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)
07/1991
07/09/1991US5030923 Variable gain amplifier
07/04/1991DE4042047A1 Voltage control amplifier with differential transistor pairs - has emitter magnitude of one transistor pair as multiple of other transistor pair emitter magnitude
07/03/1991EP0435048A2 Broadband amplifier stage with controllable amplification
07/03/1991EP0435018A2 Radio receiver
07/02/1991US5029298 Transmitter circuit
07/02/1991US5029182 Automatic gain control (AGC) for frequency hopping receiver
07/02/1991US5029162 Automatic gain control using root-mean-square circuitry in a digital domain conference bridge for a telephone network
07/02/1991US5029005 Apparatus for the muting of an audio power amplifier in a standby mode
06/1991
06/26/1991EP0434294A2 A power control method for a voltage controlled power amplifier and circuitry used in the method
06/26/1991EP0434266A2 An audio system for amplifying an audio signal
06/26/1991EP0434265A2 Audio limiter using voltage multiplexed feedback
06/25/1991US5027432 Motor vehicle radio with an automatic volume control device
06/25/1991US5027083 General purpose low cost digital amplitude regulator
06/25/1991CA1285229C Spatial reverberation
06/19/1991EP0433090A2 Demodulation control arrangement in satellite communications system using "SCPC-DAMA"
06/19/1991EP0432399A2 Broadband transmission system
06/13/1991WO1991008624A1 Method and apparatus for random fm noise cancellation
06/12/1991EP0431435A1 AGC circuit in a demodulator of a digital receiver
06/11/1991US5023940 Low-power DSP squelch
06/11/1991US5023937 Transmitter with improved linear amplifier control
06/05/1991EP0430034A2 Automatic gain control
06/04/1991US5021753 Splatter controlled amplifier
06/04/1991US5021747 Symmetrical variable impedance apparatus employing MOS transistors
06/04/1991US5021693 Control circuit for floating gate four-quadrant analog multiplier
05/1991
05/30/1991WO1991007817A1 Rf wideband high power amplifier
05/29/1991EP0429021A2 A receiver capable of quickly suppressing defective effect of multipath reflection interference
05/28/1991US5020141 Adaptive identifying signal detector
05/28/1991US5019922 Multi-disk player with automatic volume control
05/22/1991EP0428173A2 Radio frequency signal amplifying circuit in radio receiver
05/22/1991EP0428170A2 Radio receiver comprising automatic gain controlling function
05/22/1991EP0313650A4 Microwave absorber attenuator for linear sspa power control
05/21/1991US5018205 Automatic sound level compensator for a sound reproduction device mounted in a vehicle
05/21/1991US5017880 Varying operational frequency control circuit apparatus with noise minimizing feature
05/16/1991WO1991007067A1 High fidelity hearing aid amplifier
05/16/1991DE4010001C1 Amplifier with stepped adjustable gain - provided by three stages switched in cascade and comprising intermediate attenuator between input and output amplifiers
05/15/1991EP0427164A2 Noise reduction circuit for FM receiver
05/15/1991EP0426792A1 Digital signal processor based agc.
