Audio amplification device

Abstract

An audio amplification device includes a charge pump circuit and an operational amplifier. The charge pump circuit generates an output voltage when receiving a power-on reset signal. The operational amplifier has a first input terminal for receiving a first input signal, a second input terminal for receiving a second input signal, a third input terminal for receiving the output voltage, a fourth input terminal for receiving a switching signal output, and an output terminal. The operational amplifier generates an amplified signal at the output terminal according to the first and second input signals, the output voltage and the switching signal output and outputs the amplified signal to a load circuit. When a level of the power-on reset signal changes from a high logic level to a low logic level, the operational amplifier is controlled by the switching signal output to pull a potential of the output terminal to zero.

Dependencies are inferred from the claim text.