Patent ID: 7636446
Filing Date: 2009-12-22
Classification: H03F

Abstract:
1. A method of enabling auto-recovery of a class D audio amplifier after a short-circuit, comprising: sensing a switching signal at an output of the class D audio amplifier; sensing a mute signal coupled to the class D audio amplifier and the mute signal coupled to a digital computing device in a powered-on state and operatively connected to the class D audio amplifier; detecting a short-circuit in the class D audio amplifier when the switching signal indicates that the class D audio amplifier is not switching and the mute signal indicates that the class D amplifier is in an un-muted state; and providing a reset signal to a reset input of the class D audio amplifier without powering down the digital computing device when the short-circuit is detected in the class D audio amplifier, thereby recovering from the short-circuit without powering down the digital computing device.