| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
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| 07/13/1993 | US5228091 Loudness control circuit for selectively emphasizing both high frequency and low frequency components |
| 07/13/1993 | US5227737 Method and apparatus for adjusting the pole positions of a differentiating amplifier |
| 06/24/1993 | DE4141843A1 Signal reproduction control for music and speech signals - identifying music or speech signal characteristic by signal analysis to adjust volume and-or tone setting |
| 06/22/1993 | US5222255 Intermodulation controller for radio receiver |
| 06/15/1993 | US5220220 Noise suppression system |
| 06/10/1993 | WO1993011647A1 Device for correcting frequency characteristic of sound field |
| 06/08/1993 | US5218710 Audio signal processing system having independent and distinct data buses for concurrently transferring audio signal data to provide acoustic control |
| 06/08/1993 | US5218643 Audio system for vehicle |
| 06/01/1993 | US5216384 Programmable amplifier device |
| 05/27/1993 | WO1993010646A1 Method and device for dynamic equalization |
| 05/27/1993 | CA2123396A1 Process and device for dynamic equalization |
| 05/26/1993 | EP0543396A1 Frequency modulation receiving apparatus having two intermediate-frequency band pass filters |
| 05/12/1993 | EP0541243A1 HF amplifier bandwidth control |
| 05/11/1993 | US5210806 Digital audio signal processing apparatus |
| 04/27/1993 | US5206913 Method and apparatus for logic controlled microphone equalization |
| 04/27/1993 | US5206912 Power amplifier adapter |
| 04/27/1993 | US5206603 Circuit arrangement with electronically controllable transfer characteristic |
| 04/21/1993 | EP0537792A1 Power amplifier, in particular, audio amplifier |
| 04/07/1993 | EP0507919A4 Controlled slew rate amplifier |
| 04/06/1993 | US5201009 Signal processor |
| 03/16/1993 | US5195141 Digital audio equalizer |
| 03/16/1993 | US5194827 Voltage controlled high frequency equalization |
| 03/09/1993 | CA1314312C Superdistorted amplifier circuitry with normal gain |
| 03/04/1993 | WO1993004529A1 A digital filtering method and apparatus |
| 03/03/1993 | EP0529158A1 Controlling sound dosage |
| 03/03/1993 | EP0262160B1 Stereo enhancement system |
| 03/02/1993 | US5191300 Local area network amplifier for twisted pair lines |
| 02/24/1993 | EP0528475A1 Method and apparatus for adjusting tone in a sound system |
| 02/04/1993 | WO1993002503A1 Adaptive graphic equalizer and radio using same |
| 02/03/1993 | EP0525242A1 Filter with controllable edge steepness |
| 01/28/1993 | DE4224338A1 Compensating sound signals according to auditorium conditions - varying high frequency range according to results of tests on room before playback |
| 01/26/1993 | US5182520 Non-linear de-emphasis circuit |
| 01/19/1993 | US5180990 Equalizer circuit, high fidelity regenerative amplifier including equalizer circuit and acoustic characteristic correction circuit in high fidelity regenerative amplifier |
| 01/19/1993 | CA1312922C Radio receiver receiving voice and data signals |
| 01/12/1993 | US5179730 Selectivity system for a direct conversion receiver |
| 01/12/1993 | US5179727 Automatic adjusting circuit for an analog filter |
| 01/07/1993 | EP0521653A2 Gain control amplifier |
| 01/05/1993 | US5177453 Gain control amplifier |
| 12/29/1992 | US5175770 Level control circuit for low and medium sound |
| 12/15/1992 | US5172417 Apparatus for controlling acoustical transfer characteristics |
| 12/15/1992 | US5172358 Loudness control circuit for an audio device |
| 12/08/1992 | US5170498 Band switching filter and satellite broadcast receiving system using the same |
| 11/25/1992 | EP0514818A1 Programmable amplifier |
| 11/25/1992 | CA2069123A1 Programmable amplifying device |
| 11/19/1992 | EP0513477A2 Preset type radio receiver |
| 11/12/1992 | DE4115017A1 Controllable voltage to current converter e.g. for controllable filter - has input stage formed by differential amplifier with fixed steepness or presettable control |
| 11/05/1992 | DE4208739A1 Tonaufzeichnungsgeraet Sound recorder |
