| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
|---|
| 10/06/1987 | US4698842 Audio processing system for restoring bass frequencies |
| 09/16/1987 | EP0237203A2 Hearing aid circuit |
| 09/15/1987 | US4694498 Automatic sound field correcting system |
| 09/09/1987 | EP0235848A1 Automatically controlled amplifier arrangement |
| 09/01/1987 | US4691362 Dihedral loudspeakers with variable dispersion circuits |
| 09/01/1987 | US4691171 Integrated RC filter with resistor trimming |
| 08/18/1987 | US4688258 Automatic graphic equalizer |
| 08/04/1987 | US4684899 Audio amplifier for a motor vehicle |
| 08/04/1987 | US4684886 Automatic equalizer |
| 07/30/1987 | WO1987004578A1 Noise-removing device |
| 07/28/1987 | US4683589 Electronic audio system |
| 06/19/1987 | DE3543338A1 Graphic equalizer |
| 06/16/1987 | CA1223050A1 Equalizer networks and methods of developing scaling coefficients therefor |
| 06/09/1987 | US4672671 Audio frequency signal preamplifier for providing controlled output signals |
| 04/29/1987 | EP0219865A2 System and method for controlling tone quality |
| 04/28/1987 | US4661982 Digital graphic equalizer |
| 04/22/1987 | EP0218912A2 Special effects device for an electronic musical instrument |
| 04/14/1987 | US4658286 Method and apparatus for correcting distortions in reproducing systems |
| 04/01/1987 | EP0215951A1 Graphic balancer |
| 03/12/1987 | DE3530674A1 Sound reproduction system with remotely controlled tone setting |
| 03/10/1987 | US4649565 Electro-acoustic converter with compensated frequency response characteristic |
| 03/03/1987 | US4648117 Mobile sound field correcting device |
| 02/17/1987 | US4644292 Automatic gain and frequency characteristic control unit in audio device |
| 02/03/1987 | US4641344 Audio equipment |
| 01/28/1987 | EP0209931A2 Equaliser with adjustable band filters and a digital filter suitable for use in the equaliser |
| 01/20/1987 | US4638506 Sound field simulation system and method for calibrating same |
| 01/20/1987 | US4638258 Reference load amplifier correction system |
| 01/14/1987 | EP0208474A2 Automotive sound system |
| 01/14/1987 | EP0208433A2 Response-gain independent amplifier |
| 12/30/1986 | US4633200 Voltage controlled equalizer |
| 12/30/1986 | US4633189 NF tone control circuit |
| 12/23/1986 | US4631749 ROM compensated microphone |
| 12/16/1986 | US4629995 Variable emphasis circuit |
| 12/09/1986 | US4628530 Automatic equalizing system with DFT and FFT |
| 12/09/1986 | CA1215136A1 Optical receiver circuit |
| 11/25/1986 | US4625328 Integrated amplifier and speaker system with improved cooling efficiency |
| 11/11/1986 | US4622691 Mobile sound field correcting device |
| 11/11/1986 | US4622660 Systems and methods for signal compensation |
| 10/14/1986 | CA1212776A1 Analog and digital signal apparatus |
| 09/16/1986 | US4612665 Graphic equalizer with spectrum analyzer and system thereof |
| 09/02/1986 | US4610024 Audio apparatus |
| 08/28/1986 | WO1986005059A1 Graphic balancer |
| 08/27/1986 | EP0192122A1 Audio amplifier for a motor car |
| 08/27/1986 | EP0191784A1 Optical receiver circuit. |
| 08/20/1986 | CN86100364A Graphic balancer |
| 08/19/1986 | CA1210095A1 Automatic equalizing system with dft or fft |
| 07/22/1986 | US4602337 Analog signal translating system with automatic frequency selective signal gain adjustment |
| 07/01/1986 | US4598426 Variable intermediate bandwidth AM receiver |
| 06/24/1986 | CA1206543A1 Tunable active filter |
| 05/27/1986 | US4591805 Adaptive bandwidth amplifier |
| 05/21/1986 | EP0181608A1 Reference load amplifier correction systemand method |
| 05/13/1986 | US4589136 Circuit for suppressing amplitude peaks caused by stop consonants in an electroacoustic transmission system |
