	CPCONLY	H03F2203/45462		35
H03F2203/45464	9	the CSC comprising one or more coils	CPCONLY	H03F2203/45464		70
H03F2203/45466	9	the CSC being controlled, e.g. by a signal derived from a non specified place in the dif amp circuit	CPCONLY	H03F2203/45466		289
H03F2203/45468	9	the CSC comprising a cross coupling circuit, e.g. comprising two cross-coupled transistors	CPCONLY	H03F2203/45468		20
H03F2203/45471	9	the CSC comprising one or more extra current sources	CPCONLY	H03F2203/45471		123
H03F2203/45472	9	the CSC comprising one or more diodes	CPCONLY	H03F2203/45472		22
H03F2203/45474	9	the CSC comprising controlled one or more floating gates	CPCONLY	H03F2203/45474		4
H03F2203/45476	9	the CSC comprising a mirror circuit	CPCONLY	H03F2203/45476		77
H03F2203/45478	9	the CSC comprising a cascode mirror circuit	CPCONLY	H03F2203/45478		13
H03F2203/45481	9	the CSC comprising only a direct connection to the supply voltage, no other components being present	CPCONLY	H03F2203/45481		179
H03F2203/45482	9	the CSC comprising offset means	CPCONLY	H03F2203/45482		42
H03F2203/45484	9	the CSC comprising one or more op-amps	CPCONLY	H03F2203/45484		13
H03F2203/45486	9	the CSC comprising two or more paralleled transistors as current source	CPCONLY	H03F2203/45486		11
H03F2203/45488	9	the CSC being a pi circuit and a capacitor being used at the place of the resistor	CPCONLY	H03F2203/45488		53
H03F2203/45491	9	the CSC being a pi circuit and the resistor being implemented by one or more transistors	CPCONLY	H03F2203/45491		8
H03F2203/45492	9	the CSC being a pi circuit and the resistor being implemented by one or more controlled transistors	CPCONLY	H03F2203/45492		60
H03F2203/45494	9	the CSC comprising one or more potentiometers	CPCONLY	H03F2203/45494		70
H03F2203/45496	9	the CSC comprising one or more extra resistors	CPCONLY	H03F2203/45496		110
H03F2203/45498	9	the CSC comprising only resistors	CPCONLY	H03F2203/45498		63
H03F2203/45501	9	the CSC comprising a L-C parallel resonance circuit	CPCONLY	H03F2203/45501		11
H03F2203/45502	9	the CSC comprising a L-C series resonance circuit	CPCONLY	H03F2203/45502		11
H03F2203/45504	9	the CSC comprising more than one switch	CPCONLY	H03F2203/45504		89
H03F2203/45506	9	the CSC comprising only one switch	CPCONLY	H03F2203/45506		116
H03F2203/45508	9	the CSC comprising a voltage generating circuit as bias circuit for the CSC	CPCONLY	H03F2203/45508		220
H03F2203/45511	9	the feedback circuit [FBC] comprising one or more transistor stages, e.g. cascaded stages of the dif amp, and being coupled between the loading circuit [LC] and the input circuit [IC]	CPCONLY	H03F2203/45511		112
H03F2203/45512	9	the FBC comprising one or more capacitors, not being switched capacitors, and being coupled between the LC and the IC	CPCONLY	H03F2203/45512		483
H03F2203/45514	9	the FBC comprising one or more switched capacitors, and being coupled between the LC and the IC	CPCONLY	H03F2203/45514		305
H03F2203/45516	9	the FBC comprising a coil and being coupled between the LC and the IC	CPCONLY	H03F2203/45516		11
H03F2203/45518	9	the FBC comprising one or more diodes and being coupled between the LC and the IC	CPCONLY	H03F2203/45518		52
H03F2203/45521	9	the FBC comprising op amp stages, e.g. cascaded stages of the dif amp and being coupled between the LC and the IC	CPCONLY	H03F2203/45521		135
H03F2203/45522	9	the FBC comprising one or more potentiometers	CPCONLY	H03F2203/45522		201
H03F2203/45524	9	the FBC comprising one or more active resistors and being coupled between the LC and the IC	CPCONLY	H03F2203/45524		48
H03F2203/45526	9	the FBC comprising a resistor-capacitor combination and being coupled between the LC and the IC	CPCONLY	H03F2203/45526		475
H03F2203/45528	9	the FBC comprising one or more passive resistors and being coupled between the LC and the IC	CPCONLY	H03F2203/45528		829
