| Patents for H03G 3 - Gain control in amplifiers or frequency changers (20,162) |
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| 02/12/1991 | US4992753 Power amplifier for a radio frequency signal |
| 02/07/1991 | WO1991001592A1 Automatic gain control circuit |
| 02/06/1991 | EP0411756A2 Radio telephone receiver with gain control |
| 02/05/1991 | US4991227 Squelch circuit with variable squelch tail and variable hysteresis |
| 01/30/1991 | EP0410629A2 Automatic signal parameter control |
| 01/30/1991 | EP0410399A2 Video preamplifier circuit |
| 01/30/1991 | EP0277978A4 Adaptive gain control amplifier |
| 01/29/1991 | US4989243 Use in a public telephone |
| 01/29/1991 | US4989074 Digital automatic gain control apparatus |
| 01/24/1991 | DE3923447A1 Radio and TV studio equipment showing subjective sound level - supplies instantaneous programme audio signal as mono signal to frequency evaluating circuit using frequency response of human hearing |
| 01/23/1991 | EP0409259A2 Equalizing and amplifying circuit in an optical signal receiving apparatus |
| 01/22/1991 | US4987383 Integrated compression amplifier having programmable threshold voltage |
| 01/22/1991 | US4987380 Gain controlled amplifier circuit |
| 01/16/1991 | EP0408323A2 Discrete increment signal processing system and method using parallel branched N-state networks |
| 01/09/1991 | EP0407260A1 Gain matching apparatus for the reception of radio communication signals |
| 01/09/1991 | EP0407135A2 Apparatus for controlling transmission output level for burst signal |
| 01/09/1991 | EP0406852A2 Automatic gain control method and appartus in optical disk system |
| 01/08/1991 | US4984079 Video preamplifier circuit |
| 01/08/1991 | US4983928 Controllable amplifier circuit |
| 01/08/1991 | US4983927 Integrated audio amplifier with combined regulation of the "mute" and "standby" functions and the switching transients |
| 01/03/1991 | DE4019850A1 Fast response AGC HF amplifier - maintains constant level using regulating capacitor between control input and reference potential |
| 01/02/1991 | EP0405541A2 Noise suppression apparatus for FM receiver |
| 01/02/1991 | EP0405445A2 Output waveform control circuit |
| 01/02/1991 | CN1011106B Radio receiver having wide-band automatic gain controlling circuit |
| 12/27/1990 | WO1990016125A1 Direct conversion receiver for digital signals and method for demodulation of said signals |
| 12/27/1990 | EP0404601A2 An automatic gain control system |
| 12/27/1990 | EP0404294A1 Levelling control circuit |
| 12/25/1990 | US4980810 VHF DC-DC power supply operating at frequencies greater than 50 MHz |
| 12/19/1990 | EP0403247A2 AGC device for producing a gain controlled and d.c. offset removed signal |
| 12/19/1990 | EP0402715A2 Car radio |
| 12/18/1990 | US4978926 Audio limiter using voltage multiplexed feedback |
| 12/18/1990 | CA1277921C Digital signal gain control circuitry for varying digital signals in substantially equal db steps |
| 12/13/1990 | DE3918386A1 Amplifying factor adjustment circuit for IF amplifier - selects control signal for each reception range for receiver tuning and stores control signal |
| 12/12/1990 | EP0401545A1 Power control arrangement |
| 12/12/1990 | EP0401244A1 Radio receiver for vehicles |
| 12/11/1990 | US4977590 Signal level expansion apparatus as for a telecommunications system |
| 12/05/1990 | EP0401013A2 High frequency amplifier circuit capable of optimizing a total power consumption |
| 12/05/1990 | EP0400218A2 Recording medium playing apparatus with automatic tonal response setting function |
| 12/04/1990 | US4975964 For protecting a child's clothes during feeding |
| 12/04/1990 | US4975963 Muting circuit |
| 12/04/1990 | US4975953 Combined deemphasis circuit and noise blanker |
| 12/04/1990 | US4975657 Speech detector for automatic level control systems |
| 11/29/1990 | WO1990014718A1 Method and apparatus for reducing intermodulation distortion |
| 11/28/1990 | EP0399561A2 VHF DC-DC power supply |
| 11/28/1990 | EP0399307A2 Autoradio |
| 11/27/1990 | US4973938 Signal level adjuster |
| 11/27/1990 | CA1276994C Automatic gain control in a digital signal processor |
| 11/27/1990 | CA1276985C Rf power control circuit |
| 11/22/1990 | EP0398039A2 An attenuator circuit |
| 11/20/1990 | US4972510 Method and apparatus for squelching dependent on detected bond rate to reduce unwanted audible noise on a mixed voice data channel |
