| Patents for H03G 7 - Volume compression or expansion in amplifiers (2,243) |
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| 07/27/1983 | EP0084323A1 Circuit arrangement for generating a D.C. control voltage dependent upon an A.C. voltage |
| 07/26/1983 | CA1150638A1 Gain control circuit for noise reduction system |
| 07/12/1983 | US4393367 Digital compandor having nonlinear companding characteristics |
| 07/07/1983 | WO1983002371A1 Non-linear amplifier systems |
| 06/29/1983 | EP0082381A1 Electronic amplifier |
| 06/29/1983 | EP0082380A1 Electronic amplifier with variable voltage-controlled gain, in particular an expander |
| 06/14/1983 | US4388654 Video disc player with selectively enabled audio signal expander circuitry |
| 06/07/1983 | CA1147819A1 Gain control systems |
| 05/31/1983 | CA1147267A1 Gain control circuit for noise reduction system |
| 05/24/1983 | US4385364 Electronic gain control circuit |
| 04/26/1983 | US4381488 Dynamic volume expander varying as a function of ambient noise level |
| 04/13/1983 | EP0076415A1 Expander for noise reduction of compressed audio signals |
| 03/22/1983 | US4377792 Compander system |
| 03/22/1983 | US4377788 Signal expander |
| 03/15/1983 | US4376916 Signal compression and expansion system |
| 03/03/1983 | WO1983000787A1 System for maximum efficiency transfer of modulated signals utilizing line systems |
| 01/25/1983 | US4370681 Gain control circuit for noise reduction system |
| 01/25/1983 | CA1140211A1 Circuit system for the generation of a direct control voltage depending upon an alternating voltage |
| 01/18/1983 | US4369509 Gain control circuit for noise reduction system |
| 01/11/1983 | US4368435 System for maximum efficient transfer of modulated audio frequency energy |
| 01/11/1983 | CA1139433A1 Video signal recording and/or reproducing apparatus |
| 01/05/1983 | EP0068185A1 Circuit arrangement for generating a D.C. control voltage dependent upon an A.C. voltage |
| 12/21/1982 | CA1137879A1 Compander for changing over to different compander characteristics |
| 12/07/1982 | US4363006 Noise reduction system having series connected variable frequency filters |
| 10/27/1982 | EP0063485A2 Digital data companding |
| 10/19/1982 | US4355304 Digital compandor |
| 10/05/1982 | CA1133142A1 Digital compandor having nonlinear companding characteristic |
| 09/22/1982 | EP0060662A1 Logarithmic amplifiers |
| 09/14/1982 | US4349787 Compressor |
| 08/18/1982 | EP0057753A1 Method of converting linear PCM words into non-linear PCM words and reversely non-linear PCM words into linear PCM words according to a 13 segments characteristic obeying the A-law |
| 08/03/1982 | CA1128872A1 Volume control apparatus |
| 07/27/1982 | US4342059 Electronic gain and noise control for recording of analog information |
| 07/13/1982 | CA1127754A1 Signal processing apparatus |
| 07/07/1982 | EP0055402A1 Circuit with variable transmission characteristics |
| 06/29/1982 | US4337440 Electronic cascade circuit comprising a circuit having controllable transfer characteristics and a two-port |
| 06/09/1982 | EP0053303A2 Volume compression and/or expansion circuit |
| 05/25/1982 | US4331931 Gain control systems |
| 05/25/1982 | US4331927 Noninverting amplifier circuit with low input impedance |
| 05/12/1982 | EP0051362A2 Electronic gain control circuit |
| 05/04/1982 | CA1123087A1 Compression amplifier with a derivative circuit to reduce the overall amplitude variation of ultrasonic echo signals |
| 04/20/1982 | US4326223 Video signal recording and/or reproducing apparatus with gain control |
| 04/15/1982 | WO1982001290A1 System for maximum efficient transfer of modulated audio frequency energy |
| 04/06/1982 | CA1121275A1 Digital signal/noise ratio amplifier apparatus for a communication system |
| 03/30/1982 | US4322636 Circuit system for the generation of a direct control voltage dependent upon an alternating voltage |
| 03/23/1982 | US4321482 Circuit system for the generation of a direct control voltage which is dependent on an alternating voltage |
| 03/09/1982 | US4319205 Control voltage generator for a system for dynamic compression or expansion |
| 03/02/1982 | US4318053 Amplifier system with automatic distortion control |
| 03/02/1982 | US4318009 Circuit system for the generation of a direct control voltage depending upon an alternating voltage |
