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)
01/1982
01/19/1982US4311963 Noise pulse suppressing system
01/19/1982US4311873 Bias control circuit and method for use in audio reproduction system or the like
01/19/1982US4311369 Sound motion picture camera
01/07/1982WO1982000073A1 Light receiving circuit
01/06/1982EP0043257A1 Operational amplifier with programmable gain
01/05/1982CA1115641A1 System for reducing noise transients
12/1981
12/30/1981EP0042460A1 Homomorphic automatic gain control
12/22/1981US4307348 Automatic gain control circuit
12/16/1981EP0041566A1 Bandpass amplifier circuits
12/15/1981US4306115 Automatic volume control system
12/15/1981US4306114 Automatic audio mixing selector device
12/15/1981US4306112 Stereophonic receiver noise eliminating device
12/08/1981US4305063 Automatic digital gain ranging system
12/08/1981US4305042 Circuit for compensating for discontinuity of a noise cancelled signal
12/08/1981CA1114033A1 Voltage offset network
11/1981
11/24/1981US4302817 Digital Pseudo continuous tone detector
11/17/1981US4301541 Noise eliminating circuit
11/17/1981US4301445 Communication system and method having wide dynamic range digital gain control
11/17/1981US4301378 Dual rate bi-directional switch
11/17/1981US4301331 Composite limiting sum and difference circuitry for extending the reception area of a frequency modulated stereo radio transmitter
11/17/1981CA1112741A1 Automatic control system with gain switching
11/11/1981EP0039428A1 Protection against crackle noises for digital audio programme transmission
11/10/1981US4300172 Playback system with amplitude correction for frequency modulated signals
11/10/1981US4300133 Smoke detector
11/10/1981US4300104 Automatic gain control circuit for a noise pulse canceller
11/10/1981US4300102 Variable gain control circuit
11/10/1981US4300101 Multiple parallel input noise reduction system
11/04/1981EP0039199A2 Automatic gain control arrangement useful in an FM radio receiver
11/04/1981EP0039080A1 Transmitter for pulse-shaped high-frequency signals
10/1981
10/28/1981EP0038331A1 Signal processing equipment for ultrasonic visualisation.
10/27/1981US4297730 Magnetic recording and reproducing device
10/27/1981US4297645 Automatic gain control circuit comprising a circuit for comparing a modulated signal with an envelope detected signal
10/27/1981US4297527 Input gain adjusting apparatus and method
10/27/1981CA1111499A1 Noise blanker with variable rate-shut-off and/or variable blanking threshold level
10/13/1981US4295088 Temperature-sensitive voltage divider
10/13/1981CA1110548A1 Circuit for suppressing noise caused by scratches on a gramophone record
10/06/1981US4293823 Balanced input phonograph preamplifier circuit
10/06/1981US4293822 Gated AGC amplifier with dc feedback
10/06/1981US4293736 Noise eliminator for radio receiver
09/1981
09/29/1981US4292598 Automatic gain control circuit
09/29/1981US4292596 Gain control circuit
09/29/1981US4292467 Control for audio receiver
09/29/1981CA1109934A1 System having a fixed excitation and providing a variable ratio output
09/22/1981US4290335 High frequency roll-off circuit
09/22/1981CA1109525A1 Automatic modulation control apparatus
09/15/1981US4290146 Measuring device for transmitting measuring signals via an optical link
09/15/1981US4290025 Amplifier arrangement with variable gain factor
09/15/1981US4289981 Pulsive component detecting apparatus
09/15/1981US4289928 Tone control arrangement for use in sound reproducing instruments
09/09/1981EP0035257A1 Device for switching off a receiver at a small signal-to-noise ratio for a digital modulation radio system
09/08/1981US4288753 Muting circuit with operational amplifier
09/01/1981US4287476 Control circuit
09/01/1981US4287391 Microphone assembly for speech recording using noise-adaptive output level control
09/01/1981CA1108251A1 Gain control circuit in combination with a differential amplifier
08/1981
08/25/1981US4286116 Device for the processing of voice signals
08/25/1981CA1107824A1 Transistor amplifier stage with selectively adjustabale gain control circuit
08/20/1981WO1981002353A1 Digital pseudo continuous tone detector
08/18/1981CA1107355A1 Amplifier arrangement for acoustic signals, provided with means for suppressing (undesired)spurious signals
08/11/1981US4283793 Muting signal generation circuit for an FM receiver
08/05/1981EP0033198A1 Bias circuit for a field effect transistor
08/04/1981CA1106491A1 Muting circuit
07/1981
07/29/1981EP0032533A1 Amplifier circuit
07/22/1981EP0032324A1 Method of controlling the gain of circuits amplifying the signals produced by a read head associated with a record carrier, and device for carrying it out
07/14/1981US4278945 Circuit for the generation of a control variable for the control of the transfer constant of electronically actuable amplifying and attenuating members
07/14/1981US4278901 Pulsive component detecting apparatus
07/07/1981US4277757 Two stage RF amplifier
07/07/1981US4277695 Amplifier having dead zone of controllable width and position
06/1981
06/30/1981US4276604 Automatic attenuation circuit
06/30/1981CA1104220A1 Gain and impedance switching circuit for an amplifier
06/30/1981CA1104212A1 Fm stereophonic receiver having muting and mode changing
06/25/1981WO1981001780A1 Bandpass amplifier circuits
06/24/1981EP0030874A1 Distortion reducing circuit for an FM receiver
06/23/1981US4275362 Gain controlled amplifier using a pin diode
06/23/1981US4275361 H.F. amplifier
06/23/1981US4275354 Pulse width modulating circuit
06/16/1981US4274117 Digital record level setting system
06/16/1981US4274107 Memory-type automatic adjustment system
06/16/1981US4274058 Amplifier with separate AC and DC feedback loops
06/11/1981WO1981001636A1 Audio signal processing system using a signal level gain control element
06/09/1981US4272648 Gain control apparatus for digital telephone line circuits
06/02/1981US4271535 Noise eliminating system
06/02/1981US4271503 Automatic control device for a receiver using a pilot
05/1981
05/26/1981US4270223 Signal normalizer
05/26/1981US4270222 Radio-frequency head having a self-adaptive dynamic range
05/26/1981US4270221 Phaselocked receiver with orderwire channel
05/26/1981US4270177 Digital amplitude control for digital audio signal
05/19/1981US4268793 Noise eliminating circuit
05/19/1981CA1101501A1 Signal level detecting circuit
05/12/1981US4267598 Noise-memory regulated squelch compensator
05/12/1981US4267518 Gain controllable amplifier stage
05/06/1981EP0028202A1 Amplitude control device for electromyographically recorded signals
04/1981
04/29/1981EP0027758A1 Automatic gain control device using optical means in a system for transmitting electric signals by an optical link
04/29/1981EP0027519A1 Circuit arrangement for the automatic volume control of a loudspeaker in dependence upon an interference noise level prevailing at the loudspeaker's location
04/28/1981CA1100201A1 Programmable attenuator apparatus employing active fet switching
04/22/1981EP0027365A1 Selective-call communications receiver
04/21/1981US4263624 Analog recording on magnetic media
04/21/1981US4263560 Log-exponential AGC circuit
04/15/1981EP0027066A1 Device for detecting speech signals and transmit-receive switching system comprising such a device
04/15/1981EP0026929A1 Device for the automatic adjustment of the level of sound sources prevailing in variable-noise surroundings
04/14/1981US4262366 Signal-transmitting system including an optical limb with automatic amplitude limitation
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