H03G 9 - Combinations of two or more types of control, e.g. gain control and tone control

Patents for H03G 9 - Combinations of two or more types of control, e.g. gain control and tone control (1,150)
03/1990
03/07/1990	EP0356885A2 Frequency-compensated linear sliding band network
02/1990
02/21/1990	EP0354955A1 Improved multi-band programmable compression system.
02/14/1990	EP0354734A2 Non-linear amplifier and non-linear emphasis/deemphasis circuit using the same
01/1990
01/09/1990	US4893099 For an input signal
01/03/1990	EP0348888A2 Overflow speech detecting apparatus
12/1989
12/28/1989	DE3920028A1 Two-channel hearing aid with automatic game control of low signals
12/14/1989	DE3819376A1 Circuit arrangement for the suppression of noise
11/1989
11/21/1989	US4882762 Multi-band programmable compression system
10/1989
10/04/1989	EP0334842A1 Low noise and distortion fm transmission system and method
09/1989
09/26/1989	CA1261959A1 Automatic gain control for hearing aid
09/08/1989	WO1989008353A1 Improved multi-band programmable compression system
08/1989
08/30/1989	EP0330062A1 Radio receiver for a vehicle
08/29/1989	US4862118 Signal processing system using a compressor and an expander
08/24/1989	WO1989007860A1 Radio receiver for vehicles
07/1989
07/25/1989	CA1257930A1 A-d encoder and d-a decoder system
07/11/1989	CA1257338A1 Filter arrangement for an audio companding system
06/1989
06/27/1989	US4843626 Multiband limiter with automatic limiting threshold (ALT) compensation
06/06/1989	US4837832 Electronic hearing aid with gain control means for eliminating low frequency noise
05/1989
05/30/1989	US4835490 Circuit for automatically controlling the gain-bandwidth product of operational amplifiers
05/24/1989	EP0316839A1 Listening comfort enhancer in the presence of carrier fading in an FM/PM narrow-band receiver
03/1989
03/21/1989	US4815142 Noise reduction device in an electroacoustic system
03/09/1989	WO1989002199A1 Low noise and distortion fm transmission system and method
02/1989
02/07/1989	US4803732 Hearing aid amplification method and apparatus
01/1989
01/31/1989	US4801890 Circuit arrangements for modifying dynamic range using variable combining techniques
11/1988
11/22/1988	US4786879 Attenuator circuit employing bootstrapping
10/1988
10/19/1988	EP0287063A2 Circuit for automatically controlling the gain-bandwidth product of operational amplifiers
10/19/1988	EP0287057A2 Automatic loudness control circuit
09/1988
09/20/1988	CA1242270A1 Noise reduction circuit for television multi-channel sound
08/1988
08/23/1988	US4766395 Circuits to provide desired conductance characteristics using a FET
08/02/1988	CA1240028A1 Hearing aid amplification method and apparatus
08/02/1988	CA1239876A1 Variable emphasis circuit
07/1988
07/26/1988	US4760602 Variable preemphasis/deemphasis network
06/1988
06/21/1988	US4752960 Audio processing circuit
05/1988
05/19/1988	WO1988003695A1 Analogical system for noise reduction in magnetic recordings
05/10/1988	CA1236405A1 Spectral emphasis and de-emphasis
04/1988
04/19/1988	US4739514 Automatic dynamic equalizing
04/19/1988	US4739511 Hearing aid
04/06/1988	EP0262216A1 Sound encoding system
04/05/1988	US4736433 Circuit arrangements for modifying dynamic range using action substitution and superposition techniques
02/1988
02/18/1988	DE3627056A1 Circuit for dynamic compression or expansion in a useful-signal path
02/11/1988	WO1988001112A1 Sound compression and expansion circuit in a useful signal path
02/11/1988	DE3627055A1 Circuit for dynamic compression or expansion in a useful-signal path
01/1988
01/05/1988	US4718099 Automatic gain control for hearing aid
12/1987
12/09/1987	EP0248713A1 Background noise reduction device in an electroacoustic line-up
12/01/1987	US4710962 Signal control apparatus
11/1987
11/03/1987	US4704727 Low noise and distortion FM transmission system and method
11/03/1987	US4704726 Filter arrangement for an audio companding system
10/1987
10/22/1987	WO1987006423A1 Sound encoding system
