| Patents for H03G 3 - Gain control in amplifiers or frequency changers (20,162) |
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| 05/10/1994 | US5311143 RF amplifier bias control method and apparatus |
| 05/10/1994 | US5311087 Noise removing circuit |
| 05/10/1994 | CA2021380C Equalizing and amplifying circuit in an optical signal receiving apparatus |
| 05/05/1994 | DE4237005A1 Reducing differences in sound level at receiver - comparing characteristic vol. of currently received programme signal with that of programme signal to be received |
| 05/03/1994 | US5309443 Dynamic muting method for ADPCM coded speech |
| 05/03/1994 | US5309115 Burst control circuit for use in TDMA communications system |
| 05/03/1994 | CA2063403C Gain/phase compensation for linear amplifier feedback loop |
| 04/27/1994 | EP0594358A2 Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems |
| 04/27/1994 | EP0594352A2 Circuitry for minimizing peak power in an amplifier carrying a plurality of signals of differing frequencies |
| 04/27/1994 | EP0594063A2 Sound reproduction system |
| 04/26/1994 | US5307512 Power control circuitry for achieving wide dynamic range in a transmitter |
| 04/26/1994 | US5307379 Automatic noise characterization for optimally enabling a receiver |
| 04/26/1994 | US5307026 Variable gain RF amplifier with linear gain control |
| 04/26/1994 | US5306960 Common bias circuit for a plurality of discrete IC's each having their own bias circuritry |
| 04/20/1994 | CN1024309C Method for detecting and correcting saturation of power amplifier and apparatus thereof |
| 04/19/1994 | US5305109 Parallel untuned video if amplifiers supplied signals from TV 1st detector via respective input filters |
| 04/19/1994 | US5304948 RF amplifier with linear gain control |
| 04/19/1994 | US5304947 Arrangement for eliminating offset errors in a power control circuit of a pulsed transmitter final amplifier |
| 04/19/1994 | US5304946 Amplifier circuit having an operation point maintaining input and output voltages constant even if a gain thereof is varied |
| 04/19/1994 | CA2049343C Radio with message reception indicator |
| 04/13/1994 | CN1085375A Switched signal processing circuit |
| 04/12/1994 | US5303415 Pulse noise detecting circuit of AM receiver |
| 04/12/1994 | US5303414 Method and device for minimizing interference, in particular in connection with FM reception |
| 04/12/1994 | US5303409 Automatically compensated squelch circuit |
| 04/12/1994 | US5303408 Squelch detector |
| 04/12/1994 | US5303407 Digital squelch tail circuit for two-way radio communication systems |
| 04/12/1994 | US5303406 Noise squelch circuit with adaptive noise shaping |
| 04/12/1994 | US5303405 Comparator switched squelch rectifier |
| 04/12/1994 | US5303395 Power control with a constant gain amplifier for portable radio transceivers |
| 04/12/1994 | US5303371 Electronic volume control system |
| 04/12/1994 | US5303268 Automatic power control apparatus |
| 04/12/1994 | US5302914 Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems |
| 04/12/1994 | US5302913 Power amplifying circuit capable of producing an output signal having a desired waveform |
| 04/12/1994 | US5302860 Transmission system |
| 04/06/1994 | EP0590706A1 Amplifier apparatus |
| 04/06/1994 | EP0590516A1 Voltage controlled device |
| 04/05/1994 | US5301364 Method and apparatus for digital automatic gain control in a receiver |
| 04/05/1994 | US5300894 Circuitry for minimizing peak power in an amplifier carrying a plurality of signals of differing frequencies |
| 04/05/1994 | US5300892 Audio signal amplifier circuit |
| 04/05/1994 | US5300834 Circuit with a voltage-controlled resistance |
| 04/05/1994 | US5300826 Interface circuit for audio signal |
| 04/02/1994 | CA2343560A1 Sound processing apparatus |
| 03/31/1994 | WO1994007306A1 Method and device for automatic gain control in an amplifier of an electroacoustic system, particularly for motor vehicules |
| 03/31/1994 | WO1994007305A1 Noise adaptive automatic gain control circuit |
| 03/30/1994 | EP0589574A1 An amplifier control system |
| 03/30/1994 | EP0589228A1 HF power amplifier |
| 03/29/1994 | US5299267 Operating apparatus of an audio mixer |
| 03/29/1994 | US5299233 Apparatus and method for attenuating a received signal in response to presence of noise |
| 03/29/1994 | US5298868 Gain control amplifier |
| 03/29/1994 | US5298806 Integrated circuit and gate array |
| 03/29/1994 | US5298798 Amplitude control device |
