H03D1/00	7	Demodulation of amplitude-modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)	H03D1/00	H03D1/00		290
H03D1/02	8	Details	H03D1/02	H03D1/02		49
H03D1/04	9	Modifications of demodulators to reduce interference by undesired signals	H03D1/04	H03D1/04		138
H03D1/06	9	Modifications of demodulators to reduce distortion, e.g. by negative feedback	H03D1/06	H03D1/06		111
H03D1/08	8	by means of non-linear two-pole elements (H03D1/22, H03D1/26, H03D1/28 take precedence)	H03D1/08	H03D1/08		118
H03D1/10	9	of diodes	H03D1/10	H03D1/10		395
H03D1/12	10	with provision for equalising AC and DC loads	H03D1/12	H03D1/12		13
H03D1/14	8	by means of non-linear elements having more than two poles (H03D1/22, H03D1/26, H03D1/28 take precedence)	H03D1/14	H03D1/14		1
H03D1/16	9	of discharge tubes	H03D1/16	H03D1/16		247
H03D1/18	9	of semiconductor devices	H03D1/18	H03D1/18		368
H03D1/20	9	with provision for preventing undesired type of demodulation, e.g. preventing anode detection in a grid detection circuit	H03D1/20	H03D1/20		8
H03D1/22	8	Homodyne or synchrodyne circuits {(receiver circuits H04B1/30)}	H03D1/22	H03D1/22		342
H03D1/2209	9	{Decoders for simultaneous demodulation and decoding of signals composed of a sum-signal and a suppressed carrier, amplitude modulated by a difference signal, e.g. stereocoders}	H03D1/22	H03D1/22		21
H03D1/2218	10	{using diodes for the decoding}	H03D1/22	H03D1/22		114
H03D1/2227	10	{using switches for the decoding (diodes used as switches H03D1/2218)}	H03D1/22	H03D1/22		84
H03D1/2236	10	{using a phase locked loop}	H03D1/22	H03D1/22		130
H03D1/2245	9	{using two quadrature channels (H03D1/2209 takes precedence)}	H03D1/22	H03D1/22		182
H03D1/2254	10	{and a phase locked loop}	H03D1/22	H03D1/22		77
H03D2001/2263	11	{including a counter or a divider in the PLL}	H03D1/22	H03D1/22		
H03D1/2272	9	{using FET&apos;s (H03D1/2209, H03D1/2245 and H03D1/2281 take precedence)}	H03D1/22	H03D1/22		35
H03D1/2281	9	{using a phase locked loop (H03D1/2236 and H03D1/2254 take precedence)}	H03D1/22	H03D1/22		39
H03D1/229	9	{using at least a two emittor-coupled differential pair of transistors (H03D1/2209&#160;-&#160;H03D1/2281 take precedence)}	H03D1/22	H03D1/22		53
H03D1/24	9	for demodulation of signals wherein one sideband or the carrier has been wholly or partially suppressed {(receiver circuits H04B1/302)}	H03D1/24	H03D1/24		182
H03D1/26	8	by means of transit-time tubes	H03D1/26	H03D1/26		100
H03D1/28	8	by deflecting an electron beam in a discharge tube (H03D1/26 takes precedence)	H03D1/28	H03D1/28		14
H03D3/00	7	Demodulation of angle-, {frequency- or phase-} modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)	H03D3/00	H03D3/00		348
H03D3/001	8	{Details of arrangements applicable to more than one type of frequency demodulator (H03D3/28 takes precedence)}	H03D3/00	H03D3/00		74
H03D3/002	9	{Modifications of demodulators to reduce interference by undesired signals (H03D3/248 takes precedence)}	H03D3/00	H03D3/00		119
H03D3/003	9	{Arrangements for reducing frequency deviation, e.g. by negative frequency feedback (combined with a phase locked loop demodulator H03D3/242; changing frequency deviation for modulators H03C3/06)}	H03D3/00	H03D3/00		31
H03D3/004	10	{wherein the demodulated signal is used for controlling an oscillator, e.g. the local oscillator}	H03D3/00	H03D3/00		123
