Patents
Patents for H03G 3 - Gain control in amplifiers or frequency changers (20,162)
08/1995
08/22/1995US5444418 Method and apparatus for feedforward power amplifying
08/22/1995US5444312 Soft switching circuit for audio muting or filter activation
08/22/1995CA2097057C Dynamically biased amplifier
08/17/1995WO1995019073A3 Receiver having an adjustable bandwidth filter
08/16/1995EP0667675A1 Bias control device for an amplifier
08/15/1995US5442321 Automatic transimpedance control amplifier
08/15/1995US5442311 System and method for controlling a gain circuit
08/12/1995CA2141981A1 Amplifier bias control device
08/09/1995EP0666645A1 Circuit with gain control
08/09/1995EP0665996A1 Radio transmitter with power amplifier linearizer
08/08/1995US5440643 Audio peripheral mixer circuit and method for noise reduction
08/08/1995US5440261 Electronic device with low current consumption
08/02/1995EP0665657A2 Power amplifier for radio transmitter and dual mode remote radio
08/02/1995EP0665641A2 Power amplifier and radio transmitter
08/02/1995CN1029444C Analog-to-digital converter circuit having automatic range control
08/01/1995US5438689 Radio receiver for a vehicle having improved audibility for speech
08/01/1995US5438683 Automatic level control circuit for dual mode analog/digital cellular telephone
07/1995
07/28/1995CA2139707A1 Mobile radio communication apparatus adaptable to power supply voltage change
07/26/1995EP0555239B1 Controlling clipping in a microwave power amplifier
07/26/1995EP0426792B1 Digital signal processor based agc
07/26/1995CN1105789A Automatic gain control apparatus
07/19/1995EP0663748A1 Ambient noise suppression circuit for a telephone transmit channel
07/19/1995EP0663120A1 Squelch detector
07/18/1995US5434926 Automatic sound volume control method
07/18/1995US5434922 Method and apparatus for dynamic sound optimization
07/18/1995US5434539 Unity-gain linear-fader control for VCA
07/18/1995US5434537 Circuit for measuring the output power from an amplifier
07/18/1995US5434536 Semiconductor emulation of vacuum tubes
07/18/1995US5434498 Fuse programmable voltage converter with a secondary tuning path
07/13/1995WO1995019073A2 Receiver having an adjustable bandwidth filter
07/12/1995EP0662268A1 Method and device for automatic gain control in an amplifier of an electroacoustic system, particularly for motor vehicules
07/11/1995US5432478 Linear interpolation circuit
07/11/1995US5432473 Dual mode amplifier with bias control
07/11/1995US5432389 Gain stage circuit with automatic level control
07/11/1995CA2042950C Automatic power control circuit for use with a radio telecommunication apparatus
07/06/1995WO1995018508A1 Circuit for the acquisition of a carrier signal by applying a substitute pilot to a synchronous demodulator
07/05/1995EP0661834A2 Method and circuit for signal combining in a space diversity receiving system
07/05/1995EP0661804A2 Volume controller
07/05/1995EP0661616A2 Bandgap voltage reference generator
07/04/1995US5430765 Digital data receiver having DC offset cancelling preamplifier and dual-mode transimpedance amplifier
07/04/1995US5430411 High-frequency amplifier arrangement, transceiver station comprising such an amplifier arrangement and mobile radio system comprising such stations
07/04/1995US5430410 Amplifier bias control system
06/1995
06/28/1995EP0660539A2 RF Receiver using IF amplifier operative during low level reception
06/28/1995EP0660536A2 Microcomputer-based carrier detection system for a cordless telephone
06/28/1995EP0660511A2 Automatic gain control in radio receivers
06/28/1995EP0660505A2 Error-free pulse noise canceler used in FM tuner
06/28/1995EP0659288A1 Low cost controller
06/28/1995EP0451277B1 Automatic gain control circuit
06/27/1995US5428830 Concealed antenna system with remote variable gain RF amplifier
06/22/1995WO1995017044A1 Average rf exposure control
06/22/1995WO1995017042A1 An amplifier for use in a radiotelephone
06/20/1995US5426641 Adaptive class AB amplifier for TDMA wireless communications systems
