| Patents for H03G 3 - Gain control in amplifiers or frequency changers (20,162) |
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| 03/31/1999 | EP0904633A1 Power delivery system and method of controlling the power delivery system for use in a radio frequency system |
| 03/31/1999 | EP0559840B1 High dynamic range closed loop automatic gain control circuit |
| 03/31/1999 | CN1212596A Transmission power control device capable of varying transmission power at wide rance |
| 03/31/1999 | CN1212529A Peak-hold circuit and infrared communication device provided with such circuit |
| 03/31/1999 | CN1042784C Method and device for amplifying |
| 03/30/1999 | US5890059 Impulse noise blanking apparatus |
| 03/30/1999 | US5889821 Low noise front-end blanking and interleaving for satellite reception in pulsed interference environments |
| 03/30/1999 | US5889432 Two-stage differential microwave amplifier with bias current sharing and automatic gain control |
| 03/25/1999 | WO1999014873A1 Optical amplifier with gain adjustment |
| 03/25/1999 | WO1998056108A3 Automatic gain control circuit, e.g. for use in a hard disk drive |
| 03/24/1999 | EP0903914A1 Cordless telephone system and method |
| 03/24/1999 | EP0903751A2 Peak-hold circuit and an infrared communication device provided with such a circuit |
| 03/24/1999 | EP0903010A1 Method and apparatus for dynamic automatic gain control when pilot signal is lost |
| 03/24/1999 | CN1212100A Voice enhancement system and method |
| 03/24/1999 | CN1211735A Method of and apparatus for organism measurement |
| 03/23/1999 | US5887246 Amplifier circuit for an intermediate-frequency signal of a radio receiver |
| 03/23/1999 | US5886581 Automatic output offset control for a DC-coupled RF amplifier |
| 03/23/1999 | US5886575 Apparatus and method for amplifying a signal |
| 03/18/1999 | WO1999013570A1 Method and apparatus for controlling signal amplitude level |
| 03/17/1999 | EP0901721A1 Device and method for radio transmitters |
| 03/17/1999 | CN1211141A TV receiver having analog/digital dual tuner |
| 03/16/1999 | US5884153 Delayed automatic gain control circuit |
| 03/16/1999 | US5884152 Automatic gain control with constant gain coefficient during mobile's receive time slot |
| 03/16/1999 | US5884151 Switching device for short time mute switching of reproduction of NF-signal in radio receiver |
| 03/16/1999 | US5884149 Mobile station having dual band RF detector and gain control |
| 03/16/1999 | US5883963 Method of adjusting the volume and the loudness in an audio device |
| 03/11/1999 | DE19736660C1 Regulation circuit for power amplifier linearisation |
| 03/10/1999 | EP0901224A2 Method and apparatus for automatic gain control using a linear limiter circuit with voltage controlled resistors as a variable element |
| 03/10/1999 | EP0901223A2 Receiver for mobile telephones |
| 03/10/1999 | EP0901222A2 Fading compensation circuit |
| 03/10/1999 | EP0901219A2 Dynamic power allocation system and method for multi-beam satellite amplifiers |
| 03/10/1999 | EP0873589A4 Methods and apparatus for signal amplitude control systems |
| 03/10/1999 | CN1210424A 自动增益控制 AGC |
| 03/10/1999 | CN1210403A Gain measuring apparatus of multi-channel optical fiber anplifier |
| 03/10/1999 | CN1210394A Reduction of excessive spectral power distribution from class-C saturated amplification of pulsed-carrier signal |
| 03/09/1999 | US5881373 Muting a microphone in radiocommunication systems |
| 03/09/1999 | US5881101 Burst serial tone waveform signaling method and device for squelch/wake-up control of an HF transceiver |
| 03/09/1999 | US5880635 Apparatus for optimizing the performance of a power amplifier |
| 03/09/1999 | US5880629 Demodulator having variable gain amplifier and A/D converter controlled by signal level |
| 03/08/1999 | CA2246135A1 Method and apparatus for automatic gain control using a linear limiter circuit with voltage controlled resistors as a variable element |
| 03/04/1999 | WO1999010977A2 Amplifier with controllable output current |
| 03/04/1999 | WO1998057442A3 An arrangement and a method relating to a radio unit |
| 03/03/1999 | EP0899872A2 Variable-gain amplifier circuit and attenuator circuit |
| 03/03/1999 | EP0898934A1 Method and apparatus for measuring vital tissue |
| 03/03/1999 | CN1209688A Linear regulation device for amplifying circuit |
| 03/02/1999 | US5878089 Coherent signal detector for AM-compatible digital audio broadcast waveform recovery |
| 02/25/1999 | WO1999009664A1 Modular transceiver system and identification of modules therein |
| 02/24/1999 | EP0897691A2 Method of and apparatus for organism measurement |
| 02/24/1999 | CN1209032A Portable telephone device |
| 02/24/1999 | CN1208990A Method of and apparatus for measuring vital tissue |
| 02/24/1999 | CN1042269C Reference valtage generator with CMOS transistor |
