| Patents for H03G 7 - Volume compression or expansion in amplifiers (2,243) |
|---|
| 08/16/2000 | CN1055583C Power amplifier with clipping level control |
| 08/15/2000 | US6104243 Integrated temperature-compensated amplifier circuit |
| 08/01/2000 | US6097936 Reception device for microwave signals |
| 07/19/2000 | EP1020027A1 Cmos differential voltage controlled logarithmic attenuator and method |
| 07/19/2000 | EP0830731A4 Signal conditioning circuit for compressing audio signals |
| 07/18/2000 | US6091275 Linear quad variable gain amplifier and method for implementing same |
| 07/04/2000 | US6084974 Digital signal processing device |
| 07/04/2000 | US6084472 Multi-tanh triplet with optimal biasing |
| 07/04/2000 | US6084471 Soft-limiting control circuit for variable gain amplifiers |
| 06/22/2000 | WO2000036876A1 Method for producing a constant sound pressure level in hearing aids and corresponding hearing aid |
| 06/06/2000 | US6072365 Audio level compression circuit |
| 05/24/2000 | CN1254454A Hearing aid having input AGC and output AGC |
| 05/23/2000 | US6066976 Apparatus and method for improved dynamic range |
| 05/09/2000 | US6061455 Audio system |
| 05/02/2000 | US6057737 Non-linear asymmetrical audio amplifiers |
| 04/26/2000 | EP0995262A1 Hearing aid having input agc and output agc |
| 04/20/2000 | WO2000022726A1 Non-linear asymmetrical audio amplifiers |
| 04/13/2000 | WO2000002309A3 A current steering variable gain amplifier with linearizer |
| 04/11/2000 | US6049618 Hearing aid having input AGC and output AGC |
| 04/11/2000 | US6049616 Dynamic range restorer and method |
| 04/06/2000 | WO2000019686A1 Telephone with means for enhancing the subjective signal impression in the presence of noise |
| 03/22/2000 | CN1050718C Solid state tube compression circuit |
| 03/14/2000 | US6037993 Digital BTSC compander system |
| 03/14/2000 | US6037838 Amplifier with programmable gain and input linearity usable in high-frequency lines |
| 03/08/2000 | EP0797824B1 Speech processing |
| 03/07/2000 | CA2044817C A method and device for processing an analog signal |
| 02/23/2000 | EP0879483A4 Temperature compensated logarithmic detector |
| 02/22/2000 | US6028944 Signal processing apparatus with selective power amplification |
| 02/15/2000 | CA2202959C Bit-serial digital compressor |
| 02/15/2000 | CA2003755C Audio signal expander apparatus |
| 02/08/2000 | US6023191 Method and apparatus for detecting an input signal |
| 02/08/2000 | CA2222339C Self-calibration system for logarithmic amplifiers |
| 02/02/2000 | EP0976303A1 Method and apparatus for noise reduction, particularly in hearing aids |
| 02/02/2000 | CN1049081C Clipper circuit |
| 02/01/2000 | CA2190787C A gain compression amplifier providing a linear compression function |
| 01/13/2000 | WO2000002309A2 A current steering variable gain amplifier with linearizer |
| 01/05/2000 | CN1048125C Multi-stage solid state amplifier that emulates tube distorbion |
| 01/05/2000 | CN1048123C Circuit of voltage limiter |
| 12/29/1999 | WO1999053612A8 User adjustable volume control that accommodates hearing |
| 12/29/1999 | EP0670089B1 Transcoding and transdecoding unit, and method for adjusting the output thereof |
| 12/28/1999 | US6009385 Speech processing |
| 12/16/1999 | DE19826389A1 Signalkomprimierer für Audiogerät Signal compressor for audio equipment |
| 12/15/1999 | EP0964512A2 Signal compression for audio device |
| 12/15/1999 | EP0922328A4 Multi-band audio compressor with look-ahead clipper |
| 12/09/1999 | WO1999063657A1 Linear quad variable gain amplifier and method for implementing same |
| 12/07/1999 | US5999053 Current steering variable gain amplifier with linearizer |
| 12/01/1999 | EP0961403A2 Integrated amplifying circuit comprising temperature compensation |
| 11/30/1999 | US5994961 Temperature compensated decibel linear variable gain amplifier |
| 11/17/1999 | EP0956642A1 Low power, high linearity log-linear control method and apparatus |
| 11/10/1999 | EP0541754B1 Video noise reduction method using non-linear pre/de-emphasis |
