Method for measuring the saturation rate of an audio amplifier

Details Method for measuring the saturation rate of an audio amplifier Method for measuring the saturation rate of an audio amplifier

2010-03-31

2011-11-08

Nguyen, Khanh (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S20700P

Reexamination Certificate

active

08054130

ABSTRACT:
A method and corresponding circuit that adjusts the gain of an audio output stage having a class D amplifier, this method including the steps of setting the gain to a nominal value, analyzing an output signal during successive clock periods, counting the number of clock periods during which the signal is in a state corresponding to a saturation, decreasing the gain if the number reaches, before the end of a first time interval, a value corresponding to a first percentage, maintaining the gain constant if, at the end of a second time interval, different from the first interval, the number corresponds to a second percentage being comprised between the first percentage and a third percentage, and increasing the gain if, at the end of the second time interval, the number corresponds to a fourth percentage, lower than the third percentage.

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patent: 1128549 (2001-08-01), None

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