麦克放大器自动增益控制电路的设计

Design of Automatic Gain Control Circuit for Microphone Amplifier

指出了随着AI应用快速进入现代人的生活,智能语音控制技术正迅速成为当代的一个技术热点,产品遍及儿童学习、智能音箱、会议系统、教育培训等。智能语音控制技术关键是语音的采集和识别,语音识别是在云端完成,而语音的采集在当地完成,所以麦克放大电路就是采集的前端。实际情况中,人的声音有大有小、离麦克的距离有近有远。麦克(MIC)放大电路的自动增益控制(AGC)就非常重要和有必要,为此,给出了麦克放大器自动增益控制电路的设计,并进行了实物测试,以供参考。

With the rapid entry of AI applications in modern life,intelligent voice control technology has rapidly become a current technology hotspot.The products cover children’s learning,intelligent speakers,conference systems,education and training,etc.The key to intelligent voice control technology is the collection and recognition of voice.Voice recognition is completed in the cloud,and voice acquisition is completed locally.So the microphone amplifier circuit is the front end of the acquisition.In fact,human voice is large or small,and the distance from the microphone is far or near.The automatic gain control(AGC)of the microphone(MIC)amplifier circuit is very important and necessary.This paper discusses the design of the automatic gain control circuit of the microphone amplifier.