05/15/1991EP0348396A4 Radio receiver speech amplifier circuit
05/14/1991US5016205 Digital signal processor based AGC
05/14/1991US5016006 Audio alarm outputting device for outboard engine
05/14/1991US5015969 Amplifier control system
05/14/1991US5015839 Automatic gain multiplication factor control apparatus and method
05/08/1991EP0425878A2 High-efficiency audio amplifier
05/08/1991EP0425745A1 Signal conditioner system for musical instruments
05/07/1991US5014343 Data communication system
05/02/1991WO1991006150A1 Tune detecting circuit
05/02/1991EP0425033A1 Device for reading digital information recorded on an information carrier
04/1991
04/30/1991US5012202 Low impedance automatic gain control circuit
04/30/1991US5012199 Multi-stage musical instrument amplifier having distortion modes
04/24/1991EP0424009A2 Automatic gain control circuit in a radio telephone receiver
04/24/1991EP0423582A2 Method of amplification for burst-signals
04/23/1991US5010577 Electronic volume device
04/23/1991US5010306 Low cost digital amplitude regulator
04/19/1991CA2006879A1 Method for attenuating automobile audio equipment activated by audible emergency vehicle alarm
04/18/1991WO1991005415A1 Received signal strength indicator
04/18/1991DE3934215A1 D=A system with pulse width modulator - is actuated by digital system, while modulator signal is amplified
04/18/1991DE3933870A1 Controlling microphones supplied with current over cable audio cores - involves adjustment of supply voltage so that magnitude provides control information
04/16/1991US5008631 Pulse analyzer with gain compression
04/11/1991DE3933657A1 Digital vol. adjustment circuit for audio amplifier - has photoresistor as vol. adjuster in input circuit of inverting operational amplifier
04/09/1991US5006815 Linear-gain amplifier arrangement
04/09/1991US5006727 Circuit arrangement for adjusting the amplitude of a signal
04/03/1991EP0420506A2 Method of simplifying the adjustment of a radio telephone
04/03/1991EP0420343A2 Electronic control circuit for audio-signal level
04/03/1991EP0420106A1 Attenuator using a dual gate field effect transistor
04/02/1991US5005163 Level shift circuit of optical disc apparatus
04/02/1991US5004970 Device and a process for detecting current flow in a MOS transistor
03/1991
03/29/1991WO1991005406A1 Instrumentation amplifier with automatic gain control
03/29/1991CA2066705A1 Instrumentation amplifier with automatic gain control
03/27/1991EP0419186A2 An integrated dynamic amplitude limiter independent of the supply voltage
03/27/1991EP0419127A2 Noise suppression system
03/27/1991CA2026129A1 Two-gate field effect transistor attenuator
03/26/1991US5003556 Squelch circuit
03/26/1991US5003270 RF power-control circuit
03/21/1991WO1991003883A1 Improved low power dsp squelch
03/21/1991DE3930068A1 Audio information transmission system - has noise suppression stage at loudspeaker end for eliminating switching noise
03/21/1991CA2025696A1 Noise suppression system
03/20/1991EP0366680A4 A nonvolatile nonlinear reprogrammable electronic potentiometer
03/19/1991US5001440 Audio amplifier limiting for a remote power amplifier
03/19/1991CA2023396A1 Variable gain distributed amplifier
03/13/1991EP0416613A2 Transmission power control circuit
03/12/1991US4999583 Amplifier drive controller
03/06/1991EP0415503A1 Integrated circuit with detection of the saturation state
03/06/1991EP0415209A2 ABC circuit
03/01/1991CA2024354A1 Circuit arrangement for controlling the level of electrical signals
02/1991
02/27/1991EP0414352A2 Radio transmitter with output power control
02/26/1991WO1991003108A1 Gain/phase compensation for linear amplifier feedback loop
02/26/1991US4996717 Radio receiver noise squelching and operational indicating alarm
02/26/1991US4996501 Amplifier circuit having gain control
02/26/1991US4996500 For output power level of a signal generator
02/21/1991WO1991002417A1 Knowledge based radio
02/21/1991WO1991002406A1 Circuit arrangement for automatic gain control
02/20/1991EP0413311A2 A radio receiver and a radio receiver using a direct conversion
02/20/1991CN1049430A Circuit arrangement for automatic gain control
02/19/1991US4995100 Amplication of optical signals
02/19/1991US4994770 Tone control device
02/19/1991US4994759 Current equalizing circuit
02/19/1991US4994757 Efficiency improvement of power amplifiers
02/19/1991US4994756 Circuit arrangement for amplifying a television signal
02/13/1991EP0412392A2 Amplifier for radio transmitter having controllable output power
02/12/1991US4992758 Power amplifying apparatus for optical disk apparatus
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