| Patents for H03G 5 - Tone control or bandwidth control in amplifiers (3,156) |
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| 02/14/1995 | CA2048234C Audio dosage control system |
| 02/12/1995 | CA2129567A1 Fast-acting automatic gain control arrangement |
| 02/08/1995 | CN1098539A Sound system gain and equalization circuit |
| 02/07/1995 | US5388161 Tone adjusting apparatus for audio signals |
| 02/07/1995 | US5388159 Equalizing circuit for reproduced signals |
| 01/31/1995 | US5386478 Sound system remote control with acoustic sensor |
| 01/25/1995 | EP0635937A1 Circuit for controlling the overall upper cutoff frequency of an amplifier stage |
| 01/24/1995 | US5384856 Acoustic system |
| 01/17/1995 | US5382920 Circuit arrangement for an optical receiver |
| 01/04/1995 | EP0632587A2 Distortion-free limiter for a power amplifier |
| 01/04/1995 | EP0632585A1 System for the bias control of an amplifier |
| 01/04/1995 | EP0632583A1 Variable gain amplifier |
| 12/31/1994 | CA2126919A1 System for controlling the bias voltage applied to an amplifier |
| 12/28/1994 | EP0631383A2 Acoustic reproduction systems |
| 12/27/1994 | US5377277 Process for controlling the signal-to-noise ratio in noisy sound recordings |
| 12/22/1994 | WO1994029955A1 Bridge-tap equalizer method and apparatus |
| 12/22/1994 | CA2140359A1 Bridge-tap equalizer method and apparatus |
| 12/20/1994 | US5374896 Distortion compensating circuit of high-frequency power amplifier |
| 12/14/1994 | EP0629053A1 Circuit for detecting and rejecting adjacent channel interference |
| 12/13/1994 | US5373251 Transmission output amplifier |
| 12/07/1994 | EP0627814A1 Digital circuit to regulate the gain of an amplifier stage |
| 12/07/1994 | EP0595856A4 Adaptive graphic equalizer and radio using same. |
| 11/29/1994 | US5369710 Sound field correcting apparatus and method |
| 11/17/1994 | EP0624947A2 Acoustic characteristic correction device |
| 11/08/1994 | US5363069 For RF frequencies of various attenuation profiles |
| 11/02/1994 | EP0622896A1 Sound system gain and equalization circuit |
| 11/01/1994 | US5361306 Apparatus and methods for enhancing an electronic audio signal |
| 10/29/1994 | CA2121299A1 Sound system gain and equalization circuit |
| 10/26/1994 | EP0621687A2 Audio amplifier arrangement |
| 10/25/1994 | US5359665 Audio bass frequency enhancement |
| 10/19/1994 | EP0620639A1 Variable gain amplifier for low supply voltage |
| 10/04/1994 | US5353244 Computer controlled transversal equalizer |
| 10/04/1994 | US5352988 Automatic gain controller |
| 09/21/1994 | EP0616425A1 Audio amplifier arrangement |
| 08/31/1994 | EP0613239A1 Audio amplifier arrangement |
| 08/23/1994 | US5341108 Amplifier biasing circuit |
| 08/16/1994 | US5339455 Radio receiver adjacent-channel interference suppression circuit |
| 08/10/1994 | EP0609665A1 Circuit for digital processing of audio signals |
| 08/09/1994 | US5337368 Frequency control system in an audio device |
| 08/02/1994 | CA2027364C Varying bandwidth digital signal detector |
| 07/26/1994 | US5333203 Reverb and selectable tremolo and vibrato electron tube preamplifier |
| 07/05/1994 | US5327102 Sound recording apparatus |
| 07/05/1994 | US5327101 Distortion-free limiter for a power amplifier |
| 07/05/1994 | US5327096 Control circuit for automatically controlled feed forward nonlinear distortion compensation amplifier |
| 06/29/1994 | EP0603970A1 Sound reproduction system as well as adjusting circuit to be used in such a system |
| 06/29/1994 | EP0603867A1 Distortion compensating circuit of high-frequency power amplifier |
| 06/28/1994 | US5325440 Loudness control circuit |
| 06/21/1994 | US5323457 Circuit for suppressing white noise in received voice |
| 06/01/1994 | DE4239758A1 Automatic interference signal suppression in FM receiver - reducing IF band width in dependence on degree of interference outside useful information channel |
| 05/31/1994 | US5317277 Power amplifying apparatus for supplying A.C. signals having a maximum loop gain at a desired frequency |
| 05/25/1994 | EP0597905A1 Intermodulation controller for radio receiver. |
| 05/24/1994 | US5315268 Audio power amplifier |
| 05/19/1994 | DE4335739A1 Automatically controlling signal=to=noise ratio of noisy recordings |
