| Patents for H03G 7 - Volume compression or expansion in amplifiers (2,243) |
|---|
| 08/02/1994 | US5335068 Gamma compensating circuit method and apparatus of a color TV camera |
| 08/02/1994 | US5334979 Power controller |
| 07/27/1994 | EP0607789A1 Circuit for generating an output signal exponentially depending on the input signal |
| 07/14/1994 | DE4300591A1 Exponential function generator for automatic gain control |
| 07/12/1994 | CA2009449C Time dependant, variable amplitude threshold output circuit for frequency variant and frequency invariant signal discrimination |
| 06/28/1994 | US5325240 Data compression and expansion apparatus for audio recorders |
| 06/15/1994 | EP0601888A2 Variable gain RF amplifier with linear gain control |
| 06/15/1994 | EP0601740A2 RF amplifier with linear gain control |
| 06/07/1994 | US5319704 Control circuit for voltage controlled attenuator for speakerphones |
| 06/07/1994 | US5319264 Logarithmic amplifying circuit |
| 06/01/1994 | EP0599653A2 Digital sound level control in a telephone system |
| 06/01/1994 | EP0599399A1 An apparatus with RSSI and an electronic circuit including a logarithmic detector |
| 05/31/1994 | US5317640 Switched amplifier |
| 05/24/1994 | US5315660 Wideband expander for stereo and SAP signals |
| 05/24/1994 | US5315261 Compressing and expanding operational circuit with no use of clock signal |
| 05/11/1994 | WO1994010771A1 Simultaneous transmission of audio and data signals |
| 05/11/1994 | WO1994010751A1 Clipper circuitry |
| 05/11/1994 | EP0596663A2 A high efficiency encoding device and a noise spectrum modifying device and method |
| 05/04/1994 | EP0595406A1 Radio device with signal compression |
| 05/04/1994 | CN1086359A Cipper circuitry |
| 04/26/1994 | US5307026 Variable gain RF amplifier with linear gain control |
| 04/26/1994 | US5306968 Rectifier circuit not using clock signal |
| 04/19/1994 | US5304948 RF amplifier with linear gain control |
| 04/19/1994 | US5304873 Log compressing circuit providing capability of keeping clamp level independent of variety of amplification factor |
| 04/13/1994 | EP0591441A1 An improved multiband programmable compression system |
| 04/13/1994 | CN1085375A Switched signal processing circuit |
| 04/12/1994 | US5302911 Preamplifier |
| 04/12/1994 | US5302868 Method and apparatus for providing a representation of an input voltage at a disabled voltage multiplier's output |
| 03/31/1994 | WO1994007341A1 Electroacoustic speech intelligibility enhancement method and apparatus |
| 03/29/1994 | US5298811 Synchronous logarithmic amplifier |
| 03/22/1994 | US5296761 Temperature-compensated logarithmic detector having a wide dynamic range |
| 03/08/1994 | US5293139 CMOS-compander |
| 03/08/1994 | US5293101 Driving circuit apparatus for CRT |
| 03/02/1994 | EP0584718A1 Switched signal processing circuit |
| 02/17/1994 | WO1993021689A3 Demodulating logarithmic amplifier |
| 02/16/1994 | EP0367803B1 Noise reduction |
| 02/15/1994 | CA2034452C Wideband expander for stereo and sap signals |
| 02/09/1994 | EP0581835A1 Circuit for controllable amplifier |
| 02/08/1994 | US5285167 System for producing a digitized analog signal |
| 02/03/1994 | WO1994002990A1 Method and apparatus for signal compression |
| 02/03/1994 | WO1994002934A1 Semiconductor emulation of vacuum tubes |
| 01/12/1994 | EP0577896A1 Preamplifier |
| 01/11/1994 | US5278912 Audio frequency signal compressor |
| 01/11/1994 | US5278518 Amplifying circuit with exponential gain control |
| 01/04/1994 | US5276764 Method and device for compressing and expanding an analog signal |
| 01/04/1994 | US5276403 Nonlinear preemphasis-deemphasis system |
| 12/29/1993 | CN1023353C Recording and reproducing method and recording and reproducing apparatus |
| 12/22/1993 | EP0575110A2 Compressing and expanding digital signals |
| 12/15/1993 | CN1023181C Amplifier arrangement for producing controllable non-linear transfer characteristic useful for improving contrast of image |
| 12/07/1993 | US5268685 Apparatus with transient-dependent bit allocation for compressing a digital signal |
| 12/07/1993 | CA2000434C Integrated compression amplifier having programmable threshold voltage |
| 11/16/1993 | US5263092 Digital volume control circuit |
