| Patents for H03G 7 - Volume compression or expansion in amplifiers (2,243) |
|---|
| 12/10/1992 | CA2088597A1 Video noise reduction method using non-linear pre/de-emphasis |
| 12/09/1992 | EP0517305A1 Logarithmic amplifier and detector |
| 12/08/1992 | US5170437 Audio signal energy level detection method and apparatus |
| 12/08/1992 | CA1311291C Talker speech level control circuit for telephone transmitter by piezoelectric conversion |
| 11/25/1992 | EP0514929A2 Logarithmic intermediate-frequency amplifier |
| 11/25/1992 | EP0514813A2 Mobile telephone device wherein an adder supplies a sum of audio and out-of audio band signals to a compressor circuit |
| 11/25/1992 | EP0514542A1 Feedback clamping circuit |
| 11/25/1992 | CN1066553A Plural time constant signal control |
| 11/17/1992 | US5165017 In a hearing device |
| 11/12/1992 | WO1992020148A1 Circuit for controllable amplifier |
| 11/11/1992 | EP0512376A2 Plural time constant signal control |
| 11/11/1992 | EP0512365A1 Apparatus for aurally compensated volume regulation |
| 11/03/1992 | CA1309665C Amplitude compressing/expanding circuit |
| 10/28/1992 | EP0510704A1 Circuit for a controllable amplifier |
| 10/28/1992 | EP0510227A1 Circuit for signal limitation and for detection of electromagnetic field strength |
| 10/27/1992 | US5159636 Audio signal expander apparatus |
| 10/27/1992 | US5159280 True logarithmic amplifier having a variable gain amplifier |
| 10/14/1992 | EP0284627B1 Digital audio companding and error conditioning |
| 10/06/1992 | CA1308444C Fmx stereophonic receiver |
| 09/30/1992 | EP0505751A2 Logarithmic amplification circuit |
| 09/22/1992 | US5150324 Analog arithmetic circuit that can perform multiplication division expansion and compression by using delta sigma modulator |
| 09/21/1992 | WO1992016996A1 Dynamic range compression |
| 09/21/1992 | CA2082171A1 Dynamic range compression |
| 09/08/1992 | US5146507 Audio reproduction characteristics control device |
| 09/02/1992 | CN1018131B Fmx stereophonic receiver |
| 09/01/1992 | US5144675 Variable recovery time circuit for use with wide dynamic range automatic gain control for hearing aid |
| 08/20/1992 | WO1992014302A1 Amplification circuit with exponential gain control |
| 08/12/1992 | EP0498197A2 Circuit for DC control of a compressor |
| 07/21/1992 | US5133014 Semiconductor emulation of tube amplifiers |
| 07/21/1992 | US5133013 Noise reduction by using spectral decomposition and non-linear transformation |
| 07/14/1992 | US5130665 Audio volume level control |
| 06/30/1992 | US5126846 Non-linear amplifier and non-linear emphasis/deemphasis circuit using the same |
| 06/25/1992 | WO1992010877A1 Feedback clamping circuit |
| 06/23/1992 | US5124668 System for creating distortion in electric musical instruments |
| 06/17/1992 | DE4039670A1 Compression amplifier with offset compensation - has feedback network delivering regulating current on input voltage amplitude to current-voltage multiplier |
| 06/17/1992 | DE4039668A1 Audio compression amplifier avoiding cut=off - achieves by input independent reference current inputs to multiplier |
| 06/09/1992 | US5121076 Plural time constant signal control |
| 06/03/1992 | EP0312569B1 Method and apparatus for improving voice intelligibility in high noise environments |
| 05/26/1992 | CA1301862C Logarithmic amplification circuit for obtaining output voltage corresponding to difference between logarithmically amplified values of two input currents |
| 05/19/1992 | US5115207 Automatic signal parameter control |
| 05/19/1992 | US5115152 Amplifier having polygonal-line characteristics employing two comparators |
| 05/06/1992 | EP0484139A1 Logarithmic amplifying circuit |
| 05/06/1992 | EP0483702A2 Switched amplifier |
| 04/29/1992 | EP0482927A2 Digital radio receiver |
| 04/28/1992 | CA1299751C Digital audio companding and error conditioning |
| 04/22/1992 | EP0481529A2 Hearing aid circuit |
| 04/22/1992 | EP0481528A2 Hearing aid circuit |
| 04/08/1992 | EP0479213A2 Nonlinear processing method and apparatus |
| 04/01/1992 | EP0478389A1 Amplifier having polygonal-line characteristics |
| 03/31/1992 | US5101310 Matched record/playback AGC amplifier system |
| 03/24/1992 | US5099154 Amplifier arrangement for producing a controllable non-linear transfer characteristic useful for improving the contrast of an image |
| 03/24/1992 | CA1297951C Circuit arrangement for linearly amplifying and demodulating an am-modulated audio signal, and integrated semiconductor element for said circuit arrangement |
