Class-D power amplifier for use as audio amplifier, has integral control circuit outputting integral signal by integrating error signal and steady-state negative feedback circuit processing output signal from controlled circuit

摘要

The amplifier (10) has an integral control circuit outputting an integral signal by integrating an error signal. A feedback control circuit generates and outputs a switching control signal whose logic state changes according to the logic state of an abnormal state detecting signal generated based on a monitoring signal. A steady-state negative feedback circuit receives and processes an output signal from a controlled circuit. An independent claim is also included for an amplification method of a class-D power amplifier.