| 02/23/1999 | US5874860 High frequency amplifier and control |
| 02/23/1999 | US5874857 Amplifier stage with dB-linear output voltage |
| 02/23/1999 | US5873838 Sensitivity setting devices and electrocardiographs including the sensitivity setting devices |
| 02/23/1999 | CA2160960C Method and device for controlling output power of a power amplifier |
| 02/23/1999 | CA2009476C Differential amplifier using voltage level shifting to achieve rail-to-rail input capability at very low power supply voltage |
| 02/18/1999 | DE19736699A1 Automatic volume control for loudspeaker dependent on ambient interference noise |
| 02/17/1999 | CN2308210Y Movable connection of wire conduit |
| 02/17/1999 | CN1208283A Method and apparatus for amplifying signal |
| 02/16/1999 | US5872854 Device and method for multi-processing EVR adjustment |
| 02/16/1999 | US5872852 Noise estimating system for use with audio reproduction equipment |
| 02/16/1999 | US5872481 Efficient parallel-stage power amplifier |
| 02/16/1999 | CA2139047C Combining circuit for a diversity receiving system |
| 02/11/1999 | WO1999007068A1 A method and apparatus for controlling gain of a power amplifier |
| 02/10/1999 | EP0896439A2 Transmission power control device capable of varying a transmission power at a wide range |
| 02/10/1999 | CN1207610A Automatic microwave gain control device |
| 02/09/1999 | US5869986 Power level sense circuit |
| 02/04/1999 | WO1999005840A1 Method and apparatus for automatically adjusting speaker and microphone gains within a mobile telephone |
| 02/04/1999 | WO1999005781A1 Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal |
| 02/04/1999 | WO1998052298A3 Method for adjusting power of transmitter, and control arrangement |
| 02/04/1999 | CA2297734A1 Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal |
| 02/03/1999 | EP0895352A1 Method and device of controlling the envelope of a radiosignal |
| 02/03/1999 | EP0895351A2 Automatic microwave gain control device |
| 02/03/1999 | EP0895350A1 Low power gain controlled amplifier with high dynamic range |
| 02/03/1999 | CN1206985A Method and device for automatic compensating sound volume |
| 02/02/1999 | US5867778 Switched gain element |
| 02/02/1999 | US5867777 Variable-gain amplifier circuit, offset control method in variable-gain amplifier circuit, radio receiver with variable-gain amplifier circuit, and radio receiving method in radio receiver with variable-gain amplifier |
| 02/02/1999 | US5867539 Methods and apparatus for reducing the effect of impulse noise on receivers |
| 02/02/1999 | US5867514 Laser wavelength control circuit having automatic DC offset and gain adjustment |
| 02/02/1999 | US5867063 Gain distribution circuit |
| 02/02/1999 | US5867060 Power delivery system and method of controlling the power delivery system for use in a radio frequency system |
| 02/02/1999 | CA2164323C Temperature compensated variable gain amplifier |
| 02/02/1999 | CA2081353C Pulse noise detecting circuit of am receiver |
| 01/28/1999 | WO1999004487A1 Signal-processing device |
| 01/27/1999 | CN1206515A Efficient parallel-stage power amplifier |
| 01/26/1999 | US5864750 Microcomputer-based carrier detection system for a cordless telephone by comparing an output signal which contains signals no higher in frequency with a frequency threshold value |
| 01/26/1999 | US5864591 Apparatus and method for suppression of feedback in a communications receiver |
| 01/26/1999 | US5864416 Tuning optical communications receiver by controlling drain current input to variable transconductance fet stage of variable bandwidth transimpedance amplifier |
| 01/21/1999 | WO1999003259A2 Method and apparatus for controlling a telephone ring signal |
| 01/21/1999 | WO1999003199A1 Voice signal processor |
| 01/21/1999 | WO1999003198A1 Volume control method and device for a loudspeaker element, hand free device and device for installation inside a vehicle |
| 01/21/1999 | WO1998048510A3 An arrangement and method relating to signal power amplification |
| 01/21/1999 | DE19740743C1 Optical amplifier with gain control |
| 01/20/1999 | EP0891652A1 Method for automatically adjusting audio response for improved intelligibility |
| 01/20/1999 | CN1041784C Audio level equalization of television sound, broad cast FM and national weather service FM radio signals |
| 01/19/1999 | US5862465 Hysteresis-free anti-saturation circuit |
| 01/19/1999 | US5862461 Transmitting apparatus and method of adjusting gain of signal to be transmitted, and receiving apparatus and method of adjusting gain of received signal |
| 01/19/1999 | US5862460 Power control circuit for a radio frequency transmitter |
| 01/19/1999 | US5862236 Method and apparatus for controlling volume of a speaker |
| 01/19/1999 | US5861777 Method and apparatus for compensation of phase distortion in power amplifiers |