SOURCE DISTORTION PROTECTION CIRCUIT

摘要

PURPOSE: A circuit for prevention of distortion of original sound is provided which detects the output of a power amplifier and only the part with respect to original sound distortion of an input signal using a differential amplifier and feeds the detected signal back to the input port of the power amplifier, to eliminate original sound distortion without affecting the total gain or frequency characteristic. CONSTITUTION: A circuit for prevention of distortion of original sound includes a distortion feedback part(40) and a power amplifier(20). The distortion feedback part compares the output of the power amplifier with the level of an input signal to detect only distortion part. The power amplifier amplifies the output of the distortion feedback part and the output signal of a pre-amplifier(10). The power amplifier controls the output signals not to bias to one side.