H03F2203/45531	9	the FBC comprising a parallel resonance circuit and being coupled between the LC and the IC	CPCONLY	H03F2203/45531		5
H03F2203/45532	9	the FBC comprising a series resonance circuit and being coupled between the LC and the IC	CPCONLY	H03F2203/45532		7
H03F2203/45534	9	the FBC comprising multiple switches and being coupled between the LC and the IC	CPCONLY	H03F2203/45534		184
H03F2203/45536	9	the FBC comprising a switch and being coupled between the LC and the IC	CPCONLY	H03F2203/45536		149
H03F2203/45538	9	the IC comprising balancing means, e.g. trimming means	CPCONLY	H03F2203/45538		34
H03F2203/45541	9	the IC comprising dynamic biasing means, i.e. controlled by the input signal	CPCONLY	H03F2203/45541		34
H03F2203/45542	9	the IC comprising bias stabilisation means, e.g. DC level stabilisation, and temperature coefficient dependent control, e.g. by DC level shifting	CPCONLY	H03F2203/45542		36
H03F2203/45544	9	the IC comprising one or more capacitors, e.g. coupling capacitors	CPCONLY	H03F2203/45544		348
H03F2203/45546	9	the IC comprising one or more capacitors feedback coupled to the IC	CPCONLY	H03F2203/45546		54
H03F2203/45548	9	the IC comprising one or more capacitors as shunts to earth or as short circuit between inputs	CPCONLY	H03F2203/45548		90
H03F2203/45551	9	the IC comprising one or more switched capacitors	CPCONLY	H03F2203/45551		215
H03F2203/45552	9	the IC comprising clamping means, e.g. diodes	CPCONLY	H03F2203/45552		42
H03F2203/45554	9	the IC comprising one or more coils	CPCONLY	H03F2203/45554		75
H03F2203/45556	9	the IC comprising a common gate stage as input stage to the dif amp	CPCONLY	H03F2203/45556		9
H03F2203/45558	9	the IC being coupled at the sources of the source coupled pair	CPCONLY	H03F2203/45558		4
H03F2203/45561	9	the IC being controlled, e.g. by a signal derived from a non specified place in the dif amp circuit	CPCONLY	H03F2203/45561		28
H03F2203/45562	9	the IC comprising a cross coupling circuit, e.g. comprising two cross-coupled transistors	CPCONLY	H03F2203/45562		95
H03F2203/45564	9	the IC comprising one or more extra current sources	CPCONLY	H03F2203/45564		38
H03F2203/45566	9	the IC comprising one or more dif stages in cascade with the dif amp	CPCONLY	H03F2203/45566		35
H03F2203/45568	9	the IC comprising one or more diodes as shunt to the input leads	CPCONLY	H03F2203/45568		38
H03F2203/45571	9	the IC comprising two diodes, e.g. Gilbert circuit	CPCONLY	H03F2203/45571		31
H03F2203/45572	9	the IC comprising one or more Zener diodes to the input leads	CPCONLY	H03F2203/45572		7
H03F2203/45574	9	the IC comprising four or more input leads connected to four or more AAC-transistors	CPCONLY	H03F2203/45574		60
H03F2203/45576	9	the IC comprising input impedance adapting or controlling means	CPCONLY	H03F2203/45576		58
H03F2203/45578	9	the IC comprising one or more diodes as level shifters	CPCONLY	H03F2203/45578		13
H03F2203/45581	9	the IC comprising one or more resistors as level shifters	CPCONLY	H03F2203/45581		19
H03F2203/45582	9	the IC comprising one or more voltage sources as level shifters	CPCONLY	H03F2203/45582		6
H03F2203/45584	9	the IC comprising extra differentially coupled transistors for controlling purposes only	CPCONLY	H03F2203/45584		13
H03F2203/45586	9	the IC comprising offset generating means	CPCONLY	H03F2203/45586		119
H03F2203/45588	9	the IC comprising offset compensating means	CPCONLY	H03F2203/45588		136
H03F2203/45591	9	the IC comprising one or more potentiometers	CPCONLY	H03F2203/45591		117
H03F2203/45592	9	the IC comprising one or more buffer stages other than emitter or source followers between the input signal leads and input leads of the dif amp, e.g. inverter stages	CPCONLY	H03F2203/45592		34
H03F2203/45594	9	the IC comprising one or more resistors, which are not biasing resistor	CPCONLY	H03F2203/45594		399
H03F2203/45596	9	the IC comprising one or more biasing resistors	CPCONLY	H03F2203/45596		87
