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)
12/1991
12/12/1991WO1991019350A1 Circuit arrangement for regulating signals
12/11/1991EP0460280A2 Transmitting power control circuit
12/03/1991CA1292788C Electronic volume device
11/1991
11/28/1991WO1991018427A1 Attenuator including a switchable gain stage
11/27/1991EP0250453B1 Cascaded internal impedance dependent amplifier with accurate variable gain control
11/26/1991CA1292517C Digital fm squelch detector
11/21/1991EP0457622A2 Variable gain amplifier
11/21/1991EP0457609A2 Detector for automatic gain control amplifier circuit
11/21/1991EP0457582A2 Level detecting circuit
11/21/1991EP0456921A1 Attenuator
11/20/1991CN1056389A Apparatus for conditioning control signal
11/19/1991US5067119 Recording medium playing apparatus with automatic tonal response setting function
11/14/1991DE4033407C1 Electronic control for audio appts. in motor vehicles - comprises push buttons for setting levels and generating confirmation audio signal
11/14/1991DE4015019A1 Audio circuit with electronically controlled transmission - has feedback amplifier followed by voltage divider with controlled tap-off switching
11/13/1991EP0456321A2 Circuit with controlled transfer characteristic
11/13/1991EP0456102A2 Apparatus for conditioning a signal parameter
11/13/1991EP0455974A2 Control circuit for a superheterodyne receiver
11/08/1991CA2039793A1 Apparatus for conditioning a signal parameter
11/06/1991EP0455388A2 Receiver
11/05/1991US5063597 Muting circuit in a digital audio system
11/05/1991US5063580 Apparatus for conditioning a control signal
10/1991
10/30/1991EP0453680A2 Three-terminal operational amplifier and applications thereof
10/30/1991EP0453541A1 Rf wideband high power amplifier
10/29/1991US5061900 Self-zeroing amplifier
10/28/1991WO1991017606A1 Digital automatic gain control
10/24/1991DE4012451A1 Loudness controller for TV or radio - has pick=up feeding comparator with adjustable reference, operating gain controller
10/23/1991EP0452734A2 Hands free telephone device
10/23/1991EP0452650A2 Electronic gain cell
10/23/1991EP0452557A1 Signal level measuring circuit including correction means
10/23/1991EP0389569B1 Circuit arrangement with adjustable active and/or passive components
10/22/1991US5060272 Audio mixing console
10/22/1991US5060178 System for analog-digital-analog conversion
10/22/1991US5059918 Procedure and apparatus for amplification of a burst signal
10/22/1991CA1291240C Audio alarm outputting device for outboard engine
10/16/1991EP0451748A2 Optical signal receiver
10/16/1991EP0451277A1 Automatic gain control circuit
10/15/1991US5058168 Overflow speech detecting apparatus for speech recognition
10/15/1991US5058083 Flexducer preamplifier power controller
10/15/1991US5057787 Variable gain differential amplifier
10/15/1991CA1290844C Method and apparatus for improving voice intelligibility in high noise environments
10/09/1991EP0449823A1 Improved variolosser
10/08/1991US5055843 Sigma delta modulator with distributed prefiltering and feedback
10/02/1991EP0448729A1 Tune detecting circuit
10/02/1991CN1014200B Digital automatic gain control
10/01/1991US5054116 Feed-forward automatic level control circuit for a high-frequency source
10/01/1991US5054078 Method and apparatus to suspend speech
10/01/1991US5054076 Key-actuated volume control
09/1991
09/25/1991EP0448071A2 Controlling system for radio receiver
09/25/1991EP0447593A1 AGC circuit using MOS-technology
09/25/1991EP0380475A4 Fm communications system with improved response to rayleigh-faded received signals
09/24/1991US5051707 Gain control circuit for amplifier having stepwise variable gain
09/24/1991US5051705 Gain-tilt amplifier
09/24/1991US5050474 Analog signal synthesizer in PCM
09/19/1991WO1991014309A1 Method and apparatus to suspend speech
09/18/1991EP0446470A2 Noise reducing circuit
09/17/1991US5050192 Automatic gain control
09/17/1991CA1289207C Microwave absorber attenuator for linear sspa power control
09/17/1991CA1289204C Agc circuit
09/11/1991EP0446073A1 A method for improving the precision of power regulation in a radio telephone
09/03/1991USH965 Differential amplifier with digitally controlled gain
09/03/1991US5046126 Fast settling tone/data processing circuit for a radio receiver
09/03/1991US5046107 Input level adjusting circuit
09/03/1991US5046101 Audio dosage control system
09/03/1991US5045809 Automatic gain control (AGC) circuit for a trunk interface in a private branch exchange (PBX)
09/03/1991US5045804 Amplifying circuit
08/1991
08/28/1991EP0443884A2 Signal processing apparatus
08/28/1991EP0443251A2 A low cost digital amplitude regulator
08/28/1991EP0443250A2 A general purpose low cost digital amplitude regulator
08/27/1991US5043999 Circuit arrangement for digitally setting the gain of a digitally adjustable receive amplifier
08/27/1991US5043676 Automatic level control circuit
08/27/1991US5043672 Power detector utilizing bias voltage divider for precision control of an amplifier
08/27/1991CA1288150C Optical ranging by phase shift measurement
08/20/1991US5042070 Automatically configured audio system
08/20/1991US5041795 Three-terminal operational amplifier and applications thereof
08/20/1991US5041793 Controlled slew rate amplifier
08/18/1991WO1991012661A1 Power amplifier
08/14/1991EP0441716A1 Voltage controlled resistor
08/14/1991EP0441580A2 Circuit for reducing distortion produced by an r.f. power amplifier
08/14/1991EP0440680A1 Digital fm squelch detector
08/13/1991US5040220 Control circuit for controlling reproduced tone characteristics
08/13/1991US5039960 Wideband feedforward gallium arsenide AGC circuit
08/13/1991US5039952 Electronic gain cell
08/13/1991US5039887 Circuit arrangement for controlling the level of electrical signals
08/08/1991WO1991011863A1 Sigma delta modulator
08/08/1991WO1991011855A1 High inpedance optoelectronic receiver
08/08/1991WO1991011854A1 Amplitude locked loop circuits
08/08/1991DE4101556A1 Hochohmiger optoelektronischer empfaenger High impedance optoelectronic empfaenger
08/06/1991US5038112 Levelling control circuit
08/06/1991US5038055 Peak level detecting device and method
08/06/1991CA1287384C Controlled-output amplifier and power detector therefor
07/1991
07/31/1991EP0439435A2 Control loop for reducing the time of response of a tuner-AGC of a superheterodyne receiver and relative leading edge differentiating circuit used in the control loop
07/30/1991US5036543 Noise suppression apparatus for FM receiver
07/30/1991US5036540 Reducing background noise
07/30/1991US5036527 Iterative automatic gain control for an analog front end of a modem
07/24/1991EP0341292A4 Adaptive, programmable signal processing hearing aid
07/23/1991US5034984 Speed-controlled amplifying
07/23/1991US5034699 Trimming of operational amplifier gain
07/23/1991CA1286735C Cascaded internal impedance dependent amplifier with accurate variable gain control
07/10/1991EP0436100A2 Method for controlling audio-visual equipment and apparatus therefor
07/09/1991US5030924 Temperature compensated exponential gain control circuit
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