H03D3/005	10	{wherein the demodulated signal is used for controlling a bandpass filter (automatic bandwidth control H03G; automatic frequency control H03J7/02)}	H03D3/00	H03D3/00		66
H03D3/006	8	{by sampling the oscillations and further processing the samples, e.g. by computing techniques (H03D3/007 takes precedence)}	H03D3/00	H03D3/00		279
H03D3/007	8	{by converting the oscillations into two quadrature related signals (H03D3/245 takes precedence)}	H03D3/00	H03D3/00		529
H03D3/008	9	{Compensating DC offsets}	H03D3/00	H03D3/00		269
H03D3/009	9	{Compensating quadrature phase or amplitude imbalances}	H03D3/00	H03D3/00		349
H03D3/02	8	by detecting phase difference between two signals obtained from input signal (H03D3/28&#160;-&#160;H03D3/32 take precedence; {muting in frequency-modulation receivers H03G3/28}; limiting arrangements H03G11/00)	H03D3/02	H03D3/02		186
H03D3/04	9	by counting or integrating cycles of oscillations {(arrangements for measuring frequencies G01R23/10)}	H03D3/04	H03D3/04		280
H03D3/06	9	by combining signals additively or in product demodulators	H03D3/06	H03D3/06		81
H03D3/08	10	by means of diodes, e.g. Foster-Seeley discriminator	H03D3/08	H03D3/08		205
H03D3/10	11	in which the diodes are simultaneously conducting during the same half period of the signal, e.g. radio detector	H03D3/10	H03D3/10		123
H03D3/12	10	by means of discharge tubes having more than two electrodes	H03D3/12	H03D3/12		53
H03D3/14	10	by means of semiconductor devices having more than two electrodes	H03D3/14	H03D3/14		123
H03D3/16	10	by means of electromechanical resonators	H03D3/16	H03D3/16		145
H03D3/18	9	by means of synchronous gating arrangements	H03D3/18	H03D3/18		83
H03D3/20	10	producing pulses whose amplitude or duration depends on phase difference	H03D3/20	H03D3/20		71
H03D3/22	9	by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector	H03D3/22	H03D3/22		151
H03D3/24	9	Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits	H03D3/24	H03D3/24		119
H03D3/241	10	{the oscillator being part of a phase locked loop}	H03D3/24	H03D3/24		219
H03D3/242	11	{combined with means for controlling the frequency of a further oscillator, e.g. for negative frequency feedback or AFC}	H03D3/24	H03D3/24		55
H03D3/244	11	{combined with means for obtaining automatic gain control}	H03D3/24	H03D3/24		46
H03D3/245	11	{using at least twophase detectors in the loop (H03D3/244 takes precedence; in general H03L7/087)}	H03D3/24	H03D3/24		36
H03D3/247	11	{using a controlled phase shifter (in general H03L7/081)}	H03D3/24	H03D3/24		13
H03D3/248	11	{with means for eliminating interfering signals, e.g. by multiple phase locked loops (multiple loops in general H03L7/07, H03L7/22)}	H03D3/24	H03D3/24		21
H03D3/26	8	by means of sloping amplitude/frequency characteristic of tuned or reactive circuit (H03D3/28&#160;-&#160;H03D3/32 takes precedence)	H03D3/26	H03D3/26		112
H03D3/28	8	Modifications of demodulators to reduce effects of temperature variations ({automatic frequency regulation in receivers H03J}; automatic frequency control H03L)	H03D3/28	H03D3/28		14
H03D3/30	8	by means of transit-time tubes	H03D3/30	H03D3/30		6
H03D3/32	8	by deflecting an electron beam in a discharge tube (H03D3/30 takes precedence)	H03D3/32	H03D3/32		26
H03D3/34	8	by means of electromechanical devices (H03D3/16 takes precedence)	H03D3/34	H03D3/34		15
H03D5/00	7	Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will (H03D9/00, H03D11/00 take precedence)	H03D5/00	H03D5/00		340