| 05/11/1994 | EP0595856A1 Adaptive graphic equalizer and radio using same |
| 05/10/1994 | CA2021380C Equalizing and amplifying circuit in an optical signal receiving apparatus |
| 04/19/1994 | US5305388 Bass compensation circuit for use in sound reproduction device |
| 04/12/1994 | US5303413 AM radio receiver with switchable IF bandwidth |
| 04/12/1994 | US5302860 Transmission system |
| 03/29/1994 | US5299003 Signal processing apparatus for changing the frequency characteristics of an input signal |
| 03/23/1994 | EP0588424A1 Buest control in a power amplifier for a TDMA communication system |
| 03/23/1994 | EP0587965A1 Differential transconductance stage, dynamically controlled by the input signal's amplitude |
| 03/23/1994 | EP0253902B1 Noise reduction apparatus and method |
| 03/22/1994 | US5297212 Loudspeaker system installed on an automobile door and including a woofer and a tweeter |
| 03/22/1994 | US5297075 Computer controlled transversal equalizer |
| 03/08/1994 | US5293311 Apparatus and a method for changing a resolution value of input musical data |
| 03/02/1994 | EP0584346A1 Loudspeaker arrangement with frequency dependent amplitude regulation |
| 02/23/1994 | EP0583492A1 Audio signal bass frequency enhancement device |
| 01/25/1994 | US5282252 Audio equalizer providing reciprocal equalization plus infinite-depth notch |
| 01/20/1994 | WO1993003550A1 Intermodulation controller for radio receiver |
| 01/12/1994 | EP0578389A2 Audio amplifier circuit and method of operation |
| 01/12/1994 | EP0578008A1 Vehicular radio receiver with speed compensated tone control |
| 01/11/1994 | US5278700 Differentiating amplifier responsive to track locations and variations of element values from desired values |
| 01/04/1994 | US5276403 Nonlinear preemphasis-deemphasis system |
| 12/29/1993 | CN1023367C Controlled slew rate amplifier |
| 12/14/1993 | US5270481 Filter coefficient generator for electronic musical instruments |
| 12/01/1993 | EP0571747A2 Circuit arrangement for an optical receiver |
| 12/01/1993 | EP0571635A1 Device for correcting frequency characteristic of sound field |
| 11/25/1993 | WO1993023922A1 Local area network amplifier for twisted pair lines |
| 11/16/1993 | US5263188 In a vehicle sound system |
| 11/16/1993 | US5263184 Noise reducing circuit for a receiver using a fuzzy controller |
| 10/27/1993 | EP0567265A1 Radio receiver |
| 10/27/1993 | EP0567134A1 Frequency control system in an audio device |
| 10/26/1993 | US5257313 Surround audio apparatus |
| 10/26/1993 | US5257292 Circuit arrangement for influencing the frequency response of a digital audio signal |
| 10/19/1993 | US5255323 Digital signal processing device and audio apparatus using the same |
| 09/30/1993 | DE4307008A1 Acoustic field corrector using cascaded delay circuits - operates by addn. of outputs of cascaded combinations of echo-generating delay stages and coefft. multipliers |
| 09/29/1993 | EP0561881A1 Compensating filters |
| 09/22/1993 | EP0561117A1 Circuit for detection and suppression of adjacent channel interference in a broadcast receiver |
| 09/16/1993 | WO1993018626A1 Loudspeaker arrangement with frequency dependent amplitude regulation |
| 09/14/1993 | US5245296 Audio amplifier circuit and method of operation |
| 09/01/1993 | EP0557929A1 Control circuit for automatically controlled feed forward nonlinear distortion compensation amplifier |
| 08/31/1993 | US5241696 Tuner with selective equalization of different program sources |
| 08/31/1993 | US5241605 Tone control apparatus for front and rear channels |
| 08/25/1993 | EP0556902A1 AGC circuit |
| 08/25/1993 | EP0556867A1 Digital equalizer apparatus enabling separate phase and amplitude characteristic modification |
| 08/18/1993 | EP0555748A1 Amplifier stage with negative feedback |
| 08/11/1993 | EP0554962A1 Tone control circuitry having a frequency characteristic dependent on the input signal level |
| 07/22/1993 | DE4244630A1 Amplifier with narrow band, IF filter - picks up harmonic heterodyne wave adjacent to required signal |
| 07/21/1993 | EP0551530A1 Amplifier biasing circuit suitable for a ring-trip detection system |
| 07/20/1993 | US5229734 Filter with adjustable edge steepness |