| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
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| 05/14/2002 | US6388599 Reference voltage generator circuit using pairs of fine and rough resistor banks |
| 05/14/2002 | US6388530 Microwave amplifier implemented by heterojunction field effect transistors |
| 05/10/2002 | WO2001080423A3 Method and apparatus for dynamic sound optimization |
| 05/08/2002 | EP1204216A1 Method and apparatus for distortion compensation of radio device |
| 05/08/2002 | EP0966790A4 Apparatus and methods for the harmonic enhancement of electronic audio signals |
| 04/30/2002 | US6381469 Frequency equalizer, and associated method, for a radio telephone |
| 04/25/2002 | US20020048378 Deep bass sound booster device |
| 04/25/2002 | US20020047794 Reference voltage generator circuit |
| 04/18/2002 | DE10049383A1 Manually operated regulating unit has regulating stage in form of manually variable inductance and/or capacitance with control stage matched to correspond to hearing |
| 04/09/2002 | US6369644 Filter circuit |
| 04/03/2002 | EP1192837A2 Method for processing an audio signal |
| 03/21/2002 | WO2001063757A3 Portable equalizer with frequencies adjustable according to the user's hearing capacity |
| 03/21/2002 | US20020034221 Serial digital data communications receiver with improved automatic cable equalizer, AGC system, and DC restorer |
| 03/14/2002 | WO2002021687A2 System and method for varying levels of low audio frequences inversely with audio signal level |
| 03/13/2002 | CN1080966C Telephone set |
| 03/07/2002 | WO2001035527A3 Gigabit ethernet transceiver with analog front end |
| 03/07/2002 | US20020027962 Device and method for porcessing frequency signals |
| 03/07/2002 | DE10035673C1 Dynamic sound optimization in the interior of a motor vehicle or similar noisy environment, a monitoring signal is split into desired-signal and noise-signal components which are used for signal adjustment |
| 02/14/2002 | US20020018573 Microphone-tailored equalizing system |
| 02/07/2002 | US20020015499 Infrabass |
| 02/05/2002 | CA2098190C Compensating filters |
| 01/31/2002 | US20020012437 Audio reproducing apparatus |
| 01/30/2002 | EP1176594A1 Audio reproducing apparatus |
| 01/24/2002 | WO2002007308A2 Infrabass |
| 01/22/2002 | US6341166 Automatic correction of power spectral balance in audio source material |
| 01/16/2002 | CN1331516A Device and method for processing frequency signals |
| 01/10/2002 | DE10030583A1 Arrangement for processing high frequency signals has power limiter with analogue signal processing and digital signal processing with selective suppression of defined frequency ranges |
| 01/02/2002 | EP1168606A2 Device and Method for Processing Radiofrequency Signals |
| 11/22/2001 | US20010043704 Microphone-tailored equalizing system |
| 11/15/2001 | WO2000044200A9 Intelligent speaker tuning using non-volatile memory |
| 11/13/2001 | US6317117 User interface for the control of an audio spectrum filter processor |
| 11/08/2001 | WO2001084880A2 Infra bass |
| 11/01/2001 | US20010036285 Infra bass |
| 11/01/2001 | US20010036278 Ultra bass II |
| 10/30/2001 | US6310516 Attenuation compensation in amplification for a distribution network |
| 10/25/2001 | WO2001080423A2 Method and apparatus for dynamic sound optimization |
| 10/18/2001 | WO2001078447A1 Ultra bass ii |
| 10/18/2001 | US20010030579 Audio signal amplifier circuit and portable telephone set and portable electronic device using the same audio signal amplifier circuit |
| 10/18/2001 | DE10018666A1 Dynamic sound optimization in the interior of a motor vehicle or similar noisy environment, a monitoring signal is split into desired-signal and noise-signal components which are used for signal adjustment |
| 10/17/2001 | EP0972340B1 Automatic volume control in an audio-signal reproduction facility, and device required |
| 10/16/2001 | US6304615 Serial digital data communications receiver with improved automatic cable equalizer, AGC system, and DC restorer |
| 10/04/2001 | US20010026917 DNA detection device |
| 10/04/2001 | DE10114026A1 Audio system for electronic musical instrument, modifies frequency characteristics of music sound automatically depending on the location of instrument |
| 09/27/2001 | US20010024505 Audio system in electronic musical instrument |
| 09/20/2001 | US20010022812 Adaptive audio equalizer apparatus and method of determining filter coefficient |
| 09/11/2001 | US6288611 Apparatus and method to trim a programmable low-frequency monolithic high-pass filter |