H03D7/00	7	Transference of modulation from one carrier to another, e.g. frequency-changing (H03D9/00, H03D11/00 take precedence; dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers H03F)	H03D7/00	H03D7/00		710
H03D7/005	8	{by means of superconductive devices}	H03D7/00	H03D7/00		59
H03D7/02	8	by means of diodes (H03D7/14&#160;-&#160;H03D7/22 take precedence)	H03D7/02	H03D7/02		194
H03D7/04	9	having {a partially} negative resistance characteristic, e.g. tunnel diode	H03D7/04	H03D7/04		44
H03D7/06	8	by means of discharge tubes having more than two electrodes (H03D7/14&#160;-&#160;H03D7/22 take precedence)	H03D7/06	H03D7/06		54
H03D7/08	9	the signals to be mixed being applied between the same two electrodes	H03D7/08	H03D7/08		250
H03D7/10	9	the signals to be mixed being applied between different pairs of electrodes	H03D7/10	H03D7/10		285
H03D7/12	8	by means of semiconductor devices having more than two electrodes (H03D7/14&#160;-&#160;H03D7/22 take precedence)	H03D7/12	H03D7/12		469
H03D7/125	9	{with field effect transistors}	H03D7/12	H03D7/12		452
H03D7/14	8	Balanced arrangements	H03D7/14	H03D7/14		313
H03D7/1408	9	{with diodes}	H03D7/14	H03D7/14		534
H03D7/1416	9	{with discharge tubes having more than two electrodes}	H03D7/14	H03D7/14		70
H03D7/1425	9	{with transistors}	H03D7/14	H03D7/14		209
H03D7/1433	10	{using bipolar transistors (H03D7/145 takes precedence)}	H03D7/14	H03D7/14		548
H03D7/1441	10	{using field-effect transistors (H03D7/145 takes precedence)}	H03D7/14	H03D7/14		1092
H03D7/145	10	{using a combination of bipolar transistors and field-effect transistors}	H03D7/14	H03D7/14		94
H03D7/1458	10	{Double balanced arrangements, i.e. where both input signals are differential}	H03D7/14	H03D7/14		1111
H03D7/1466	10	{Passive mixer arrangements}	H03D7/14	H03D7/14		370
H03D7/1475	10	{Subharmonic mixer arrangements}	H03D7/14	H03D7/14		100
H03D7/1483	10	{comprising components for selecting a particular frequency component of the output}	H03D7/14	H03D7/14		236
H03D7/1491	10	{Arrangements to linearise a transconductance stage of a mixer arrangement}	H03D7/14	H03D7/14		362
H03D7/16	8	Multiple-frequency-changing	H03D7/16	H03D7/16		824
H03D7/161	9	{all the frequency changers being connected in cascade}	H03D7/16	H03D7/16		442
H03D7/163	10	{the local oscillations of at least two of the frequency changers being derived from a single oscillator}	H03D7/16	H03D7/16		344
H03D7/165	9	{at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature (combined with amplitude demodulation H03D1/2245, combined with angle demodulation H03D3/007; N-path filters H03H19/002)}	H03D7/16	H03D7/16		1130
H03D7/166	10	{using two or more quadrature frequency translation stages}	H03D7/16	H03D7/16		266
H03D7/168	11	{using a feedback loop containing mixers or demodulators}	H03D7/16	H03D7/16		77
H03D7/18	8	Modifications of frequency-changers for eliminating image frequencies {(H03D7/16 takes precedence)}	H03D7/18	H03D7/18		555
H03D7/20	8	by means of transit-time tubes	H03D7/20	H03D7/20		57
H03D7/22	8	by deflecting an electron beam in a discharge tube (H03D7/20 takes precedence)	H03D7/22	H03D7/22		15
H03D9/00	7	Demodulation or transference of modulation of modulated electromagnetic waves (demodulating light, transferring modulation in light waves G02F2/00)	H03D9/00	H03D9/00		100
H03D9/02	8	Demodulation using distributed inductance and capacitance, e.g. in feeder lines	H03D9/02	H03D9/02		119