| 04/29/1986 | USRE32132 Video signal play-back circuit |
| 04/23/1986 | EP0178936A2 Variable emphasis circuit |
| 04/22/1986 | CA1203584A1 Electronic gain-control arrangement |
| 04/02/1986 | EP0176459A1 Ear phone, telephone handset and head phones for correcting individual hearing deficiencies |
| 04/01/1986 | US4580237 Digital tone control arrangement |
| 03/25/1986 | US4578809 Dihedral loudspeakers with variable dispersion circuits |
| 02/27/1986 | WO1986001354A1 Optical receiver circuit |
| 02/25/1986 | CA1201070A1 Adaptive signal weighting system |
| 02/04/1986 | US4568886 Amplitude compensated variable bandwidth filter |
| 02/04/1986 | US4568840 Variable resistance circuit |
| 01/21/1986 | US4566119 Equalizer networks and methods of developing scaling coefficients therefor |
| 01/21/1986 | US4565974 Optical receiver circuit with active equalizer |
| 01/14/1986 | US4564869 Zoned equalization for a magnetic disc |
| 01/07/1986 | US4563651 FM Demodulator with variable bandpass filter |
| 01/02/1986 | EP0166543A2 Mobile sound field correcting device |
| 12/27/1985 | EP0165733A2 Method and apparatus for measuring and correcting acoustic characteristic in sound field |
| 12/18/1985 | EP0164973A2 Mobile sound field correcting device |
| 12/17/1985 | US4559569 Circuit arrangement for correcting frequency response in accordance with frequency response of a sound field |
| 12/17/1985 | CA1198060A1 Method and apparatus for operating a loudspeaker below resonant frequency |
| 12/04/1985 | EP0163545A2 Automatic gain and frequency characteristic control unit in audio device |
| 12/04/1985 | EP0163333A1 Filter arrangement |
| 11/06/1985 | EP0160431A2 Sound field correction system |
| 10/30/1985 | EP0159546A1 Digital graphic equalizer |
| 10/22/1985 | US4549289 Method for correcting acoustic distortion |
| 10/08/1985 | US4545258 Circuit with adjustable amplitude and rolloff frequency characteristics |
| 09/03/1985 | US4539526 Adaptive signal weighting system |
| 08/27/1985 | US4538298 Fixed bandpass tone controlling |
| 08/20/1985 | CA1192275A1 Circuit for amplifying and/or attenuating a signal |
| 07/23/1985 | US4531148 High sensitivity FM signal demodulation system |
| 07/17/1985 | EP0148249A1 Circuit with adjustable amplitude and rolloff frequency characteristics |
| 07/09/1985 | CA1190289A1 Fm signal demodulation system |
| 07/02/1985 | US4527187 High sensitivity FM signal demodulation system |
| 07/02/1985 | CA1189959A1 High sensitivity fm signal demodulation system |
| 07/02/1985 | CA1189958A1 High sensitivity fm signal demodulation system |
| 06/18/1985 | US4524422 Digital equalizer capable of varying the center frequency, quality factor, and gain to perform various frequency characteristics |
| 06/11/1985 | US4523156 Anti-distortion anti-transient tone control circuit |
| 05/28/1985 | US4519397 Pulse detector |
| 05/07/1985 | US4516078 Variable frequency passband circuit |
| 04/30/1985 | US4514702 Logarithmic electronic gain control circuit |
| 04/24/1985 | EP0138548A2 Analog-to-digital encoder and digital-to-analog decoder |
| 04/24/1985 | EP0138547A2 Spectral emphasis and de-emphasis circuits |
| 04/02/1985 | US4509021 Circuit for amplifying and/or attenuating a signal |
| 04/02/1985 | US4509019 Tunable active filter |
| 03/26/1985 | US4507791 Analog and digital signal apparatus |
| 03/12/1985 | US4504968 Equalizer apparatus having two dimensional display |
| 02/19/1985 | US4501015 Apparatus for electroacoustic energy conversion |
| 01/31/1985 | WO1985000478A1 Circuit with adjustable amplitude and rolloff frequency characteristics |
| 01/30/1985 | EP0042441B1 Tone control circuit |