| 02/23/1982 | US4317142 Electronic gain and noise control for recording of analog information |
| 02/02/1982 | CA1117431A1 Syllabic compander with logarithmic chain |
| 01/26/1982 | US4313194 Transmission system of frequency division multiplex signals on digital links |
| 01/05/1982 | US4309676 Instantaneous compressor and instantaneous expandor |
| 12/30/1981 | EP0042460A1 Homomorphic automatic gain control |
| 12/15/1981 | US4306202 Compander |
| 12/09/1981 | EP0041310A1 An electronic circuit for signal compression and expansion |
| 10/13/1981 | US4295223 Digital signal/noise ratio amplifier apparatus for a communication system |
| 10/06/1981 | US4293817 Signal amplitude range compression employing pulse modulation |
| 09/15/1981 | US4289140 Signal processing system |
| 09/01/1981 | US4287491 Circuit for selectively obtaining automatic dynamic compression or expansion |
| 07/28/1981 | US4281295 Noise reducing apparatus |
| 07/14/1981 | US4278945 Circuit for the generation of a control variable for the control of the transfer constant of electronically actuable amplifying and attenuating members |
| 06/03/1981 | EP0029490A1 Method of converting linear-coded digital signals into non-linear coded digital signals according to a multiple segment characteristic responding to the A law or the mu law |
| 06/02/1981 | US4271439 Electronic gain and noise control for recording of analog information |
| 05/26/1981 | US4270103 Amplifier having a variable propagation constant |
| 02/24/1981 | US4253072 Compandor with sampling and equalization |
| 02/10/1981 | US4250471 Circuit detector and compression-expansion networks utilizing same |
| 02/10/1981 | US4250470 Syllabic compander with logarithmic chain |
| 01/06/1981 | US4243944 Circuit for automatic dynamic compression or expansion |
| 12/16/1980 | US4240037 Homomorphic automatic gain control |
| 12/09/1980 | US4238736 Peak limiting by half waves |
| 12/02/1980 | CA1090707A1 Adaptive filter for companding system |
| 11/18/1980 | US4234851 Logarithmic lock-in amplifier |
| 11/18/1980 | CA1089934A1 Synchronized compressor and expander voice processing system for radio telephone |
| 11/12/1980 | EP0018782A1 Communication system with digital signal/noise ratio amplifier apparatus |
| 11/11/1980 | US4233566 Distortion free power limiting and clipping prevention circuit |
| 09/09/1980 | US4221934 Compandor for group of FDM signals |
| 09/02/1980 | US4220929 Signal expander |
| 09/02/1980 | US4220875 Electronic circuit having its impedance controlled by an external signal |
| 08/19/1980 | US4218662 Circuit arrangement for optional dynamic compression or expansion |
| 08/05/1980 | US4216427 Adaptive audio compressor |
| 06/10/1980 | CA1079362A1 Adaptive audio compressor |
| 05/27/1980 | US4205269 Remote control variable attenuation device for an antenna amplifier |
| 05/27/1980 | US4205241 Quantized modulation systems |
| 02/26/1980 | US4190806 Circuit arrangement for the selective compression or expansion of the dynamic range of a signal |
| 02/12/1980 | US4188587 Linear gain control apparatus utilizing feed forward level control |
| 02/05/1980 | US4187478 Noise reduction system having specific encoder circuitry |
| 02/05/1980 | US4187477 Noise reduction system |
| 02/05/1980 | CA1071308A1 Pulse code modulation with dynamic range limiting |
| 01/08/1980 | US4182993 Signal amplitude compression system |
| 01/01/1980 | US4181896 Device for optional dynamic compression or expansion |
| 10/09/1979 | US4170720 AGC circuit particularly for a hearing aid |
| 10/09/1979 | CA1064172A1 Apparatus for suppressing background noise in a digital telephone system |
| 09/25/1979 | US4169219 Compander noise reduction method and apparatus |
| 09/11/1979 | US4167681 Microwave power limiter comprising a dual-gate FET |
| 08/28/1979 | CA1061255A1 Real time amplitude control of electrical waves |
| 08/23/1979 | WO1979000560A1 Circuit for automatic dynamic compression or expansion |
| 07/24/1979 | US4162457 Expansion circuit for improved stereo and apparent monaural image |
| 07/03/1979 | CA1057666A2 Signal compression/expansion apparatus |
| 06/19/1979 | US4158859 Automatic control of iris and clamping voltage in video signal generator |
| 06/12/1979 | CA1056311A1 Signal compression/expansion apparatus |