| 11/20/1990 | US4972440 Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals |
| 11/20/1990 | US4972353 Radio-frequency transformer providing automatic gain control and overload protection |
| 11/20/1990 | US4972098 Integrated variable resistor circuit having MOS transistors |
| 11/15/1990 | DE4007572A1 Acoustic device for tuner |
| 11/14/1990 | EP0397445A2 Procedure for forming low power levels in a radio telephone transmitter |
| 11/14/1990 | EP0397444A2 Circuitry for widening the effective range of a transmitter |
| 11/14/1990 | EP0397401A2 Circuit for forming low power levels in a transmitter of a radio telephone |
| 11/14/1990 | EP0397265A1 Bipolar transistor arrangement with distortion compensation |
| 11/07/1990 | EP0396347A2 Radio transmitter capable of compensating for a frequency characteristic of an antenna and/or a coupling circuit |
| 11/07/1990 | EP0395894A2 Electronic circuit for analog multiplication, differential amplification or charge accumulation |
| 11/07/1990 | EP0395850A2 Amplifier with digital gain control |
| 11/06/1990 | US4969207 Radio receiver with reception deterioration compensation |
| 11/01/1990 | WO1990013173A1 High-frequency amplifier of a radio transmitter |
| 10/30/1990 | US4967163 Regulating fluctuating input electrical signals |
| 10/28/1990 | WO1990013174A1 Digital signal processor based agc |
| 10/24/1990 | EP0393842A2 Closed-loop audio attenuator |
| 10/23/1990 | US4965854 Noise blanker with continuous wave interference compensation |
| 10/23/1990 | US4965835 Signal sensing circuit |
| 10/23/1990 | CA1275458C Amplifier circuit having high-speed raising time |
| 10/18/1990 | WO1990012463A1 Spread spectrum-time diversity communications systems and transceivers for multidrop local area networks |
| 10/16/1990 | US4964108 Volume control for sound reproducing apparatus |
| 10/10/1990 | CN1046072A Amplifying electric circuit with auto-gain-controlling function |
| 10/09/1990 | US4962545 Volume level retention in a pager |
| 10/09/1990 | US4962494 Optical disk playback device having automatic volume control |
| 10/03/1990 | EP0390360A2 A method for changing the operating class of a transmitter |
| 10/03/1990 | EP0389569A1 Circuit arrangement with adjustable active and/or passive components. |
| 10/03/1990 | EP0223854B1 Rf input drive saturation control loop |
| 09/29/1990 | WO1990011666A1 Radio with message reception indicator |
| 09/26/1990 | EP0389383A2 Circuit and procedure for detecting an electric current flow in a MOS-transistor |
| 09/26/1990 | EP0388802A2 Error amplifier for use with parallel operated autonomous current or voltage regulators using transconductance type power amplifiers |
| 09/26/1990 | EP0388552A2 Receiver |
| 09/26/1990 | EP0388490A1 Level control circuits |
| 09/25/1990 | US4959867 Audiometer attenuation method and apparatus |
| 09/19/1990 | EP0388369A2 Intergrated circuit for generating a temperature independent, dynamically compressed voltage, function of the value of an external regulation resistance |
| 09/11/1990 | US4956616 Muting circuit for audio amplifiers |
| 09/06/1990 | DE3906734A1 Method for mixing audio signals |
| 09/05/1990 | EP0385782A2 Time dependent, variable amplitude threshold output circuit for frequency variant and frequency invariant signal discrimination |
| 09/05/1990 | EP0384920A1 Circuit for digitally adjusting the gain of a digitally adjustable receiver amplifier |
| 09/04/1990 | US4955078 Frequency difference detector (FDD) having automatic gain control and a carrier modulated receiver including the FDD |
| 09/04/1990 | US4955077 Radio with broad band automatic gain control circuit |
| 08/29/1990 | EP0384501A1 Variable resistor in MOS-technology |
| 08/28/1990 | US4953222 Multiple channel gated amplifier system |
| 08/28/1990 | US4953221 Constant power ratio automatic gain control |
| 08/28/1990 | US4952886 Controllable gain amplifying circuit |
| 08/28/1990 | US4952867 Base bias current compensator |
| 08/28/1990 | US4952795 Current limiter and an optical receiver making use thereof |
| 08/22/1990 | CN1044881A Differential amplifier using voltage level shifting to achieve rail-to-rail input capability at very low power supply voltage |
| 08/21/1990 | USRE33309 Telephone handset amplifier circuit |
| 08/21/1990 | CA1273097A1 Hearing aid noise suppression system |
| 08/16/1990 | EP0382373A2 Nonlinear noninverting transimpedance amplifier |