10/20/1987	US4701722 Circuit arrangements for modifying dynamic range using series and parallel circuit techniques
10/13/1987	US4700362 A-D encoder and D-A decoder system
10/13/1987	US4700361 Spectral emphasis and de-emphasis
10/06/1987	US4698842 Audio processing system for restoring bass frequencies
09/1987
09/24/1987	DE3608964A1 Hearing aid amplifier
09/22/1987	US4696044 Dynamic noise reduction with logarithmic control
09/09/1987	EP0236122A2 Attenuator circuit employing bootstrapping
09/09/1987	EP0236076A2 Circuits for altering the dynamic range of audio signals
09/01/1987	US4691234 Noise reduction circuit for television multi-channel sound
08/1987
08/12/1987	EP0231721A2 Automatic gain control for hearing aid
08/04/1987	US4684899 Audio amplifier for a motor vehicle
07/1987
07/28/1987	US4683449 Noise reduction compression system controlled by compressed output components which are in-band
07/14/1987	US4680796 Sound encoding system
04/1987
04/29/1987	EP0220043A2 Circuits to provide desired conductance characteristics using a fet
04/28/1987	US4661981 Method and means for processing speech
04/28/1987	US4661851 Apparatus for reducing the effect of noise interference in audio companding system
03/1987
03/03/1987	US4647876 Extended response dynamic noise reduction system
03/03/1987	CA1218721A1 Noise reduction circuit and method
02/1987
02/17/1987	CA1218157A1 Analog and digital signal apparatus
02/03/1987	US4641361 Multi-band automatic gain control apparatus
01/1987
01/21/1987	CN86104008A Circuit arrangements for modifying dynamic range using action substitution and superposition techniques
01/14/1987	EP0208433A2 Response-gain independent amplifier
01/13/1987	CA1216525A1 Method and means for processing speech
12/1986
12/30/1986	EP0206746A2 Circuit arrangements for modifying dynamic range using series and parallel circuit techniques
12/30/1986	EP0206732A2 Circuit arrangements for modifying dynamic range using variable combining techniques
12/30/1986	EP0206731A2 Circuit arrangements for modifying dynamic range using action substitution and superposition techniques
12/16/1986	US4629995 Variable emphasis circuit
12/09/1986	US4628530 Automatic equalizing system with DFT and FFT
11/1986
11/18/1986	CA1214112A1 Noise reduction system
11/11/1986	US4622692 Noise reduction system
10/1986
10/21/1986	US4618834 Variable characteristics amplifier circuit
10/14/1986	CA1212776A1 Analog and digital signal apparatus
09/1986
09/02/1986	US4609878 Noise reduction system
08/1986
08/27/1986	EP0192122A1 Audio amplifier for a motor car
08/19/1986	CA1210095A1 Automatic equalizing system with dft or fft
07/1986
07/22/1986	CA1208138A1 Aurally sensitized flat frequency response noise reduction compansion system
07/15/1986	US4600902 For improving transmission of an analog signal
04/1986
04/23/1986	EP0178936A2 Variable emphasis circuit
04/08/1986	US4581587 Solid state electrical musical instrument amplifier
03/1986
03/18/1986	CA1202111A1 Hearing aids
03/04/1986	US4574389 Stereophonic receiver having a noise reduction control circuit
02/1986
02/25/1986	CA1201070A1 Adaptive signal weighting system
01/1986
01/21/1986	CA1199588A1 Signal conditioning system
12/1985
12/31/1985	US4562492 Noise reduction circuit
11/1985
11/06/1985	EP0160054A1 Hearing aid amplification method and apparatus
10/1985
10/15/1985	US4547741 Noise reduction circuit with a main signal path and auxiliary signal path having a high pass filter characteristic
10/15/1985	CA1195387A1 Noise reduction circuit
10/08/1985	US4545258 Circuit with adjustable amplitude and rolloff frequency characteristics
09/1985
09/03/1985	US4539526 Adaptive signal weighting system
08/1985
08/27/1985	US4538297 Aurally sensitized flat frequency response noise reduction compansion system
07/1985
07/17/1985	EP0148249A1 Circuit with adjustable amplitude and rolloff frequency characteristics
07/01/1985	EP0131033A4 Method and means for processing speech.

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