| 09/11/2001 | US6288606 Linear power amplifier arrangement and method for its operation |
| 09/05/2001 | EP1129600A1 Method for in-situ measuring and in-situ correcting or adjusting a signal process in a hearing aid with a reference signal processor |
| 09/04/2001 | CA2020258C Frequency equalizer |
| 08/30/2001 | WO2001063757A2 Portable equalizer with frequencies adjustable according to the user's hearing capacity |
| 08/30/2001 | US20010017921 Sound field correcting method in audio system |
| 08/28/2001 | US6282296 Audio reproducing apparatus |
| 08/23/2001 | US20010016047 Automatic sound field correcting system |
| 08/23/2001 | US20010016046 Automatic sound field correcting system and a sound field correcting method |
| 08/23/2001 | US20010016045 Method of correcting sound field in an audio system |
| 08/22/2001 | EP1126746A2 Automatic sound field correcting system and a sound field correcting method |
| 08/22/2001 | EP1126745A2 Sound field correcting method in audio system |
| 08/22/2001 | EP1126744A2 Automatic sound field correcting system |
| 08/22/2001 | EP1126743A2 Method of correcting sound field in an audio system |
| 08/22/2001 | EP1126458A1 Method for adjustment of volume control of a digital sound recording |
| 08/16/2001 | CA2337176A1 Process for adjusting the sound level of a digital sound recording |
| 08/14/2001 | US6275685 Linear amplifier arrangement |
| 08/14/2001 | US6275593 Apparatus and methods for the harmonic enhancement of electronic audio signals |
| 08/14/2001 | CA2338458A1 Method and vlsi circuits allowing to change dynamically the logical behaviour |
| 07/26/2001 | WO2001001566A3 Method for processing an audio signal |
| 07/18/2001 | EP1117179A2 Digital Graphic/Parametric Equalizer |
| 07/18/2001 | CN1304132A Device for producing harmonic wave in audio signal |
| 07/12/2001 | US20010007590 Loudness volume control system |
| 06/20/2001 | EP1109421A2 Digital self-adapting graphic equalizer and method |
| 06/13/2001 | EP1107640A2 Device for creating harmonics in an audio signal |
| 06/13/2001 | DE19955696A1 Vorrichtung zur Erzeugung von Oberwellen in einem Audiosignal An apparatus for generating harmonics in an audio signal |
| 06/12/2001 | USRE37223 Dynamic equalizing |
| 06/07/2001 | US20010002820 Reference voltage generator circuit |
| 06/06/2001 | CN1066872C Low-input-signal bandwidth compressor and amplifier control circuit |
| 05/31/2001 | WO2001039546A1 Hearing aid device incorporating signal processing techniques |
| 05/31/2001 | WO2001039371A1 Audio boost circuit |
| 05/29/2001 | US6240189 Generating a common bass signal |
| 05/23/2001 | CN1066307C Output power controlling circuit and antenna shared device of mobile telecommunication apparatus |
| 05/17/2001 | WO2001035527A2 Gigabit ethernet transceiver with analog front end |
| 05/15/2001 | US6232837 Optimal control method for adaptive feedforward linear amplifier |
| 04/04/2001 | EP1038350A4 Apparatus and methods for enhancing electronic audio signals |
| 03/28/2001 | EP1087523A2 Digital graphic equalizer control system and method |
| 03/28/2001 | CN1063893C Balancer and audio equipment fitted with balancer |
| 03/20/2001 | US6204791 Reference voltage generator using two fine resistor ladders |
| 03/14/2001 | EP0885484A4 Fat sound creation means |
| 03/14/2001 | EP0842562A4 Automatically switched equalization circuit |
| 03/14/2001 | CN1287765A Means for bass enhancement in an audio system |
| 02/27/2001 | US6195439 Voice signal processor |
| 02/27/2001 | US6195438 Method and apparatus for leveling and equalizing the audio output of an audio or audio-visual system |
| 02/14/2001 | CN1284214A Appts and methods for enhancing electronic audio signals |
| 02/08/2001 | WO2001010020A1 Filter banked gain control of audio in a noisy environment |
| 02/06/2001 | CA2254007C Methods and apparatus for automatically synchronizing and regulating volume in audio component systems |
| 02/01/2001 | WO2001008320A1 Method and apparatus for distortion compensation of radio device |
| 01/24/2001 | EP1071231A2 Audio data processing apparatus |
| 01/23/2001 | US6178314 Radio receiver with adaptive bandwidth controls at intermediate frequency and audio frequency sections |
| 01/23/2001 | US6178211 Digital processing radio receiver with adaptive bandwidth control |
| 01/17/2001 | EP1069682A2 Switchable buffer circuit |
| 01/17/2001 | EP1068774A1 Intelligent speaker tuning using non-volatile memory |
| 01/17/2001 | EP1068768A2 Dynamic bass control circuit with variable cut-off frequency |
| 01/17/2001 | CN1280451A Switchover type buffer loop for frequency characteristic |