| 10/21/1992 | EP0509048A1 Correction circuit and method for a two-way loudspeaker system |
| 10/14/1992 | EP0507919A1 Controlled slew rate amplifier |
| 09/23/1992 | EP0504988A2 Circuit arrangement to control the frequency response of a digital audio signal |
| 09/16/1992 | EP0503891A2 Signal processing apparatus |
| 09/16/1992 | EP0503154A2 RDS receiver |
| 09/08/1992 | US5146507 Audio reproduction characteristics control device |
| 09/08/1992 | CA1307328C Alternating current amplifier with digitally controlled frequency response |
| 09/01/1992 | US5144673 Reflection sound compression apparatus |
| 08/06/1992 | WO1992013388A1 Solid state audio amplifier emulating a tube audio amplifier |
| 07/22/1992 | EP0495672A2 White noise suppression circuit |
| 07/21/1992 | US5132632 Frequency multiplier |
| 07/21/1992 | CA1305432C Automatic loudness control circuit |
| 07/15/1992 | CN1062817A Controlled slew rate amplifier |
| 07/14/1992 | US5131044 Amplifier circuitry with mode compensation and selectable gain and frequency response in pre and post distortion circuits |
| 07/07/1992 | US5129006 Electronic audio signal amplifier and loudspeaker system |
| 06/25/1992 | WO1992010876A1 Compensating filters |
| 06/25/1992 | DE4101840A1 CD recording or playback system - dividing music signals between 2 different amplification channels, with subsequent recombining |
| 06/23/1992 | US5124657 Composite signal processor and single-ended noise reduction system |
| 06/16/1992 | US5123050 Sound field control system |
| 06/03/1992 | EP0488811A2 Magnetic recording and reproducing apparatus |
| 06/02/1992 | US5119420 Device for correcting a sound field in a narrow space |
| 05/19/1992 | US5115213 Frequency equalizer |
| 05/12/1992 | US5113151 Equalizing and amplifying circuit in an optical signal receiving apparatus |
| 05/12/1992 | US5113144 Feed-back type emphasis circuit |
| 05/01/1992 | WO1992008283A1 Controlled slew rate amplifier |
| 04/28/1992 | US5109419 Electroacoustic system |
| 04/22/1992 | EP0481529A2 Hearing aid circuit |
| 04/22/1992 | EP0481528A2 Hearing aid circuit |
| 04/08/1992 | EP0479395A2 Stereo enhancement system |
| 04/01/1992 | EP0478096A2 Stereo enhancement system |
| 03/31/1992 | CA1298361C Circuit for automatically controlling the gain-bandwidth product of operational amplifiers |
| 03/31/1992 | CA1298352C Noise reduction apparatus |
| 03/25/1992 | EP0476790A2 Stereo enhancement system |
| 03/10/1992 | US5095534 Radio receiver having improved signal-to-noise ratio for receiving voice and data signals |
| 03/10/1992 | CA1297185C Hearing aid circuit |
| 02/19/1992 | EP0471241A1 Processing device with automatic sound equaliser |
| 01/15/1992 | EP0466442A2 Non-linear preemphasis-deemphasis circuits |
| 01/15/1992 | EP0466435A2 Surround audio apparatus |
| 01/07/1992 | CA1293931C Automotive sound system |
| 01/02/1992 | EP0463885A2 Non-linear de-emphasis circuits |
| 12/31/1991 | US5077800 Electronic device for processing a sound signal |
| 11/19/1991 | US5067119 Recording medium playing apparatus with automatic tonal response setting function |
| 11/14/1991 | DE4015019A1 Audio circuit with electronically controlled transmission - has feedback amplifier followed by voltage divider with controlled tap-off switching |
| 11/13/1991 | EP0456321A2 Circuit with controlled transfer characteristic |
| 11/13/1991 | CN1014759B Alternating current amplifier with digitally controlled frequency response |
| 10/30/1991 | EP0453684A2 Playback equalizer for a tape recorder |
| 10/16/1991 | EP0451620A2 Arrangement for the reproduction of audio signals |
| 10/08/1991 | CA1290255C Variable preemphasis/deemphasis network |
| 10/01/1991 | US5053721 High fidelity regenerative amplifier with phase correction circuit |
| 10/01/1991 | US5053650 Monolithic semiconductor integrated circuit device having current adjusting circuit |
| 09/24/1991 | US5051942 Method and apparatus for calculating filter factors |
| 09/18/1991 | EP0446470A2 Noise reducing circuit |
| 09/17/1991 | US5050237 Radio receiver having automatic bandwidth control during tuning |