| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
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| 08/31/1982 | US4347404 Control device for an automotive vehicle FM radio |
| 08/03/1982 | CA1129009A1 Stereo composite processor for stereo radio receiver |
| 07/27/1982 | CA1128616A1 Filter circuit |
| 07/20/1982 | US4340780 Self-correcting audio equalizer |
| 07/13/1982 | US4339829 Automatic tuning system for a narrow bandwidth communication |
| 07/13/1982 | US4339828 Automatic method for advantageously trading signal distortion for improved noise threshold in frequency modulated receivers |
| 07/13/1982 | CA1127544A1 Sound system control |
| 07/08/1982 | WO1982002302A1 Variable capacitance circuit |
| 06/30/1982 | EP0054608A1 Active tone control circuit of a transistor hearing apparatus amplifier with two or more stages |
| 06/01/1982 | CA1124653A1 Frequency characteristic-adjusting apparatus |
| 05/26/1982 | EP0052544A1 Tone control circuit |
| 05/26/1982 | EP0052415A2 Frequency characteristic adjusting apparatus |
| 05/25/1982 | CA1124339A1 Amplitude equalizer circuit |
| 05/04/1982 | US4328465 Tone control circuit utilizing variable gain amplifier |
| 04/27/1982 | US4327331 Audio amplifier device |
| 04/27/1982 | US4327250 Dynamic speaker equalizer |
| 04/21/1982 | EP0050067A1 Audio system |
| 04/20/1982 | US4326172 Tunable active high-pass filter |
| 04/15/1982 | WO1982001290A1 System for maximum efficient transfer of modulated audio frequency energy |
| 04/13/1982 | CA1121735A1 Dual mode music instrument amplifier |
| 04/06/1982 | US4323866 Filter circuit |
| 03/30/1982 | US4322641 Noise reduction system |
| 03/17/1982 | EP0047528A2 Video tone control circuit |
| 03/17/1982 | EP0047281A1 Automatic corrector for the frequency transmission characteristics of an electro acoustic channel |
| 03/02/1982 | CA1119261A1 Filter circuit |
| 02/16/1982 | US4316060 Equalizing system |
| 01/19/1982 | US4312020 Frequency response adjusting device for magnetic sound recorder |
| 12/30/1981 | EP0042441A1 Tone control circuit |
| 12/15/1981 | US4306201 Signal processing circuit |
| 12/15/1981 | US4306198 Filter circuit |
| 12/15/1981 | US4306113 Method and equalization of home audio systems |
| 12/01/1981 | US4303891 Monolithic integrated circuit with frequency dependent amplification |
| 11/17/1981 | US4301420 Frequency characteristic-adjusting apparatus |
| 10/27/1981 | US4297730 Magnetic recording and reproducing device |
| 09/29/1981 | US4292467 Control for audio receiver |
| 09/22/1981 | US4291276 Equalizer amplifier |
| 09/22/1981 | US4290335 High frequency roll-off circuit |
| 09/17/1981 | WO1981002658A1 Automatic corrector for the frequency transmission characteristics of an electro acoustic channel |
| 09/15/1981 | US4289928 Tone control arrangement for use in sound reproducing instruments |
| 09/08/1981 | US4288754 Filter circuit |
| 09/01/1981 | US4287391 Microphone assembly for speech recording using noise-adaptive output level control |
| 08/18/1981 | US4285065 Radio with audio graphic equalizer |
| 08/18/1981 | US4284965 Tone control device |
| 07/21/1981 | US4280102 Frequency response characteristic adjustable circuit |
| 07/14/1981 | US4279005 Method and system for automatically providing flat frequency response to audio signals recorded on magnetic tapes |
| 07/09/1981 | WO1981001922A1 Tone control circuit |
| 06/02/1981 | US4271398 Tone control device |
| 05/26/1981 | US4270221 Phaselocked receiver with orderwire channel |
| 05/26/1981 | CA1102000A1 Detection and monitoring device |
| 05/13/1981 | EP0028549A1 Filters tuned by switching, and their use in an equalizer of a magnetic recording device |
