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)
06/1999
06/15/1999US5912977 Distortion suppression in hearing aids with AGC
06/15/1999US5912588 Gain control circuit for a linear power amplifier
06/15/1999CA2176551C Method and apparatus for amplifying a signal
06/10/1999WO1999029056A2 Optical receiver
06/10/1999WO1999029047A1 Method and apparatus for increasing receiver immunity to interference
06/10/1999WO1999017248A8 Optical sensor system for a bill validator
06/10/1999CA2275115A1 Method and apparatus for increasing receiver immunity to interference
06/09/1999EP0921635A1 Power amplifier device
06/09/1999EP0920766A1 Receiver with controllable amplifier means
06/09/1999EP0722625A4 Feedforward amplifier for minimizing distortion
06/09/1999EP0640257B1 Photodiode preamplifier with programmable gain amplification
06/09/1999CN1219302A Alinearizer for linearizing a non-linear component controlled by control voltage
06/09/1999CN1219026A Reducing power protection circuit for electronic device
06/09/1999CA2224261A1 Low phase noise, high q, high gain amplifier in an integrated circuit
06/08/1999US5910996 Dual audio program system
06/08/1999US5910751 Circuit arrangement and method with temperature dependent signal swing
06/02/1999EP0920126A2 Method and apparatus for adaptively controlling the gain of an amplifier
06/02/1999EP0919082A1 A differential amplifier, an integrated circuit, and a telephone
06/02/1999CN1218330A Gain control method and circuit
06/01/1999US5909645 Receiver with dynamic attenuation control for adaptive intermodulation performance enhancement
06/01/1999US5909643 Transmitter power varying device having a bypass line for a power amplifier
06/01/1999US5909415 Positioning control system which generates a servo-error signal in accordance with a difference between detection currents
06/01/1999US5909145 Variable control of electronic power supplies
05/1999
05/25/1999US5907823 Method and circuit arrangement for adjusting the level or dynamic range of an audio signal
05/25/1999US5907798 Wireless telephone intermodulation performance enhancement techniques
05/25/1999US5907622 Automatic noise compensation system for audio reproduction equipment
05/25/1999US5907261 Method and apparatus for controlling signal amplitude level
05/20/1999WO1999025150A1 Audio system comprising audio signal processing circuit
05/20/1999WO1999025072A2 Control method and control arrangement
05/20/1999WO1999025064A1 Dualband power amplifier control using a single power amplifier controller
05/19/1999EP0917286A2 Method and apparatus for providing a squelch function on narrow band radio receivers
05/19/1999EP0916184A2 Automatic gain control circuit, e.g. for use in a hard disk drive
05/19/1999EP0916183A1 Improved transimpedance amplifier
05/19/1999CN1217099A Hybrid analog/digital method and apparatus for controlling transmission power level of a radio transceiver
05/18/1999US5905962 Apparatus and method for data transmission to inhibit radio signal fading with sequential transmission of data groups based upon power levels
05/18/1999US5905802 Dual action automatic sound level control
05/14/1999WO1999023762A1 Reconfigurable radio system architecture
05/14/1999WO1999023761A1 A field programmable radio frequency communications equipment including a configurable if circuit and method therefor
05/14/1999WO1999023760A1 Receiver for a reconfigurable radio system and method therefor
05/14/1999CA2306846A1 Reconfigurable radio system architecture
05/14/1999CA2306842A1 Receiver for a reconfigurable radio system and method therefor
05/14/1999CA2306835A1 A field programmable radio frequency communications equipment including a configurable if circuit and method therefor
05/12/1999EP0915563A2 Automatic gain control
05/12/1999DE19731034A1 Ambient sound-responsive muting circuit for in-car audio system
05/11/1999US5903854 High-frequency amplifier, transmitting device and receiving device
05/11/1999US5903853 Radio transceiver including noise suppressor