| 11/03/1993 | EP0568290A1 Audio coding device and method therefor |
| 11/03/1993 | EP0348396B1 Radio receiver speech amplifier circuit |
| 10/28/1993 | WO1993021689A2 Demodulating logarithmic amplifier |
| 10/19/1993 | US5255325 Signal processing circuit in an audio device |
| 10/19/1993 | US5254851 Wide-dynamic range light receiver |
| 09/30/1993 | WO1993019525A1 Visual dynamics management for audio instrument |
| 09/15/1993 | EP0465576B1 Logarithmic amplifier |
| 09/14/1993 | US5245668 Device for aurally compensated loudness control |
| 09/14/1993 | US5245299 Compandor with DC-coupled compressor |
| 09/14/1993 | US5245229 Digitally controlled integrated circuit anti-clipping mixer |
| 09/02/1993 | WO1993017395A1 Digitally controlled integrated circuit anti-clipping mixer |
| 08/31/1993 | US5241689 Digital signal processor audio compression in an RF base station system |
| 08/31/1993 | US5241282 Wide dynamic range, low power, analog-to-digital receiver |
| 07/01/1993 | WO1993000779A1 An improved multiband programmable compression system |
| 07/01/1993 | CA2111829A1 Multiband programmable compression system |
| 06/30/1993 | EP0548479A1 Amplification circuit with exponential gain control |
| 06/22/1993 | US5221907 For scaling an input signal |
| 06/02/1993 | EP0543927A1 Variable-gain amplifier controlled by an analog signal and having a large dynamic range |
| 05/19/1993 | EP0542711A1 Method for shifting the frequency of signals |
| 05/19/1993 | EP0542710A1 Method for processing signals |
| 05/19/1993 | EP0541754A1 Video noise reduction method using non-linear pre/de-emphasis |
| 05/14/1993 | CA2082190A1 Method for processing signals |
| 05/14/1993 | CA2082189A1 Method for shifting the frequency of signals |
| 05/04/1993 | US5208866 On-board vehicle automatic sound volume adjusting apparatus |
| 05/04/1993 | US5208551 Noise reduction circuit with a main signal path and an auxiliary signal path having a high-pass filter characteristic |
| 04/28/1993 | EP0538806A1 Circuit for signal limiting and signal strength detection |
| 04/28/1993 | EP0538289A1 Process for transmitting a time-variable control parameter |
| 04/21/1993 | EP0537959A2 CMOS-Compander |
| 04/20/1993 | US5204909 Audio processing system using delayed audio |
| 03/31/1993 | CN1070526A Circuit arrangement for controlling volume range of voice terminal |
| 03/30/1993 | CA1315344C Log-polar signal processing |
| 03/18/1993 | DE4223906A1 Signal processor for audio reproduction, e.g. for CD player - has detector to identify pre-emphasis based on 4 bit code to control de-emphasiser coupled to amplifier gain control |
| 03/18/1993 | DE4221428A1 Signal compressor for audio reproduction system - detects input signal level to access tables containing output values for compressing different signal ranges |
| 03/17/1993 | EP0532203A1 Power controller |
| 03/17/1993 | EP0531769A1 Circuit arrangement for dynamic control of a speech communication terminal |
| 03/16/1993 | US5194998 Signal processing apparatus including deemphasis processing |
| 03/10/1993 | EP0530912A1 Receiver with analog compression and digital expansion |
| 03/10/1993 | EP0530342A1 Dynamic range compression |
| 02/25/1993 | DE4128045A1 Noise suppression for stereo radio - compresses lower and upper side bands of differential signal in stereo transmitter |
| 02/11/1993 | DE4126386A1 Phase and amplitude modulation communications receiver with dynamic compression - generates voltage which is logarithmically proportional to amplitude of IF signal, and uses to modulate IF signal after passing through limiting amplifier |
| 02/03/1993 | EP0526110A2 Driving circuit apparatus for CRT |
| 01/27/1993 | EP0524294A1 Amplification circuit with exponential gain control. |
| 01/21/1993 | WO1993001655A1 Dynamic limiting circuit |
| 01/21/1993 | CA2112909A1 Dynamic limiting circuit |
| 01/14/1993 | DE4122004A1 Time-variable adjusting magnitude transmission e.g. for car radio - transmitting magnitude as amplitude change of stereo pilot tone and correlating on reception |
| 01/05/1993 | US5177381 Distributed logarithmic amplifier and method |
| 12/30/1992 | CN1067535A Regulated amplifier circuit |
| 12/10/1992 | WO1992022136A1 Video noise reduction method using non-linear pre/de-emphasis |