摘要
简要介绍了一款基于数字电位器max5389、既具有USB数字音频接口又具有模拟音频接口的音频控制电路。采用STC12C5052做为主控芯片,具有256阶的音量控制、声道选择、静音控制等功能;通过单独为单片机控制系统、显示系统,数字化音量控制系统、胆机提供电源;将数字地、模拟地分开等措施,使音频控制电路信噪比达到82dB。
This paper briefly introduces a digital audio interface, which is based on digital potentiometer max5389, which has both USB digital audio interface and analog audio interfaee. The STC12C5052 as a master chip, with 256 order volume control, channel selection, mute control functions; through the single chip eontrol system. It is shown that the system, digital volume control system, the gallbladder maehine power supply ; digital and analog ground separately measures, make the audio control eircuit of signal to noise ratio reached 82db.
出处
《电声技术》
2016年第12期30-33,共4页
Audio Engineering
基金
2015年度中山市科技局立项课题(2015B2327)
2014年度中山市科技局立项课题(2014A2FC386)
关键词
数字电位器
单片机
信噪比
Digital potentiometer
single chip microcomputer
signal to noise ratio