H03D9/04	9	for angle-modulated oscillations	H03D9/04	H03D9/04		141
H03D9/06	8	Transference of modulation using distributed inductance and capacitance	H03D9/06	H03D9/06		160
H03D9/0608	9	{by means of diodes}	H03D9/06	H03D9/06		121
H03D9/0616	10	{mounted in a hollow waveguide (H03D9/0641 takes precedence)}	H03D9/06	H03D9/06		186
H03D9/0625	10	{mounted in a coaxial resonator structure}	H03D9/06	H03D9/06		86
H03D9/0633	10	{mounted on a stripline circuit}	H03D9/06	H03D9/06		340
H03D9/0641	11	{located in a hollow waveguide}	H03D9/06	H03D9/06		122
H03D9/065	9	{by means of discharge tubes having more than two electrodes}	H03D9/06	H03D9/06		58
H03D9/0658	9	{by means of semiconductor devices having more than two electrodes}	H03D9/06	H03D9/06		22
H03D9/0666	10	{using bipolar transistors (H03D9/0683 takes precedence)}	H03D9/06	H03D9/06		53
H03D9/0675	10	{using field effect transistors (H03D9/0683 takes precedence)}	H03D9/06	H03D9/06		73
H03D9/0683	10	{using a combination of bipolar transistors and field effect transistors}	H03D9/06	H03D9/06		3
H03D2009/0691	9	{by means of superconductive devices}	H03D9/06	H03D9/06		3
H03D11/00	7	Super-regenerative demodulator circuits {(applications in responders G01S)}	H03D11/00	H03D11/00		23
H03D11/02	8	for amplitude-modulated oscillations	H03D11/02	H03D11/02		364
H03D11/04	9	by means of semiconductor devices having more than two electrodes	H03D11/04	H03D11/04		63
H03D11/06	8	for angle-modulated oscillations	H03D11/06	H03D11/06		42
H03D11/08	9	by means of semiconductor devices having more than two electrodes	H03D11/08	H03D11/08		19
H03D13/00	7	Circuits for comparing the phase or frequency of two mutually-independent oscillations {(measuring phase G01R25/00; phase-discriminators with yes/no output G01R25/005)}	H03D13/00	H03D13/00		286
H03D13/001	8	{in which a pulse counter is used followed by a conversion into an analog signal}	H03D13/00	H03D13/00		57
H03D13/002	9	{the counter being an up-down counter}	H03D13/00	H03D13/00		33
H03D13/003	8	{in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means}	H03D13/00	H03D13/00		220
H03D13/004	9	{the logic means delivering pulses at more than one terminal, e.g. up and down pulses}	H03D13/00	H03D13/00		392
H03D13/005	8	{in which one of the oscillations is, or is converted into, a signal having a special waveform, e.g. triangular}	H03D13/00	H03D13/00		37
H03D13/006	9	{and by sampling this signal by narrow pulses obtained from the second oscillation}	H03D13/00	H03D13/00		50
H03D13/007	8	{by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations}	H03D13/00	H03D13/00		39
H03D13/008	9	{using transistors}	H03D13/00	H03D13/00		83
H03D13/009	9	{using diodes}	H03D13/00	H03D13/00		63
H03D99/00	7	Subject matter not provided for in other groups of this subclass	H03D99/00	H03D99/00		1
H03D2200/00	7	Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D	CPCONLY	H03D2200/00		
H03D2200/0001	8	Circuit elements of demodulators	CPCONLY	H03D2200/0001		2
H03D2200/0003	9	Rat race couplers	CPCONLY	H03D2200/0003		36
H03D2200/0005	9	Wilkinson power dividers or combiners	CPCONLY	H03D2200/0005		11
H03D2200/0007	9	Dual gate field effect transistors	CPCONLY	H03D2200/0007		39
H03D2200/0009	9	Emitter or source coupled transistor pairs or long tail pairs	CPCONLY	H03D2200/0009		48
H03D2200/0011	9	Diodes	CPCONLY	H03D2200/0011		9
H03D2200/0013	10	Diodes connected in a ring configuration	CPCONLY	H03D2200/0013		65
