Patents
Sitemap › H03 - Basic electronic circuitry › H03G - Control of amplification › H03G 3 - Gain control in amplifiers or frequency changers
Patents for H03G 3 - Gain control in amplifiers or frequency changers (20,162)
01/1990
01/10/1990EP0350299A2 Bi-directional DC power controller with fault protection
01/10/1990EP0350155A2 Gain cell with digital control
01/09/1990US4893349 FM communication system with improved response to rayleigh-faded received signals
01/09/1990US4893347 FM communication system with improved response to Rayleigh-faded companded signals
01/03/1990EP0348888A2 Overflow speech detecting apparatus
01/03/1990EP0348396A1 Radio receiver speech amplifier circuit.
01/02/1990US4891605 Adaptive gain control amplifier
12/1989
12/27/1989CN1006269B Multi-level power amplifying circuitry for portable radio transoeivers
12/27/1989CA1264067A1 Multi-level power amplifying circuitry for portable radio transceivers
12/26/1989US4890070 Device to control the output power of a class C amplifier
12/20/1989EP0347141A2 Improved RF power-control circuit
12/20/1989EP0347031A2 Adjusting apparatus for adjusting sound volume or sound quality
12/19/1989US4888810 Analog volume control circuit
12/19/1989US4888496 Circuitry for adjusting the amplitude of analog signals
12/12/1989US4887299 Adaptive, programmable signal processing hearing aid
12/12/1989US4887298 Electronic circuit for sensing disconnect or failure of a power output sense line in an audio power system
12/06/1989EP0344510A2 A muting circuit for audio amplifiers
12/05/1989US4885799 Load pull isolation switch for a fast locking synthesizer
12/05/1989US4885792 Audio mixer architecture using virtual gain control and switching
12/05/1989US4885547 Gain cell with digital control
11/1989
11/28/1989US4884141 Automatic gain control circuit
11/28/1989CA1263474A1 Digital level detecting circuit
11/23/1989EP0342671A2 AGC delay on an integrated circuit
11/21/1989CA1263189A1 Automatic level control circuit for an ad converter
11/21/1989CA1263188A1 Device for amplifying and sampling highly dynamic signals
11/15/1989EP0341299A1 Speaker volume control apparatus
11/15/1989EP0341292A1 Adaptive, programmable signal processing hearing aid
11/14/1989US4881047 Automatic gain expansion system
11/08/1989EP0340719A2 Amplifier circuit
11/01/1989CN1036869A Receiver and demodulation circuit suitable for said receiver
10/1989
10/31/1989US4878031 Class B variable gain control circuit
10/24/1989US4876499 Differental voltage controlled exponential current source
10/24/1989US4876459 Toggling speakerswitch
10/18/1989EP0337561A1 Control amplifier
10/18/1989EP0337458A2 Apparatus for synthesizing analog signals in PCM
10/18/1989EP0337222A2 Controllable amplifier circuit
10/17/1989US4875049 Automatic level control circuit for an ad convertor
10/17/1989US4875020 Analog integrated circuit having intrinsic topologies and characteristics selectable by a digital control
10/12/1989DE3910724A1 Arrangement for gain control in a vehicle
10/12/1989DE3742796A1 Amplifier with a transistor stage with current feedback
10/11/1989EP0336506A1 Receiver and demodulation circuit suitable for said receiver
10/10/1989US4873492 Amplifier with modulated resistor gain control
10/05/1989DE3808904A1 Integrated transistor amplifier stage
10/04/1989CN1035949A Data converter for ct data acquisition system
10/03/1989US4872206 Mixer dynamic control
09/1989
09/27/1989EP0148879B1 Squelch circuit
09/27/1989CN1035924A Radio station having wide-band automatic gain controlling circuit
09/26/1989US4870698 Output power control circuit for a mobile radio apparatus
09/26/1989US4870511 Device for demodulating a frequency-modulated signal
09/26/1989US4870373 Constant phase gain control circuit
09/26/1989US4870372 AGC delay on an integrated circuit
09/26/1989US4870370 Method and apparatus for two stage automatic gain control
09/26/1989US4870369 Circuit arrangement having a pre-amplifier connected to an opto-electric transducer
09/26/1989CA1261959A1 Automatic gain control for hearing aid
09/26/1989CA1260616A1 Device for the amplification and sampling of deplexed analog signals
09/26/1989CA1260081A1 High frequency amplifier circuit
09/19/1989US4868889 Microwave absorber attenuator for linear SSPA power control
09/19/1989US4868881 Method and system of background noise suppression in an audio circuit particularly for car radios
09/19/1989US4868870 Servo-controlled amplifier and method for compensating for transducer nonlinearities
09/19/1989US4868519 Microprocessor-controlled amplifier
09/19/1989US4868517 Variolosser
09/13/1989EP0332367A2 Wide range linear automatic gain control amplifier
09/13/1989EP0331715A1 Automatic gain control system
09/12/1989US4866711 Method of multiplex/demultiplex processing of information and equipment for performing the method
09/06/1989EP0331304A2 Amplification of optical signals
09/06/1989EP0330908A2 Car radio with a traffic broadcast decoder
09/05/1989US4864251 Compensation circuit for power amplifier
09/05/1989US4864248 Amplifier arrangement with controllable gain
09/05/1989US4864246 Mobile automatic volume control apparatus
09/05/1989US4864155 Circuitry for suppressing audible noise
08/1989
08/30/1989EP0330501A2 Measurement arrangement with automatic gain control circuit
08/30/1989EP0330062A1 Radio receiver for a vehicle
08/29/1989US4862159 Centralized system for selecting and reproducing perceptible programs
08/29/1989US4862097 Pulsating noise removal device
08/29/1989US4861978 Automatic gain setting circuit
08/29/1989CA1258889A1 Apparatus for smoothing an abrupt change in signal level
08/24/1989WO1989007860A1 Radio receiver for vehicles
08/22/1989US4859965 Optical gain control of GaAs microwave monolithic integrated circuit distributed amplifier
08/22/1989US4859964 Method and circuit for automatic gain control of a signal
08/22/1989US4859955 Apparatus for smoothing an abrupt change in signal level
08/16/1989EP0328180A1 Amplifier arrangement with output-swing limitation
08/15/1989US4857930 Circuit for reducing differential nonlinearities in multi-stage digital-to-analog converters
08/15/1989CA1258535A1 High speed multiplying digital to analog converter
08/15/1989CA1258500A1 Automatic gain control amplifier circuit
08/10/1989WO1989007366A1 Circuit arrangement with adjustable active and/or passive components
08/09/1989EP0326905A1 Hearing aid signal-processing system
08/09/1989EP0326742A2 Arrangement for controlling the amplitude of an electric signal for a digital electronic apparatus and corresponding method of control
08/08/1989US4856084 Noise blanking system for an AM radio receiver
08/08/1989US4855965 Time ramped gain for borehole televiewer
08/08/1989US4855685 Precision switchable gain circuit
08/02/1989EP0326251A1 Gain control circuit
08/01/1989US4853612 RF power control circuit
08/01/1989US4853609 Distortion-free, opposite-phase current source
07/1989
07/26/1989EP0325252A2 Gain control circuit for amplifier having stepwise variable gain
07/25/1989US4852175 Hearing aid signal-processing system
07/18/1989US4850038 Frequency converter
07/18/1989US4850035 Method and apparatus for regulating a single sideband up converter
07/18/1989US4849713 High-dynamics amplifier stage with distortion detection
07/18/1989US4849712 Amplifier gain control circuit arrangements
07/18/1989US4849711 Automatic gain control system
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