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)
11/2000
11/21/2000US6151509 Dual band cellular phone with two power amplifiers and a current detector for monitoring the consumed power
11/21/2000US6151400 Automatic sensitivity control
11/15/2000EP1052832A1 Receiving section of a telephone
11/15/2000EP1052831A1 A receiving section of a telephone with suppression of interference upon switching on/off
11/15/2000EP1052777A2 Amplifying circuit device
11/15/2000EP1052771A2 A high frequency signal amplifying circuit and a receiver using the same
11/15/2000EP1051809A1 Apparatus and method for receiving a wideband communication signal in a wireless communication system
11/15/2000EP0954823A4 Optical sensor system for a bill validator
11/14/2000US6148220 Battery life extending technique for mobile wireless applications
11/14/2000US6148189 AGC circuit arrangement for a tuner
11/07/2000US6144936 Method for substituting bad speech frames in a digital communication system
11/07/2000US6144845 Method and circuit for image rejection
11/07/2000US6144842 Radio frequency level control circuit with reduced supply voltage
11/07/2000US6144254 Low-noise amplifier with switched gain and method
11/02/2000WO2000065758A1 Base station device and method of suppressing peak current
11/02/2000WO2000065728A1 Apparatus and method for power control
11/02/2000EP1049251A2 Control device
11/02/2000EP1049250A2 Temperature compensation AGC circuit with temperature characteristic of AGC voltage
11/02/2000EP1049249A1 Variable gain amplifiers
11/02/2000EP1048176A2 Apparatus and method of linearizing a power amplifier in a mobile radio communication system
11/02/2000DE19956462A1 Automatic gain control circuit has AGC detection circuit that supplies control signal to amplifier to regulate gain so level of input reference signal in digital signal is constant
11/01/2000CN1272035A Demodulator circuit and demodulation method of radio receiving equipment
11/01/2000CN1058117C Method and apparatus for amplifying signal
11/01/2000CN1058116C Device for controlling output level of FM detecting circuit using phase locked loop
10/2000
10/31/2000US6141561 Reception circuit for cellular telephone
10/26/2000WO2000064049A1 Dually adjustable electromechanical means for handling and system of these, and dually adjustable digital potentiometer
10/26/2000WO2000025445A9 Method and apparatus for calibration of a wireless transmitter
10/25/2000EP1047188A2 Offset voltage cancellation system for radio frequency power controllers
10/25/2000EP1047187A2 Pre-amplifier circuit
10/25/2000EP1046226A1 Amplifier
10/25/2000EP0847621B1 Highly responsive automatic output power control based on a differential amplifier
10/25/2000EP0846368B1 An apparatus and method for providing a flexible ramp up and ramp down of the sections of a radio in a wireless local area network
10/25/2000CN1271209A Pre-amplifier cirucit
10/24/2000US6137647 Automatic gain control circuit for use in detecting servo pulses for controlling the position of a read head in a hard disk drive
10/24/2000US6137365 Variable-gain amplifier circuit and attenuator circuit
10/24/2000US6137358 Class S radio frequency power amplifier
10/24/2000US6137357 Method for adjusting power of transmitter, and control arrangement
10/24/2000US6137354 Bypassable amplifier
10/24/2000US6137322 Dynamic output control circuit
10/18/2000EP1044549A1 Telephone with means for enhancing the subjective signal impression in the presence of noise
10/18/2000EP1044499A1 Reception method and receiver
10/18/2000CN1270735A Method and apparatus for controlling a telephone ring signal
10/18/2000CN1270719A Optical amplifier with gain adjustment
10/17/2000US6133965 Digital AGC control for high definition television tuner
10/17/2000US6133792 Method and apparatus for preventing power amplifier saturation
10/12/2000WO2000060736A1 Transmitter and receiver
10/12/2000CA2333742A1 Transmitter and receiver
10/11/2000EP1043844A2 Method for power control in spread spectrum system
10/11/2000EP1043834A1 Temperature Independent power control loop
10/11/2000EP1043833A1 RF power control loop with variable loop filter