06/14/1995EP0658018A1 Method and system for clock synchronization in an optical communications network
06/14/1995EP0657997A1 Method for the automatic gain control in a digital receiver and receiver using this method
06/13/1995US5424685 High-level modulator with bipolar modulation reference
06/13/1995US5424682 Variable gain amplifier circuit
06/13/1995US5424679 For providing a control signal for a voltage controlled amplifier
06/13/1995US5424678 Muting of computer sound system during power cycling
06/08/1995WO1995015643A1 Voice enhancement system and method
06/07/1995EP0656165A1 Using d-c feedback with on-chip filtering to balance i-f drive to second detector in monolithic ic
06/07/1995EP0656164A1 Parallel untuned video if amplifiers supplied signals from tv 1st detector via respective input filters
06/06/1995US5423081 Cellular power amplifier power level control circuitry
06/06/1995US5422602 Frequency discriminate leveler
06/06/1995US5422601 Hybrid analog digital automatic gain control gain recovery system
06/06/1995US5422598 High-frequency power amplifier device with drain-control linearizer circuitry
05/1995
05/31/1995EP0655848A2 Automatic gain control circuit for a digital baseband line equalizer
05/31/1995EP0655832A2 Circuit for the limitation of distortions of audio signals
05/30/1995US5420711 Fiber optic link amplitude stabilization circuit
05/30/1995US5420536 Linearized power amplifier
05/30/1995US5420535 Audio amplifier turn-off control circuit
05/24/1995EP0654900A2 Radio communication device with power control of transmission
05/24/1995EP0654899A1 Method and device of gain control of a high frequency amplifier
05/24/1995EP0654898A2 Transmission circuit
05/24/1995EP0654897A1 Automatic gain control device in an RF receiver
05/23/1995US5418859 Correcting apparatus of sound signal distortion by way of audio frequency band segmentation
05/23/1995US5418494 Variable gain amplifier for low supply voltage systems
05/23/1995CA2136266A1 Automatic variable radio volume control system
05/23/1995CA2136251A1 Adjustable clip detection system
05/23/1995CA2032352C Demodulation control arrangement in satellite communications system using "scpc-dama"
05/18/1995WO1995013662A1 Power detector with matching impedance for amplifier
05/16/1995US5416441 Automatic control circuit for power amplifier
05/10/1995EP0651925A1 Frequency hopping time-diversity communications systems and transceivers for local area networks
05/10/1995EP0651906A1 Semiconductor-emulation of vacuum tubes
05/09/1995US5414776 Adaptive proportional gain audio mixing system
05/09/1995US5414389 For electrically controlling an amount of attenuation of input signals
05/09/1995US5414386 Muting apparatus in car audio system
05/04/1995WO1995012245A1 Method and apparatus for controlling a peak envelope power of a power amplifier
05/03/1995EP0651521A2 Discriminating signal noise from received signals
05/02/1995US5412690 Method and apparatus for receiving electromagnetic radiation within a frequency band
05/02/1995US5412346 Variable gain voltage signal amplifier
05/02/1995US5412341 Power control apparatus and method for a radio frequency amplifier
05/02/1995US5412263 Multiple control voltage generation for MOSFET resistors
04/1995
04/25/1995US5410741 Automatic gain control of transponded supervisory audio tone
04/25/1995US5410729 Signal transmission device having an automatic transmission level control circuit used in a multi-carrier transmission terminal equipment and multi-carrier transmission terminal equipment employing the transmission device
04/25/1995US5410368 Carrier acquisition by applying substitute pilot to a synchronous demodulator during a start up interval
04/25/1995US5410275 Amplifier circuit suitable for use in a radiotelephone
04/25/1995US5410272 RF amplifier signal-level control, and radio transmitter equipped therewith
04/20/1995DE4334890A1 Alarm detection circuit for a device operated in a motor vehicle
04/19/1995EP0648851A1 Sulfur-containing powder-metallurgy tool steel article and its method of manufacture
04/19/1995EP0648384A1 Method and apparatus for controlling amplifier power.