Audio amplifier with voltage limiting in response to...

Details Audio amplifier with voltage limiting in response to... Audio amplifier with voltage limiting in response to...

2005-07-05

2005-07-05

Mei, Xu (Department: 2644)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

C381S120000, C455S296000

Reexamination Certificate

active

06914987

ABSTRACT:
Audio signals are reproduced with consistent perception of total harmonic distortion even with varying spectral content of a particular audio signal without separately limiting different frequency bands within the audio signal. A distortion threshold representative of an amount of distortion to be allowed to be introduced by a power amplifier is determined in response to a frequency content of the audio signal. A distortion trigger compares a measured average distortion signal and the distortion threshold and reduces the controllable gain of the amplifier if the average distortion signal exceeds the distortion threshold.

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ST® Multifunction Quad Power Amplifier with Built-In Diagnostics Features, Model TDA7562, Nov., 2001.

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