10/11/2000CN1269924A Power controller
10/10/2000US6131021 Method for extending the RSSI range and radio transceiver operating in accordance with this method
10/10/2000US6130910 Method and apparatus for high efficiency wideband power amplification
10/05/2000WO2000059110A2 Method and apparatus for automatically adjusting speaker and microphone gains within a mobile telephone
10/04/2000EP1041759A2 Method and device for digital frame synchronisation of a transmission signal
10/04/2000EP1041728A2 Spread-spectrum system and method
10/04/2000EP1041727A2 Spread-spectrum system and method
10/04/2000EP1041722A1 Power controller
10/04/2000EP1041691A2 An optical transmission circuit using a semiconductor laser
10/04/2000EP1040728A1 Peak to peak signal detector for audio system
10/04/2000EP1040586A1 Programmable linear receiver
10/04/2000EP1040572A2 Low voltage, beta immune variable gain amplifier with high supply voltage rejection
10/04/2000EP1040570A2 A current steering variable gain amplifier with linearizer
10/04/2000EP1040568A2 A variable gain amplifier using impedance network
10/04/2000CN1269066A Efficient parallel-stage power amplifier
10/04/2000CN1268816A Radio receiver, radio receiving method and recording medium
10/04/2000CN1268808A Control device
10/03/2000US6128477 System for improving the dynamic range of transmitter power measurement in a cellular telephone
10/03/2000US6128383 Input/output circuit for a communication device
10/03/2000US6127893 Method and apparatus for controlling an audio signal level
10/03/2000US6127890 Variable gain circuit with improved gain response
09/2000
09/27/2000EP0827642B1 A cartesian loop transmitter
09/27/2000CN1268011A Method for counting electric power control code value according temperature compensation in radio communication terminal
09/27/2000CN1267957A Power control circuit and transmitter
09/27/2000CN1267956A Automatic gain control method and circuit and receiving apparatus using the same circuit
09/26/2000US6125288 Telecommunication apparatus capable of controlling audio output level in response to a background noise
09/26/2000US6125265 Portable telephone device
09/26/2000US6124758 RF power amplifier control system
09/26/2000CA2117238C Digital supervisory audio tone detector
09/26/2000CA2074124C Transmitter with nonlinearity correction circuits
09/21/2000WO2000055968A1 Power amplifier unit
09/20/2000WO2001069827A1 Transmitting apparatus and gain compensating method
09/20/2000EP1037381A2 Automatic gain control circuit and receiver device having the automatic gain control circuit, and automatic gain control method
09/20/2000EP1036434A1 Automatic gain-controlled vhf/uhf antenna tuning apparatus
09/20/2000EP1036425A1 Vhf/uhf self-tuning planar antenna system
09/20/2000CN1267409A Arrangement and method relating to radio unit
09/20/2000CN1267407A Modular transceiver system and identification of modules therein
09/19/2000US6122701 Device volume control in multimode computer systems
09/19/2000US6122491 Communications system using power amplifier with dynamic biasing
09/19/2000US6122332 Apparatus for reducing impulse noise in high-frequency digital receivers
09/19/2000US6122331 Digital automatic gain control
09/14/2000WO2000054528A1 Radio receiver and received power amplifying method
09/14/2000DE19909773A1 Verstärkerschaltvorrichtung Amplifier switching device
09/14/2000DE19909772A1 Switching device for reference current controlled amplifier e.g. in communications transmission systems using frequency multiplexing (FMD)
09/13/2000EP1035646A1 Circuit for a controllable amplifier
09/13/2000EP1034613A2 Converter circuit and variable gain amplifier with temperature compensation
09/13/2000CN1266551A Radio receiver and gain controlled amplifier therefor
09/12/2000US6118989 High frequency variable gain amplifier device and wireless communications terminal
09/12/2000US6118342 System and method for providing precise RF amplifier gain control over temperature
09/08/2000WO2000052837A1 Transmission power control device and transmissiom power control method
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