Switching audio power amplifier with de-noise function

Details Switching audio power amplifier with de-noise function Switching audio power amplifier with de-noise function

2007-07-11

2009-02-10

Choe, Henry K (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S251000

Reexamination Certificate

active

07489190

ABSTRACT:
The invention provides a switching audio power amplifier with de-noise function including a pulse width modulator, a de-noise circuit and a bridge circuit. The pulse width modulator performs pulse width moderation to generate the first and second PWM signals according to an input audio signal. The de-noise circuit receives the first and second PWM signals. And the bridge circuit conducts a driving current alternately flowing to and from a load according to the control signals output from the de-noise circuit.

REFERENCES:
patent: 6998911 (2006-02-01), Honda et al.
patent: 7315202 (2008-01-01), Tsuji
patent: 7332962 (2008-02-01), Wu et al.

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