05/11/1999US5903504 Op amp circuit with variable resistance and memory system including same
05/11/1999US5903193 Amplifying device and transmission output control apparatus
05/11/1999US5903192 Arrangement for controlling the output amplitude of a high frequency power amplifier
05/11/1999US5903191 Digitally controlled variable transconductance amplifier system
05/06/1999WO1999022446A1 Improved power control of rf signals
05/06/1999WO1999022366A2 Improved audio reproduction arrangement and telephone terminal
05/06/1999WO1999010977A3 Amplifier with controllable output current
05/06/1999EP0913934A2 Receiving Apparatus
05/06/1999EP0913933A2 Device for controlling the amplification of a radiofrequency amplifier
05/04/1999US5901347 Fast automatic gain control circuit and method for zero intermediate frequency receivers and radiotelephone using same
05/04/1999US5901179 Waveform shaping method and equipment
05/04/1999US5901173 Noise Estimator
05/04/1999US5900782 AGC voltage correction circuit
05/04/1999US5900781 Multistage variable gain amplifier circuit
04/1999
04/29/1999WO1998045955A3 Serial digital data communications receiver with automatic cable equalizer, agc system, and dc restorer
04/28/1999EP0912000A2 Optical signal receiving circuit and method for receiving optical signal
04/28/1999CN1215251A 信号电平调整回路 Signal level adjustment circuit
04/27/1999US5898912 Direct current (DC) offset compensation method and apparatus
04/27/1999US5898699 Digital broadcast receiver and signal level display method
04/27/1999US5898340 High power efficiency audio amplifier with digital audio and volume inputs
04/27/1999US5898337 Output signal level control circuit using different detecting sections in different output signal levels
04/22/1999DE19745949A1 Arrangement for limiting loudness in a room, e.g. for use at concerts
04/22/1999DE19742714A1 Variable gain amplifier with complementary setting elements
04/21/1999EP0909479A1 Differential pair gain control stage
04/21/1999CN1043110C Apparatus for virtual expansion of power supply capacity
04/20/1999US5896576 Audio mute for digital cordless telephone
04/20/1999US5896458 Sticky leveler
04/20/1999US5896451 Adaptive telephone interface
04/20/1999US5896449 Voice enhancement system and method
04/20/1999US5896423 Spread spectrum signal receiver
04/20/1999US5896261 Power down protection circuit for an electronic device
04/20/1999US5896064 Gain controller for variable-gain amplifier
04/20/1999US5896063 Variable gain amplifier with improved linearity and bandwidth
04/20/1999CA2160750C Method and apparatus for increasing amplifier efficiency
04/14/1999EP0909022A2 Gain control circuit
04/14/1999EP0908007A2 Radio receiver and controllable amplifier circuit
04/14/1999EP0908006A1 Bias circuit for a power amplifier
04/13/1999US5894522 Distortion reduction system
04/08/1999WO1999017462A1 Method for managing power supply to a cellular radiotelephone station
04/08/1999WO1999017444A1 Multi-layer carrier module for power amplifier
04/08/1999WO1999017443A1 Apparatus and method for amplifying a signal
04/08/1999WO1999017442A1 Dynamic volume control system and method
04/08/1999WO1999017248A1 Optical sensor system for a bill validator
04/08/1999CA2271746A1 Optical sensor system for a bill validator
04/07/1999EP0907276A1 Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
04/07/1999EP0907239A1 Transmitter for radiotelephone terminal and corresponding terminal
04/07/1999EP0754376A4 Apparatus and method for reducing errors in data caused by noise through the use of blanking
04/07/1999CN1213465A Tuning amplifier
04/06/1999US5892835 Volume controller using encoder
04/06/1999US5892834 Audio level dynamic range compression
04/06/1999US5892396 Method and apparatus for controlling gain of a power amplifier
04/02/1999CA2246002A1 Transmitter for radiotelephone terminal and corresponding terminal
04/01/1999WO1999003259A3 Method and apparatus for controlling a telephone ring signal
03/1999
03/31/1999EP0905884A2 Radio frequency transmitter
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