| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
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| 01/16/2001 | US6175275 Preamplifier with an adjustable bandwidth |
| 01/10/2001 | EP1067726A2 Voltage control of optical receiver bandwidth |
| 01/04/2001 | WO2001001566A2 Method for processing an audio signal |
| 12/28/2000 | DE19928420A1 Audio signal processing involves adding band limited, corrected and again band limited audio signal to original audio signal, whereby correction factor is reduced if maximum exceeded |
| 12/20/2000 | EP1061647A2 Ladder filter, analog equalizer and signal readout system |
| 12/20/2000 | EP1061644A1 Amplifier for distribution in a network |
| 12/19/2000 | US6163789 Digital parametric equalizer with symmetrical cut and boost spectrums |
| 12/06/2000 | CN1275838A Gain control circuit, receiver and transmitter, radio communication device and system |
| 12/06/2000 | CN1059298C Audio amplifier |
| 11/29/2000 | EP1056197A2 Gain Control Circuit |
| 11/28/2000 | US6154547 Adaptive noise reduction filter with continuously variable sliding bandwidth |
| 11/16/2000 | WO2000030403A3 Dynamic bass control circuit with variable cut-off frequency |
| 10/31/2000 | US6141425 Sound quality adjustment circuit |
| 10/18/2000 | EP1044583A1 Means for bass enhancement in an audio system |
| 10/17/2000 | US6134330 Ultra bass |
| 09/27/2000 | EP1038350A1 Apparatus and methods for enhancing electronic audio signals |
| 09/19/2000 | US6122385 Sound reproduction apparatus with stable feedback |
| 09/05/2000 | US6114686 Current-to-voltage conversion IC and a photoelectric conversion IC |
| 08/24/2000 | DE10000292A1 Receiver automatic gain control for mobile phone |
| 08/22/2000 | US6108428 Tone control device and sound volume/tone control device for reducing noise at the time of tone modification |
| 08/22/2000 | US6107879 Automatic dynamic range control circuit |
| 08/16/2000 | CN1263384A Automatic gain control of receiver and its method |
| 07/27/2000 | WO2000044200A1 Intelligent speaker tuning using non-volatile memory |
| 07/19/2000 | CN1260634A Automatic gain controlling method and apparatus |
| 07/19/2000 | CN1054718C Diversity receiver |
| 07/12/2000 | EP1018803A2 Automatic gain control method and device |
| 07/11/2000 | US6088460 Equalizer and audio device using the same |
| 07/05/2000 | EP1017167A2 Acoustic characteristic correction device |
| 07/05/2000 | EP1017166A2 Acoustic characteristic correction device |
| 07/05/2000 | EP1016318A1 Hearing instrument |
| 07/04/2000 | US6084974 Digital signal processing device |
| 06/28/2000 | EP1014571A2 Audio apparatus of negative impedance driving with adaptive gain control |
| 06/21/2000 | EP1011192A2 A linear amplifier arrangement |
| 06/20/2000 | US6078670 Method and arrangement for reproducing audio signals |
| 06/20/2000 | CA2241000C Audio signal waveform emphasis processing device and method |
| 06/15/2000 | WO2000035247A1 Loudspeaker system with feedback control for improved bandwidth and distortion reduction |
| 06/13/2000 | US6075978 Automatic gain control system and method of automatic gain control |
| 05/31/2000 | EP1005252A2 Reproduction apparatus for audio signal carriers and method for influencing a sound characteristic of a signal to be reproduced from an audio signal carrier |
| 05/30/2000 | US6069533 Circuit and method for automatically adjusting common mode rejection ratio |
| 05/30/2000 | CA2231834C Frequency compensated pin diode attenuator |
| 05/25/2000 | WO2000030403A2 Dynamic bass control circuit with variable cut-off frequency |
| 05/25/2000 | DE19854125A1 Wiedergabegerät für Audiosignalträger und Verfahren zur Beeinflussung einer Klangcharakteristik eines wiederzugebenden Audiosignals von einem Audiosignalträger Reproducing apparatus for audio signal carrier and method of influencing a characteristic of a sound to be reproduced audio signal from an audio signal carrier |
| 05/24/2000 | EP1003285A2 Loudness device |
| 05/18/2000 | WO2000028784A1 Method for in-situ measuring and in-situ correcting or adjusting a signal process in a hearing aid with a reference signal processor |
| 05/17/2000 | EP1001652A2 Automatic loudspeaker equalizer |
| 05/17/2000 | EP1001529A1 Linear power amplifier arrangement and method for its operation |
| 05/10/2000 | EP0999650A2 Broadcast receiver for RDS and method of influencing the sound characteristics of the received audio signal in a broadcast receiver |
| 05/09/2000 | US6061458 Audio mixing console |
| 05/02/2000 | US6058148 Digital processing radio receiver with adaptive bandwidth control |
