Servo thick film for audio power amplifier

The utility model discloses a servo thick film for an audio power amplifier. The servo thick film for the audio power amplifier internally and structurally comprises a voltage sampling circuit, an anti-interference circuit, an over-voltage protecting circuit, an integrating comparator, a servo circuit, a wide band amplifier, a gain adjusting circuit and a bias circuit, wherein the output end of the gain adjusting circuit is connected with the wide band amplifier; the input end of the bias circuit is connected with the servo circuit; the output end of the bias circuit is connected with the wide band amplifier; a sampling signal is input in the input end of the voltage sampling circuit; the wide band amplifier comprises an audio signal input end and an audio signal output end. The servo thick film is a full-direct-current coupling wide band large dynamic range thick film circuit with a zero point servo circuit, is packaged by adopting an international standard, and integrates sampling, protecting, servo and amplifying; an internal amplifier is a direct current coupling wide band amplifier, and the conversion rate is 10V/mu s or above; a used power supply is a 15V dual-power-supply; pins are eight international standard plug connectors which are directly plugged in a single row.