H03F2203/45598	9	the IC comprising an input shunting circuit comprising a resistor and a capacitor in series	CPCONLY	H03F2203/45598		15
H03F2203/45601	9	the IC comprising one or more passive resistors by feedback	CPCONLY	H03F2203/45601		85
H03F2203/45602	9	the IC comprising one or more active resistors by feedback	CPCONLY	H03F2203/45602		7
H03F2203/45604	9	the IC comprising a input shunting resistor	CPCONLY	H03F2203/45604		94
H03F2203/45606	9	the IC comprising one or more parallel resonance circuits	CPCONLY	H03F2203/45606		7
H03F2203/45608	9	the IC comprising one or more series resonance circuits	CPCONLY	H03F2203/45608		11
H03F2203/45611	9	the IC comprising only one input signal connection lead for one phase of the signal	CPCONLY	H03F2203/45611		18
H03F2203/45612	9	the IC comprising one or more input source followers as input stages in the IC	CPCONLY	H03F2203/45612		166
H03F2203/45614	9	the IC comprising two cross coupled switches	CPCONLY	H03F2203/45614		50
H03F2203/45616	9	the IC comprising more than one switch, which are not cross coupled	CPCONLY	H03F2203/45616		241
H03F2203/45618	9	the IC comprising only one switch	CPCONLY	H03F2203/45618		73
H03F2203/45621	9	the IC comprising a transformer for phase splitting the input signal	CPCONLY	H03F2203/45621		87
H03F2203/45622	9	the IC comprising a voltage generating circuit	CPCONLY	H03F2203/45622		48
H03F2203/45624	9	the LC comprising balancing means, e.g. trimming means	CPCONLY	H03F2203/45624		27
H03F2203/45626	9	the LC comprising biasing means controlled by the input signal	CPCONLY	H03F2203/45626		85
H03F2203/45628	9	the LC comprising bias stabilisation means, e.g. DC level stabilisation means, and temperature coefficient dependent control, e.g. DC level shifting means	CPCONLY	H03F2203/45628		29
H03F2203/45631	9	the LC comprising one or more capacitors, e.g. coupling capacitors	CPCONLY	H03F2203/45631		290
H03F2203/45632	9	the LC comprising one or more capacitors coupled to the LC by feedback	CPCONLY	H03F2203/45632		67
H03F2203/45634	9	the LC comprising one or more switched capacitors	CPCONLY	H03F2203/45634		72
H03F2203/45636	9	the LC comprising clamping means, e.g. diodes	CPCONLY	H03F2203/45636		49
H03F2203/45638	9	the LC comprising one or more coils	CPCONLY	H03F2203/45638		221
H03F2203/45641	9	the LC being controlled, e.g. by a signal derived from a non specified place in the dif amp circuit	CPCONLY	H03F2203/45641		129
H03F2203/45642	9	the LC, and possibly also cascaded stages following it, being (are) controlled by the common mode signal derived to control a dif amp	CPCONLY	H03F2203/45642		51
H03F2203/45644	9	the LC comprising a cross coupling circuit, e.g. comprising two cross-coupled transistors	CPCONLY	H03F2203/45644		238
H03F2203/45646	9	the LC comprising an extra current source	CPCONLY	H03F2203/45646		111
H03F2203/45648	9	the LC comprising two current sources, which are not cascode current sources	CPCONLY	H03F2203/45648		184
H03F2203/45651	9	the LC comprising two cascode current sources	CPCONLY	H03F2203/45651		70
H03F2203/45652	9	the LC comprising one or more further dif amp stages, either identical to the dif amp or not, in cascade	CPCONLY	H03F2203/45652		300
H03F2203/45654	9	the LC comprising one or more extra diodes not belonging to mirrors	CPCONLY	H03F2203/45654		59
H03F2203/45656	9	the LC comprising one diode of a current mirror, i.e. forming an asymmetrical load	CPCONLY	H03F2203/45656		30
H03F2203/45658	9	the LC comprising two diodes of current mirrors	CPCONLY	H03F2203/45658		113
H03F2203/45661	9	the LC comprising one or more controlled floating gates	CPCONLY	H03F2203/45661		6
H03F2203/45662	9	the LC comprising inductive coupled loading elements	CPCONLY	H03F2203/45662		23
H03F2203/45664	9	the LC comprising one or more cascaded inverter stages as output stage at one output of the dif amp circuit	CPCONLY	H03F2203/45664		43