| 03/10/1992 | CA1297185C Hearing aid circuit |
| 03/05/1992 | WO1992003874A1 Variable-gain amplifier controlled by an analog signal and having a large dynamic range |
| 02/26/1992 | EP0472510A2 Logarithmic amplifier/detector delay compensation |
| 02/25/1992 | US5091957 Wideband expander for stereo and SAP signals |
| 02/18/1992 | US5089820 Recording and reproducing methods and recording and reproducing apparatus |
| 01/16/1992 | DE4021226A1 Voltage - controlled filter circuit - uses filter network with two filters receiving common control voltage and difference amplifier |
| 01/15/1992 | EP0466442A2 Non-linear preemphasis-deemphasis circuits |
| 01/09/1992 | DE4020932A1 Verfahren zum uebertragen einer sich zeitlich aendernden stellgroesse A method for wear by a temporally unchanging manipulated variable |
| 01/08/1992 | CN1057742A Method and device for processing analog signal |
| 01/07/1992 | US5079517 Circuit for DC control of a compressor |
| 01/02/1992 | EP0463656A1 A method and device for processing an analog signal |
| 12/31/1991 | WO1992000637A1 Process for transmitting a time-variable control parameter |
| 12/31/1991 | US5077541 Variable-gain amplifier controlled by an analog signal and having a large dynamic range |
| 12/31/1991 | CA2084791A1 Process for transmitting a time-variable control parameter |
| 12/25/1991 | CN1015223B Circuit arrangements for modifying dynamic range using action substitution and superposition techniques |
| 12/03/1991 | US5070527 Time dependant, variable amplitude threshold output circuit for frequency variant and frequency invarient signal discrimination |
| 12/03/1991 | US5070303 Logarithmic amplifier/detector delay compensation |
| 11/26/1991 | CA1292589C Signal compression circuit, particularly for a telephone set |
| 10/15/1991 | US5057717 Logarithmic amplifier circuit |
| 10/15/1991 | CA1290844C Method and apparatus for improving voice intelligibility in high noise environments |
| 10/08/1991 | CA1290255C Variable preemphasis/deemphasis network |
| 09/17/1991 | US5049829 Logarithmic amplifier with sequentially limiting amplifier stages |
| 09/10/1991 | US5048091 Talker speech level control circuit for telephone transmitter by piezoelectric conversion |
| 09/10/1991 | US5048059 Log-polar signal processing |
| 09/03/1991 | US5045732 Polygon circuit |
| 08/07/1991 | EP0307465A4 Semiconductor emulation of tube amplifiers |
| 08/06/1991 | US5038310 Digital processing |
| 08/06/1991 | US5038112 Levelling control circuit |
| 07/24/1991 | EP0341292A4 Adaptive, programmable signal processing hearing aid |
| 06/19/1991 | CN1012925B Circuit arrangement for linearly amplifying and demodulating am-modulated signal, and integrated semiconductor for said circuit arrangement |
| 06/11/1991 | US5023890 Digital peak noise reduction circuit |
| 06/11/1991 | US5023609 Digital deemphasis circuit |
| 06/11/1991 | US5023490 Analog signal compression circuit |
| 05/15/1991 | EP0348396A4 Radio receiver speech amplifier circuit |
| 05/08/1991 | EP0425875A2 Full wave rectifier/averaging circuit |
| 04/30/1991 | US5012139 Full wave rectifier/averaging circuit |
| 04/25/1991 | DE4000679C1 Regulating dynamic compressors and expanders - supplying max. and min. value signals from two branches to variable amplifier serving as adjuster |
| 04/24/1991 | EP0138914B1 Fm stereophonic radio broadcasting system having s channel companding |
| 04/16/1991 | US5008634 System for controlling the dynamic range of electric musical instruments |
| 04/10/1991 | EP0421559A2 Device for modifying the dynamic range of an input signal |
| 04/02/1991 | US5004906 Logarithmic amplifier, and image read-out apparatus using the same |
| 03/06/1991 | CN1049765A Amplifier arrangement for producing controllable non-linear transfer characteristic useful for improving contrast of image |
| 02/27/1991 | EP0414159A2 Amplifier arrangement for producing a controllable non-linear transfer characteristic useful for improving the contrast of an image |
| 02/19/1991 | US4995084 Semiconductor emulation of tube amplifiers |
| 02/07/1991 | DE3925305A1 Radio receiver for frequency or phase modulated signals - has analogue tuner with first dynamic compression characteristic and adjacent limiting characteristic |
| 02/05/1991 | US4990803 Logarithmic amplifier |
| 01/30/1991 | EP0410629A2 Automatic signal parameter control |
| 01/22/1991 | US4987383 Integrated compression amplifier having programmable threshold voltage |