| 11/03/1999 | EP0954132A2 Receiver for Digital Audio Broadcasting comprising a dynamic range control system |
| 11/03/1999 | EP0636288B1 Demodulating logarithmic amplifier |
| 11/02/1999 | US5977812 Circuit and method for providing a generally log logarithmic transfer function |
| 11/02/1999 | CA2192498C Microphone expansion for background noise reduction |
| 10/26/1999 | US5973560 Automatic gain control circuit using multiplier and negative feedback system |
| 10/21/1999 | WO1999053612A1 User adjustable volume control that accommodates hearing |
| 10/21/1999 | WO1999053425A1 Apparatus and method for improved dynamic range and response time in a logarithmic amplifier |
| 10/21/1999 | CA2328353A1 User adjustable volume control that accommodates hearing |
| 10/06/1999 | EP0948132A1 Amplifier with programmable gain and input linearity usable in high-frequency lines |
| 09/22/1999 | EP0944166A1 Automatic dynamic range controlling circuit |
| 09/14/1999 | US5952880 Variable-gain amplifier with pseudo-logarithmic gain control for generating two control currents |
| 09/14/1999 | US5952867 Exponentiator circuit and method for generating decibel steps of programmable current gain |
| 09/09/1999 | DE19824199C1 Integrated logarithmic amplifier circuit with temperature compensation, e.g. for audio apparatus |
| 08/03/1999 | CA2151003C Power amplifier with clipping level control |
| 07/27/1999 | US5930695 Radio receiver with amplitude limiter prior to mixer and band limiting filter |
| 07/21/1999 | EP0839407B1 A high frequency, differential limiting distributed amplifier |
| 07/14/1999 | EP0776548A4 Linear-in-decibel variable gain amplifier |
| 07/13/1999 | US5923768 Digital audio processing |
| 07/13/1999 | US5923767 Digital audio processing |
| 07/13/1999 | US5923203 CMOS soft clipper |
| 07/06/1999 | CA2162310C Power controller for rf transmitters |
| 06/30/1999 | EP0926820A2 Soft-limiting control circuit for variable gain amplifiers |
| 06/30/1999 | CN1043944C Switched signal processing circuit |
| 06/16/1999 | EP0922328A1 Multi-band audio compressor with look-ahead clipper |
| 06/09/1999 | EP0921635A1 Power amplifier device |
| 06/01/1999 | US5909145 Variable control of electronic power supplies |
| 05/25/1999 | US5907823 Method and circuit arrangement for adjusting the level or dynamic range of an audio signal |
| 05/04/1999 | US5901234 Encoding method for encoding an acoustic signal |
| 04/15/1999 | WO1999018664A1 Cmos differential voltage controlled logarithmic attenuator and method |
| 04/13/1999 | US5894522 Distortion reduction system |
| 04/06/1999 | US5893028 Intermediate frequency gain stage with rectifier |
| 04/06/1999 | US5892834 Audio level dynamic range compression |
| 03/24/1999 | EP0903849A2 Audio level compression circuit |
| 03/23/1999 | US5886579 Variable gain CMOS amplifier |
| 03/11/1999 | DE19818020A1 Signal compression circuit |
| 03/10/1999 | EP0873589A4 Methods and apparatus for signal amplitude control systems |
| 03/09/1999 | US5880618 CMOS differential voltage controlled logarithmic attenuator and method |
| 03/02/1999 | US5877645 Offset compensation circuit for integrated logarithmic amplifiers |
| 02/23/1999 | US5874857 Amplifier stage with dB-linear output voltage |
| 02/02/1999 | US5867602 Reversible wavelet transform and embedded codestream manipulation |
| 01/28/1999 | WO1999004487A1 Signal-processing device |
| 01/26/1999 | US5864816 Method of mixing two or more compressed digitized audio signals |
| 01/12/1999 | CA2152497C Method and apparatus for detecting an input signal level |
| 01/07/1999 | WO1999000896A1 Hearing aid having input agc and output agc |
| 01/07/1999 | WO1999000895A1 Power amplifier device |
| 01/07/1999 | EP0889583A1 Reception device for microwave signals |
| 01/07/1999 | CA2294713A1 Hearing aid having input agc and output agc |
| 01/05/1999 | US5856892 Recording apparatus with a control for selecting a gain adjustment amount |
| 12/23/1998 | WO1998058448A1 Method and apparatus for low complexity noise reduction |
| 12/23/1998 | EP0885484A1 Fat sound creation means |