H03F2203/45666	9	the LC comprising two anti-phase controlled inverter circuits as output stages, e.g. fully differential	CPCONLY	H03F2203/45666		9
H03F2203/45668	9	the LC comprising a level shifter circuit, which does not comprise diodes	CPCONLY	H03F2203/45668		27
H03F2203/45671	9	the LC comprising one or more diodes as level shifter	CPCONLY	H03F2203/45671		16
H03F2203/45672	9	the LC comprising one or more resistors as level shifter	CPCONLY	H03F2203/45672		9
H03F2203/45674	9	the LC comprising one current mirror	CPCONLY	H03F2203/45674		375
H03F2203/45676	9	the LC comprising one cascode current mirror	CPCONLY	H03F2203/45676		72
H03F2203/45678	9	the LC comprising offset generating means	CPCONLY	H03F2203/45678		19
H03F2203/45681	9	the LC comprising offset compensating means	CPCONLY	H03F2203/45681		134
H03F2203/45682	9	the LC comprising one or more op-amps	CPCONLY	H03F2203/45682		75
H03F2203/45684	9	the LC comprising one or more buffers or driving stages not being of the emitter respectively source follower type, between the output of the dif amp and the output stage	CPCONLY	H03F2203/45684		41
H03F2203/45686	9	the LC comprising one or more potentiometers, which are not shunting potentiometers	CPCONLY	H03F2203/45686		101
H03F2203/45688	9	the LC comprising one or more shunting potentiometers	CPCONLY	H03F2203/45688		27
H03F2203/45691	9	the LC comprising one or more transistors as active loading resistors	CPCONLY	H03F2203/45691		32
H03F2203/45692	9	the LC comprising one or more resistors in series with a capacitor coupled to the LC by feedback	CPCONLY	H03F2203/45692		36
H03F2203/45694	9	the LC comprising more than one shunting resistor	CPCONLY	H03F2203/45694		35
H03F2203/45696	9	the LC comprising more than two resistors	CPCONLY	H03F2203/45696		134
H03F2203/45698	9	the LC comprising one or more resistors coupled to the LC by feedback (active or passive)	CPCONLY	H03F2203/45698		42
H03F2203/45701	9	the LC comprising one resistor	CPCONLY	H03F2203/45701		91
H03F2203/45702	9	the LC comprising two resistors	CPCONLY	H03F2203/45702		625
H03F2203/45704	9	the LC comprising one or more parallel resonance circuits	CPCONLY	H03F2203/45704		83
H03F2203/45706	9	the LC comprising one or more series resonance circuits	CPCONLY	H03F2203/45706		14
H03F2203/45708	9	the LC comprising one SEPP circuit as output stage	CPCONLY	H03F2203/45708		25
H03F2203/45711	9	the LC comprising two anti-phase controlled SEPP circuits as output stages, e.g. fully differential	CPCONLY	H03F2203/45711		40
H03F2203/45712	9	the LC comprising a capacitor as shunt	CPCONLY	H03F2203/45712		56
H03F2203/45714	9	the LC comprising a coil as shunt	CPCONLY	H03F2203/45714		12
H03F2203/45716	9	the LC comprising a RC-series circuit as shunt, e.g. for stabilisation	CPCONLY	H03F2203/45716		18
H03F2203/45718	9	the LC comprising a resistor as shunt	CPCONLY	H03F2203/45718		29
H03F2203/45721	9	the LC comprising only an output circuit for one phase of the signal	CPCONLY	H03F2203/45721		4
H03F2203/45722	9	the LC comprising one or more source followers, as post buffer or driver stages, in cascade in the LC	CPCONLY	H03F2203/45722		168
H03F2203/45724	9	the LC comprising two cross coupled switches	CPCONLY	H03F2203/45724		33
H03F2203/45726	9	the LC comprising more than one switch, which are not cross coupled	CPCONLY	H03F2203/45726		239
H03F2203/45728	9	the LC comprising one switch	CPCONLY	H03F2203/45728		80
H03F2203/45731	9	the LC comprising a transformer	CPCONLY	H03F2203/45731		242
H03F2203/45732	9	the LC comprising a voltage generating circuit	CPCONLY	H03F2203/45732		50
H03F2203/50	8	Indexing scheme relating to amplifiers in which input being applied to, or output being derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower	CPCONLY	H03F2203/50		1
H03F2203/5003	9	the sources of two source followers are differentially coupled	CPCONLY	H03F2203/5003		11