| 04/21/1981 | US4263624 Analog recording on magnetic media |
| 04/15/1981 | EP0026955A1 Electronic musical instrument having means for generating long reverberating sounds |
| 04/14/1981 | US4262260 Tone control circuitry |
| 01/13/1981 | US4245353 Amplitude tilt correction apparatus |
| 01/07/1981 | EP0022108A1 Means for improving the high frequency response in magnetic audio recording |
| 01/06/1981 | US4244056 Noise reduction circuit |
| 12/09/1980 | US4238766 Channel level adjusting apparatus |
| 12/09/1980 | CA1091163A1 Sound processing method and apparatus |
| 10/21/1980 | US4229716 Amplitude equalizer circuit |
| 10/07/1980 | US4227048 Audio signal transmission circuit having a constant level tone-controlled output signal |
| 09/30/1980 | US4225834 Equalizing network having a plurality of frequency sensitive attenuation branches in a negative feedback arrangement |
| 09/30/1980 | CA1086836A1 Rf amplifier |
| 09/09/1980 | US4221930 FM Defect compensation apparatus |
| 09/02/1980 | US4220931 Composite video automatic gain control amplifier |
| 09/02/1980 | US4220817 Audio playback systems |
| 07/08/1980 | US4211893 Dual mode music instrument amplifier |
| 07/01/1980 | US4210942 Video signal play-back circuit |
| 06/10/1980 | US4207543 Adaptive filter network |
| 06/03/1980 | US4206417 Sound system control |
| 05/28/1980 | EP0011446A1 A frequency characteristic-adjusting circuit |
| 04/29/1980 | US4200857 Variable resistor |
| 04/15/1980 | US4198543 Stereo composite processor for stereo radio receiver |
| 04/15/1980 | CA1075779A1 Frequency response equalizer with adjustable compensation circuit |
| 03/04/1980 | CA1073064A1 Trimming condenser for crystal driven oscillators with coarse and fine tuning |
| 01/29/1980 | US4186280 Method and apparatus for restoring aged sound recordings |
| 01/29/1980 | US4186274 Sound system control |
| 01/22/1980 | US4185168 Method and means for adaptively filtering near-stationary noise from an information bearing signal |
| 01/08/1980 | US4182930 Detection and monitoring device |
| 12/11/1979 | US4178551 Bandwidth switching circuits of radio receiver |
| 11/13/1979 | US4173941 Response tracer audio equalizer amplifier unit having graphic response display |
| 10/30/1979 | CA1065411A1 Automatic gain control circuit for radio receiver |
| 09/18/1979 | US4168472 Variable gain controller |
| 08/28/1979 | US4166197 Parametric adjustment circuit |
| 07/31/1979 | US4163264 Noise improvement by capacitor bank in magnetic recording and playback apparatus |
| 07/24/1979 | US4161945 Selective interference filter |
| 06/26/1979 | US4159460 Variable resistor |
| 04/24/1979 | US4151477 Tone control circuit |
| 03/27/1979 | US4146846 Amplifier having a high frequency boost network |
| 03/06/1979 | CA1050151A1 Method and apparatus for setting an aural prosthesis to provide specific auditory deficiency corrections |
| 01/09/1979 | US4134074 Dynamic transient response filter |
| 12/19/1978 | US4130727 Loudspeaker equalization |
| 12/19/1978 | US4130726 Loudspeaker system equalization |
| 11/21/1978 | CA1042991A1 Receiver with automatic pass band control |
| 11/07/1978 | US4124817 Bandwidth switching circuit for intermediate frequency amplifier stage in FM receiver |
| 10/10/1978 | US4119814 Hearing aid with adjustable frequency response |
| 10/03/1978 | US4118601 System and a method for equalizing an audio sound transducer system |
| 09/26/1978 | US4117413 Amplifier with multifilter |
| 09/26/1978 | US4117412 Phonograph preamplifier network with infrasonic cutoff response |
| 09/12/1978 | US4114117 Tunable electrical filter network |
| 09/12/1978 | US4113983 Input filtering apparatus for loudspeakers |