Audio processing circuit

Abstract

The invention provides an audio processing circuit. The audio processing circuit comprises an audio input end, a first isolating circuit, an amplifying circuit, an audio output end, a detective control circuit and a regulating circuit. The first isolating circuit conducts direct-current isolation on a to-be-processed audio signal of the audio input end to acquire a to-be-amplified audio signal. The amplifying circuit conducts amplifying processing on the to-be-amplified audio signal output by the first isolating circuit to acquire a processed audio signal, and the processed audio signal is output through the audio output end. The detective control circuit detects the processed audio signal and correspondingly outputs a control signal to the regulating circuit, the regulating circuit is controlled by the control signal and regulates the to-be-amplified audio signal output by the first isolating circuit or the to-be-processed audio signal output by the audio input end to regulate the amplification coefficient of the audio processing circuit. The audio processing circuit is good in audio processing effect.

Description

technical field [0001] The invention relates to an audio processing circuit. Background technique [0002] Audio processing circuits are usually used to amplify and process audio signals, and are widely used in various electronic devices with audio output, such as mobile phones, MP3, MP4 players, notebook computers, stereos, etc. [0003] When the existing audio processing circuit amplifies the audio signal, its amplification factor is often fixed. Specifically, if the amplification factor of the audio processing circuit is β, the audio processing circuit amplifies all output audio signals by β times before outputting them. Usually, due to the high and low volume, the amplitude of the audio signal changes greatly. For the audio signal with a large amplitude, it only needs to be amplified with a small coefficient; for the audio signal with a small amplitude, a large coefficient is required. zoom in. However, when the amplification factor β of the audio processing circuit i...

AI Technical Summary

Problems solved by technology

However, when the β of the amplification factor of the audio processing circuit is large, it is often unable to meet the amplification requirements for audio signals with large amplitudes.

As a result, the processing effect of the existing audio processing circuit on the audio signal is not good, and it is difficult to meet the increasing needs of people.

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