| 04/27/2000 | DE19848491A1 Radio receiver with audio data system has control unit to allocate sound characteristic according to transferred program type identification adjusted in receiving section |
| 04/05/2000 | EP0991184A2 Digital tone control with linear step coefficients |
| 04/05/2000 | CN1249891A Audio system comprising audio signal processing circuit |
| 04/05/2000 | CN1249890A Audio system comprising audio signal processing circuit |
| 03/29/2000 | EP0561881B1 Compensating filters |
| 03/16/2000 | WO2000014998A1 Means for bass enhancement in an audio system |
| 03/14/2000 | US6038428 Power control circuit for transmission apparatus |
| 03/14/2000 | US6038325 Speaker system for use in an automobile vehicle |
| 02/22/2000 | US6028944 Signal processing apparatus with selective power amplification |
| 02/15/2000 | US6026168 Methods and apparatus for automatically synchronizing and regulating volume in audio component systems |
| 02/02/2000 | EP0977358A2 An integrator circuit using an amplifier |
| 02/02/2000 | EP0724714B1 Vortex flowmeter electronics |
| 02/01/2000 | CA2177266C Voice enhancement system and method |
| 01/29/2000 | CA2278973A1 A fully integrated long time constant integrator circuit |
| 01/19/2000 | EP0972347A2 Serial digital data communications receiver with automatic cable equalizer, agc system, and dc restorer |
| 01/19/2000 | EP0972340A1 Automatic volume control in an audio-signal reproduction facility, and device required |
| 01/13/2000 | WO2000002418A1 Hearing instrument |
| 01/06/2000 | WO2000001198A1 System for reducing the effects of acoustically noisy environments on detected sound signals |
| 01/04/2000 | US6011770 Method and apparatus for high-order bandpass filter with linearly adjustable bandwidth |
| 12/29/1999 | EP0966790A1 Apparatus and methods for the harmonic enhancement of electronic audio signals |
| 12/23/1999 | WO1999026337A9 Methods and apparatus for automatically synchronizing and regulating volume in audio component systems |
| 12/21/1999 | US6005953 Circuit arrangement for improving the signal-to-noise ratio |
| 12/02/1999 | WO1999053615A3 A device and method for reduction of transients |
| 11/30/1999 | US5995817 Device for varying the cutoff frequency of a low-pass filter |
| 11/30/1999 | US5994958 Amplifier arrangement |
| 11/24/1999 | EP0958710A1 Audio system comprising audio signal processing circuit |
| 11/16/1999 | US5987145 Digital audio equalizer |
| 11/09/1999 | US5983191 Method and apparatus for automatically compensating tone color |
| 11/09/1999 | US5982907 Audio signal waveform emphasis processing device and method |
| 10/27/1999 | EP0951799A1 Audio system comprising audio signal processing circuit |
| 10/26/1999 | US5974152 Sound image localization control device |
| 10/21/1999 | WO1999053615A2 A device and method for reduction of transients |
| 10/20/1999 | EP0951201A2 Audio reproducing apparatus |
| 10/06/1999 | CN2342518Y Preamplifier for kara OK microphone |
| 10/05/1999 | US5963856 Wireless receiver including tunable RF bandpass filter |
| 09/22/1999 | EP0944166A1 Automatic dynamic range controlling circuit |
| 09/16/1999 | DE19742803A1 Modification of a known electronic bass booster with loudspeaker protection, esp. for car radios |
| 09/14/1999 | US5953431 Acoustic replay device |
| 09/14/1999 | US5953430 Filter circuit and audio signal processor provided therewith |
| 09/08/1999 | EP0940913A2 Radio receiver for a vehicle |
| 09/08/1999 | EP0746393A4 Dual output multi function interface device for audio systems |
| 09/08/1999 | CN1228205A Apparatus and methods for harmonic enhancement of electronic audio signals |
| 09/01/1999 | EP0939486A2 Filter circuit |
| 08/31/1999 | US5946402 Signal processing device for processing sound quality, and recording apparatus, reproducing apparatus and mixing apparatus provided with the signal processing device applied thereto |
| 08/25/1999 | CN1227024A Method and apparatus for applying user selected frequency response pattern to audio signals provided to cellular telephone speaker |
| 08/10/1999 | US5937071 Sound field expanding apparatus with improved tone control system |
| 07/29/1999 | WO1999026337A3 Methods and apparatus for automatically synchronizing and regulating volume in audio component systems |
| 07/28/1999 | EP0932253A2 Soft gain update method & apparatus |
| 07/27/1999 | US5930375 Audio mixing console |
| 07/15/1999 | WO1999035737A1 Pre-amplifier |
| 06/29/1999 | US5918203 Method and device for determining the tonality of an audio signal |