H03F2203/5006	9	the input signal being capacitively coupled to the gate of the source follower	CPCONLY	H03F2203/5006		9
H03F2203/5009	9	the output signal being capacitively coupled to the source of the source follower	CPCONLY	H03F2203/5009		8
H03F2203/5012	9	the source follower has a controlled source circuit, the controlling signal being derived from the drain circuit of the follower	CPCONLY	H03F2203/5012		32
H03F2203/5015	9	the source follower has a controlled source circuit, the controlling signal being derived from the gate circuit of the follower	CPCONLY	H03F2203/5015		12
H03F2203/5018	9	the source follower has a controlled source circuit, the controlling signal being derived from the source circuit of the follower	CPCONLY	H03F2203/5018		20
H03F2203/5021	9	the source follower has a controlled source circuit	CPCONLY	H03F2203/5021		36
H03F2203/5024	9	the source follower has a controlled source circuit, the source circuit being controlled via a capacitor, i.e. AC-controlled	CPCONLY	H03F2203/5024		18
H03F2203/5027	9	the source follower has a current mirror output circuit in its source circuit	CPCONLY	H03F2203/5027		18
H03F2203/5031	9	the source circuit of the follower being a current source	CPCONLY	H03F2203/5031		55
H03F2203/5033	9	Two source followers are controlled at their inputs by a differential signal	CPCONLY	H03F2203/5033		21
H03F2203/5036	9	the source follower has a resistor in its source circuit	CPCONLY	H03F2203/5036		27
H03F2203/5039	9	the source circuit of the follower has one or more capacitors between source and supply	CPCONLY	H03F2203/5039		11
H03F2203/5042	9	the source circuit of the follower has one or more coils between source and supply	CPCONLY	H03F2203/5042		5
H03F2203/5045	9	the source follower has a level shifter between source and output, e.g. a diode-connected transistor	CPCONLY	H03F2203/5045		8
H03F2203/72	8	Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal	CPCONLY	H03F2203/72		4
H03F2203/7203	9	the gated amplifier being switched on or off by a switch in the bias circuit of the amplifier controlling a bias current in the amplifier	CPCONLY	H03F2203/7203		81
H03F2203/7206	9	the gated amplifier being switched on or off by a switch in the bias circuit of the amplifier controlling a bias voltage in the amplifier	CPCONLY	H03F2203/7206		178
H03F2203/7209	9	the gated amplifier being switched from a first band to a second band	CPCONLY	H03F2203/7209		480
H03F2203/7212	9	the gated amplifier being switched on or off by switching off or on a feedback control loop of the amplifier	CPCONLY	H03F2203/7212		25
H03F2203/7215	9	the gated amplifier being switched on or off by a switch at the input of the amplifier	CPCONLY	H03F2203/7215		180
H03F2203/7218	9	the gated amplifier being switched on or off by clamping by a switch at the input of the amplifier	CPCONLY	H03F2203/7218		5
H03F2203/7221	9	the gated amplifier being switched on or off by a switch at the output of the amplifier	CPCONLY	H03F2203/7221		187
H03F2203/7224	9	the gated amplifier being switched on or off by clamping by a switch at the output of the amplifier	CPCONLY	H03F2203/7224		22
H03F2203/7227	9	the gated amplifier being switched on or off by a switch in the supply circuit of the amplifier	CPCONLY	H03F2203/7227		96
H03F2203/7231	9	the gated amplifier being switched on or off by putting into cascade or not, by choosing between amplifiers by one or more switch(es)	CPCONLY	H03F2203/7231		59
H03F2203/7233	9	the gated amplifier, switched on or off by putting into parallel or not, by choosing between amplifiers by one or more switch(es), being impedance adapted by switching an adapted passive network	CPCONLY	H03F2203/7233		71
H03F2203/7236	9	the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers by (a ) switch(es)	CPCONLY	H03F2203/7236		441
H03F2203/7239	9	the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers and shunting lines by one or more switch(es)	CPCONLY	H03F2203/7239		238
