| Patents for H03G 3 - Gain control in amplifiers or frequency changers (20,162) |
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| 07/13/1989 | DE3743766A1 Optical receiver |
| 07/13/1989 | DE3743765A1 Optical receiver |
| 07/11/1989 | US4847816 Audio information reproducing apparatus |
| 07/05/1989 | EP0323102A2 Recording medium reproducing device with automatic volume control |
| 06/28/1989 | EP0322382A2 Analog integrated circuit having intrinsic topologies and characteristics selectable by a digital control |
| 06/27/1989 | US4843345 Output stage with automatic level control for power line signalling |
| 06/14/1989 | EP0319777A2 Process and circuitry to automatically control sound level depending on ambient noise |
| 06/13/1989 | US4839611 Voltage controlled high-frequency attenuator |
| 06/06/1989 | CA1255379A1 Device for increasing the dynamic range of an amplification circuit in particular of an airborne mls receiver |
| 06/01/1989 | WO1989005062A1 Speaker volume control apparatus |
| 05/31/1989 | EP0317862A1 Device for enhancing hearing comfort by suppressing the transient phenomena in a reception chain of a narrow band FM/PM equipment, particularly in radiotelephony |
| 05/30/1989 | US4835652 Bi-directional DC power controller with fault protection |
| 05/30/1989 | US4835484 Gain control circuit for suppressing Larsen effect in a loudspeaker telephone |
| 05/30/1989 | CA1254960A1 Attenuator control arrangements |
| 05/30/1989 | CA1254958A1 Fm demodulators |
| 05/24/1989 | EP0316879A2 Radio with broad band automatic gain control circuit |
| 05/24/1989 | EP0316839A1 Listening comfort enhancer in the presence of carrier fading in an FM/PM narrow-band receiver |
| 05/23/1989 | US4833422 Programmable gain instrumentation amplifier |
| 05/18/1989 | WO1989004583A1 Adaptive, programmable signal processing hearing aid |
| 05/16/1989 | US4831400 Stop-down signal adjusting circuit in automatic aperture control camera |
| 05/16/1989 | US4831378 Analog-to-digital converting apparatus having an automatic gain control circuit |
| 05/10/1989 | EP0315199A2 Ultrasonic transducer and current loop transmitter |
| 05/09/1989 | US4829594 Adaptive correction of DC error transients |
| 05/09/1989 | US4829593 Automatic gain control apparatus |
| 05/09/1989 | US4829592 Circuit and method of suppressing inter-station radio tuning noise |
| 05/09/1989 | US4829270 Compansion system |
| 05/09/1989 | US4829172 Optical ranging by phase shift measurement with return signal level compensation |
| 05/03/1989 | EP0314510A2 Electronic volume device |
| 05/03/1989 | EP0314227A2 Wideband single-ended voltage-to current converter and gain-control circuit |
| 05/03/1989 | EP0314208A1 Frequency difference detector (FDD)having automatic gain control and a carrier modulated receiver including the FDD |
| 05/03/1989 | EP0313914A1 Circuit comprising an input amplifier connected to an opto-electrical transducer |
| 05/03/1989 | EP0313650A1 Microwave absorber attenuator for linear sspa power control. |
| 05/03/1989 | EP0185692B1 Process for reducing the noticeability of errors in a digital audio signal |
| 05/02/1989 | US4827458 Sound surge detector for alerting headphone users |
| 04/26/1989 | EP0312569A1 Method and apparatus for improving voice intelligibility in high noise environments. |
| 04/25/1989 | US4825176 Control amplifier |
| 04/25/1989 | US4823600 Ultrasonic transducer and current loop transmitter |
| 04/19/1989 | EP0311808A2 Method and circuit for noise compensation in microphones |
| 04/05/1989 | EP0310274A2 Digital signal processing apparatus |
| 03/29/1989 | EP0308628A2 Level setting circuit for audio signals |
| 03/29/1989 | EP0191784B1 Optical receiver circuit |
| 03/29/1989 | CN1032092A Speech circuit for telephone |
| 03/28/1989 | US4817198 Radio receiver |
| 03/28/1989 | US4817160 Amplifier with automatic gain control |
| 03/28/1989 | US4816772 Wide range linear automatic gain control amplifier |
| 03/28/1989 | US4816771 Amplifier arrangement for an adaptive reduction of an unwanted d.c. offset in an input signal and an AM receiver using same |
| 03/23/1989 | WO1989002683A1 A method of demultiplex processing of information and equipment for performing the method |
| 03/23/1989 | DE3729922A1 Radio link with device to improve the signal-to-noise ratio |
