Audio power amplifier

Details Audio power amplifier Audio power amplifier

2006-12-06

2009-02-24

Mottola, Steven J (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S051000, C330S251000, C330S298000

Reexamination Certificate

active

07495509

ABSTRACT:
A smart protection circuit to prevent possible circuit malfunction or damage due to sudden power source voltage fluctuation is introduced. In case of quick and large voltage fluctuation in power supply, a control signal is activated to stop power transistor switching. When power supply is stable at a lower or higher operating voltage, the switching circuit is able to return to normal operation.

REFERENCES:
patent: 4427951 (1984-01-01), Amada et al.
patent: 7170339 (2007-01-01), Saito et al.
patent: 58-081311 (1983-05-01), None
patent: 4-108204 (1992-04-01), None
patent: 5-039095 (1993-05-01), None
English Language Abstract of JP 4-108204. Apr. 9, 2002.
English Language Abstract of JP 58-081311. May 16, 1983.
U.S. Appl. No. 11/465,152, to Wong et al., filed Aug. 17, 2006.
U.S. Appl. No. 11/536,221, to Higuchi et al., filed Sep. 28, 2006.

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