H03D2200/0015	10	Diodes connected in a star configuration	CPCONLY	H03D2200/0015		6
H03D2200/0017	9	Intermediate frequency filter	CPCONLY	H03D2200/0017		69
H03D2200/0019	9	Gilbert multipliers	CPCONLY	H03D2200/0019		86
H03D2200/0021	9	Frequency multipliers	CPCONLY	H03D2200/0021		14
H03D2200/0023	9	Balun circuits	CPCONLY	H03D2200/0023		255
H03D2200/0025	9	Gain control circuits	CPCONLY	H03D2200/0025		235
H03D2200/0027	10	including arrangements for assuring the same gain in two paths	CPCONLY	H03D2200/0027		32
H03D2200/0029	9	Loop circuits with controlled phase shift	CPCONLY	H03D2200/0029		26
H03D2200/0031	9	PLL circuits with quadrature locking, e.g. a Costas loop	CPCONLY	H03D2200/0031		46
H03D2200/0033	9	Current mirrors	CPCONLY	H03D2200/0033		197
H03D2200/0035	9	Digital multipliers and adders used for detection	CPCONLY	H03D2200/0035		21
H03D2200/0037	9	Diplexers	CPCONLY	H03D2200/0037		35
H03D2200/0039	9	Exclusive OR logic circuits	CPCONLY	H03D2200/0039		22
H03D2200/0041	8	Functional aspects of demodulators	CPCONLY	H03D2200/0041		4
H03D2200/0043	9	Bias and operating point	CPCONLY	H03D2200/0043		332
H03D2200/0045	9	Calibration of demodulators	CPCONLY	H03D2200/0045		39
H03D2200/0047	9	Offset of DC voltage or frequency	CPCONLY	H03D2200/0047		224
H03D2200/0049	9	Analog multiplication for detection	CPCONLY	H03D2200/0049		18
H03D2200/005	9	Analog to digital conversion	CPCONLY	H03D2200/005		152
H03D2200/0052	9	Digital to analog conversion	CPCONLY	H03D2200/0052		58
H03D2200/0054	9	Digital filters	CPCONLY	H03D2200/0054		51
H03D2200/0056	10	including a digital decimation filter	CPCONLY	H03D2200/0056		26
H03D2200/0058	10	using a digital filter with interpolation	CPCONLY	H03D2200/0058		13
H03D2200/006	9	Signal sampling	CPCONLY	H03D2200/006		107
H03D2200/0062	10	Computation of input samples, e.g. successive samples	CPCONLY	H03D2200/0062		61
H03D2200/0064	9	Detection of passages through null of a signal	CPCONLY	H03D2200/0064		15
H03D2200/0066	9	Mixing	CPCONLY	H03D2200/0066		163
H03D2200/0068	10	by computation	CPCONLY	H03D2200/0068		12
H03D2200/007	10	by using a logic circuit, e.g. flipflop, XOR	CPCONLY	H03D2200/007		23
H03D2200/0072	10	by complex multiplication	CPCONLY	H03D2200/0072		17
H03D2200/0074	10	using a resistive mixer or a passive mixer	CPCONLY	H03D2200/0074		68
H03D2200/0076	10	using a distributed mixer	CPCONLY	H03D2200/0076		16
H03D2200/0078	10	using a switched phase shifter or delay line	CPCONLY	H03D2200/0078		43
H03D2200/008	9	Hilbert type transformation	CPCONLY	H03D2200/008		14
H03D2200/0082	9	Quadrature arrangements	CPCONLY	H03D2200/0082		194
H03D2200/0084	9	Lowering the supply voltage and saving power	CPCONLY	H03D2200/0084		270
H03D2200/0086	9	Reduction or prevention of harmonic frequencies	CPCONLY	H03D2200/0086		133
H03D2200/0088	9	Reduction of intermodulation, nonlinearities, adjacent channel interference; intercept points of harmonics or intermodulation products	CPCONLY	H03D2200/0088		234
H03D2200/009	9	Reduction of local oscillator or RF leakage	CPCONLY	H03D2200/009		201
H03D2200/0092	9	Detection or reduction of fading in multipath transmission arrangements	CPCONLY	H03D2200/0092		7
H03D2200/0094	9	Measures to address temperature induced variations of demodulation	CPCONLY	H03D2200/0094		4
H03D2200/0096	10	by stabilising the temperature	CPCONLY	H03D2200/0096		23
H03D2200/0098	10	by compensating temperature induced variations	CPCONLY	H03D2200/0098		17