| 03/22/1989 | EP0308293A1 Controlled output power device for a class-C amplifier |
| 03/22/1989 | EP0307725A2 Noise-compensation circuit |
| 03/22/1989 | EP0307641A1 Noise reduction circuitry |
| 03/21/1989 | US4815118 Data converter for CT data acquisition system |
| 03/21/1989 | US4814724 Gain control circuit of current mirror circuit type |
| 03/21/1989 | US4814643 Comparison circuit |
| 03/14/1989 | US4812908 Automatic gain control circuit having a control loop including a current threshold circuit |
| 03/14/1989 | US4812781 Variable gain amplifier |
| 03/09/1989 | WO1989002198A1 Fm communications system with improved response to rayleigh-faded received signals |
| 03/09/1989 | WO1989002190A1 Automatic gain control system |
| 03/07/1989 | US4811423 SSB receiver with improved feedforward AGC |
| 03/07/1989 | US4811421 Transmission power control device in a radio communication transmitting/receiving station |
| 03/07/1989 | US4811384 Method for level regulation of message information |
| 03/07/1989 | US4811370 Digital muting circuit |
| 03/07/1989 | US4811195 Electronic control system with improved communications |
| 03/07/1989 | US4811018 Analog-to-digital conversion system having simultaneously auto-adjusted amplifier and attenuator |
| 03/07/1989 | US4810909 Amplifier circuit having high-speed raising time |
| 02/28/1989 | US4809339 Supplying power from a constantly available source |
| 02/28/1989 | US4808943 Switching circuit of amplifier output |
| 02/28/1989 | US4808810 Preamplifier for an optical receiver |
| 02/23/1989 | DE3742270C1 Control stage for a radio-frequency power amplifier |
| 02/21/1989 | US4807167 Rapid method of digital automatic gain control |
| 02/21/1989 | US4807035 Signal measurement |
| 02/21/1989 | US4806876 High frequency amplifier circuit |
| 02/14/1989 | US4805236 Method and arrangement for increasing the dynamic range at an input stage of an optical receiver |
| 02/14/1989 | US4804904 Voltage to current converters for use in an active filter and with a moise reduction circuit |
| 02/07/1989 | US4803440 Automatic electrical power control circuit |
| 01/31/1989 | US4802237 Solid state transmitter protector |
| 01/25/1989 | EP0300663A2 Optical ranging by phase shift measurement |
| 01/19/1989 | DE3722752A1 Device for setting, storing and fetching an arbitrary number of fixed and variable set quantities in electrical devices |
| 01/18/1989 | EP0298959A1 Fm receiver with noise suppression during rayleigh faded received signals. |
| 01/17/1989 | US4798950 Radiation characteristic measuring apparatus for laser diode |
| 01/10/1989 | US4797932 Speaker volume control apparatus and method |
| 01/10/1989 | US4797636 Radio receiver |
| 01/10/1989 | US4797633 Audio amplifier |
| 01/10/1989 | US4797632 Variable gain amplifier circuit and its use in an automatic gain control arrangement |
| 01/10/1989 | CA1248593A1 Squelch detecting circuit with squelch start determining means |
| 01/05/1989 | DE3814842A1 Self-adapting filter for measuring devices |
| 01/04/1989 | EP0298046A2 Device for measuring, indicating and controlling sound pressure (or sound levels) in an environment |
| 01/04/1989 | EP0297818A2 Data converter for imaging data acquisition system |
| 01/04/1989 | EP0195010B1 Automatic gain control circuit |
| 12/27/1988 | US4794343 Method and apparatus for calibrating and equalizing a multi-channel automatic gain control amplifier |
| 12/21/1988 | EP0295497A2 High-dynamics amplifier stage with distortion detection |
| 12/20/1988 | US4792991 FM receiver having improved audio quality in response to Rayleigh faded received signals |
| 12/20/1988 | US4792990 Audio amplifier with programmed volume control |
| 12/20/1988 | US4792977 Hearing aid circuit |
| 12/15/1988 | DE3814843A1 Control logic for adaptation to the amplitude of a noise signal |
| 12/13/1988 | US4791385 Voltage controlled amplifier for symmetrical electrical signals |
| 12/06/1988 | US4790019 Remote hearing aid volume control |
| 12/06/1988 | US4789841 Circuit arrangement for noise reduction at the minimum volume setting of an amplifier |
| 12/06/1988 | US4789777 Photelectric amplifier having plural actuable feedback paths |
| 12/06/1988 | CA1246253A1 Fsk or fm burst signal generating apparatus |