Electrical audio signal processing systems and devices – Including amplitude or volume control – Automatic
Patent
1990-12-26
1993-10-19
Dwyer, James L.
Electrical audio signal processing systems and devices
Including amplitude or volume control
Automatic
381 55, 381102, 381108, H03G 300, H03G 1100, H03G 900
Patent
active
052553248
ABSTRACT:
An audio system employs a microcontroller to supervise the operation of an audio system including a digitally controlled audio processor which controls at least a wideband and a narrowband gain for the audio signal. The narrowband gain may preferably comprise a bass boost to the audio signal. Clipping distortion of the audio signal is avoided by sensing clipping in a power amplifier and reducing the digital commands for the wideband gain and the narrowband gain according to a method which reduces narrowband gain in preference to the wideband gain. After the narrowband gain is reduced to a predetermined gain, the wideband gain may be reduced if clipping persists. When clipping ceases, the narrowband gain is likewise restored to its original gain in preference to restoring of the wideband gain.
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TDA7360 Data Sheet.
TDA7302 Data Sheet.
Abowd Peter S.
Brewer James E.
Raffaeli Frank W.
Chiang Jack
Dwyer James L.
Ford Motor Company
May Roger L.
Mollon Mark
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