Class-D amplifier

Details Class-D amplifier Class-D amplifier

2009-11-20

2010-12-21

Nguyen, Patricia (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S20700P, C330S251000

Reexamination Certificate

active

07855597

ABSTRACT:
The invention discloses a class-D amplifier, which is used for driving a two-terminal load according to a set of analog signals. The D-class amplifier includes a pulse-width modulation (PWM) circuit, a signal processing circuit and a driving amplifier circuit. The PWM circuit receives the set of analog signals and converts them into a set of PWM signals with identical phase. The signal processing circuit generates a set of pulse signals which are attached to the set of PWM signals respectively. The driving amplifier circuit is coupled between the signal processing circuit and the two-terminal load. The driving amplifier circuit receives and amplifies the set of PWM signals. According to the set of PWM signals, the driving amplification circuit drives the two-terminal in a filterless way.

REFERENCES:
patent: 6614297 (2003-09-01), Score et al.
patent: 6847257 (2005-01-01), Edwards et al.
patent: 7332962 (2008-02-01), Wu et al.
patent: 7545207 (2009-06-01), Chang et al.
patent: 7659789 (2010-02-01), Zhu et al.
patent: 7741902 (2010-06-01), Guo et al.
patent: 7795970 (2010-09-01), Kaya et al.

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