| 03/24/1994 | CA2105027A1 Amplifier control system |
| 03/23/1994 | EP0588424A1 Buest control in a power amplifier for a TDMA communication system |
| 03/23/1994 | EP0588206A1 Method and apparatus for producing a control signal |
| 03/23/1994 | EP0587965A1 Differential transconductance stage, dynamically controlled by the input signal's amplitude |
| 03/23/1994 | EP0253902B1 Noise reduction apparatus and method |
| 03/22/1994 | US5297213 System and method for reducing noise |
| 03/22/1994 | US5297184 Gain control circuit for synchronous waveform sampling |
| 03/22/1994 | US5296821 Method and apparatus for controlling transient responses in a power amplifier |
| 03/22/1994 | US5296697 Detection circuit for maintaining constant signal transfer characteristics of a light-sensitive detector |
| 03/22/1994 | CA2031580C General purpose low cost digital amplitude regulator |
| 03/22/1994 | CA2031542C Low cost digital amplitude regulator |
| 03/17/1994 | WO1994006244A1 Variable gain amplifier |
| 03/17/1994 | DE4230231A1 Level regulation device for TV receiver - uses level control signal extracted from TV signal to control digitally controlled resistance. |
| 03/16/1994 | CN1083998A 可变增益放大器 Variable gain amplifier |
| 03/15/1994 | US5295178 Digital signal processor for radio base station |
| 03/10/1994 | DE4233475A1 Tone component muting circuit for TV receiver - uses switched voltage divider stage between successive stages of audio signal circuit |
| 03/09/1994 | EP0586021A1 Digital noise shaper circuit |
| 03/09/1994 | EP0585755A1 Apparatus and method providing a MOS temperature compensated voltage reference for low voltages and wide voltage ranges |
| 03/08/1994 | US5293407 Digital modulator with digital power control circuit |
| 03/08/1994 | US5293139 CMOS-compander |
| 03/02/1994 | EP0584718A1 Switched signal processing circuit |
| 03/01/1994 | US5291558 Automatic level control of multiple audio signal sources |
| 03/01/1994 | US5291150 Control circuitry for an RF signal amplifier |
| 03/01/1994 | US5291123 Precision reference current generator |
| 02/24/1994 | DE4227680A1 FM receiver with RDS evaluator - has control determining difference between two frequencies, and matching times for various frequency differences |
| 02/23/1994 | EP0583966A1 Automatic gain control |
| 02/23/1994 | EP0583492A1 Audio signal bass frequency enhancement device |
| 02/22/1994 | US5289546 Apparatus and method for smooth audio scaling |
| 02/16/1994 | EP0582578A1 A method and a device for controlling a radio transmitter |
| 02/15/1994 | US5287555 Power control circuitry for a TDMA radio frequency transmitter |
| 02/10/1994 | DE4326746A1 Stereo loudspeaker vol. control equipment responsive to ambient noise - provides feedback from both audio channel amplifiers via adaptive digital filters for subtraction from noise microphone signal |
| 02/10/1994 | DE4225821A1 HF signal level adjustment control - has extra controllable converter stage between coupling stage and detector, forming preset magnitude envelope curve modulation |
| 02/09/1994 | CN1081794A RF amplifier bias control method and apparatus |
| 02/08/1994 | US5285169 Monolithic integrated differential amplifier with digital gain setting |
| 02/03/1994 | WO1994003002A1 Frequency hopping time-diversity communications systems and transceivers for local area networks |
| 02/03/1994 | WO1994002934A1 Semiconductor emulation of vacuum tubes |
| 02/02/1994 | CN1023668C Bidirectional dc power controller with fault protection |
| 02/01/1994 | US5283536 High dynamic range closed loop automatic gain control circuit |
| 02/01/1994 | US5283533 Amplifier signal level detector for a mobile communication system |
| 02/01/1994 | CA2032150C Digital signal processor based agc |
| 01/26/1994 | EP0580089A1 Receiver for optical signals, with a preamplifier providing dc-offset correction, and a dual mode transimpedance amplifier |
| 01/26/1994 | CN1081305A Method and device for amplifying |
| 01/25/1994 | CA1326514C Automatic electrical power control circuit |
| 01/20/1994 | WO1994001930A1 Rf amplifier bias control method and apparatus |
| 01/20/1994 | WO1994001929A1 Method and apparatus for controlling amplifier power |
| 01/20/1994 | WO1994001810A1 Low cost controller |
| 01/18/1994 | US5280643 Sensitivity switching circuit for radio receiver |
| 01/12/1994 | EP0578389A2 Audio amplifier circuit and method of operation |
| 01/12/1994 | EP0578337A1 Microwave absorber attenuator for linear SSPA power control |