Patent ID: 7855597
Filing Date: 2010-12-21
Classification: H03F

Abstract:
1. A class-D amplifier, used for pushing a two-terminal load according to a set of analog signals, comprising: a pulse-width modulation (PWM) circuit used for receiving and converting the set of analog signals into a set of in-phased PWM signals; a signal processing circuit electrically connected to the PWM circuit, the signal processing circuit receiving the set of PWM signals and generating a set of pulse signals, the set of pulse signals being attached to the set of PWM signals; and a driving amplifier circuit coupled between the signal processing circuit and the two-terminal load, the driving amplifier circuit receiving and amplifying the set of processed PWM signals, so as to drive the two-terminal load in a filterless way; wherein when there is a differential active state between the set of PWM signals, the set of pulse signals of the signal processing circuit prolong the differential active state of the set of differential PWM signals.