1、 音频功率放大电路设计音频功率放大电路设计 学院名称： 专 业： 班 级： 姓 名： 指导教师姓名： 指导教师职称： 2012 年 6 月 音频功率放大电路设计 摘要：本文所介绍的由单片机控制的音频放大电路，具有操作方便，音质效果 好等特点。而且，整个音频放大器驱动电压范围广，从 5V 到 15V 均可做为音频 功率放大电路的驱动电源。 本电路采用 TDA2030 作为功率放大器，工作电压是 +15v。它将输入的电流进行放大，然后驱动喇叭工作。TDA2030 具有体积小，输 出功率大，失真小等特点，功率放大器内含多种保护电路，工作安全可靠性高。 本电路通过LF353对音频信号进行前级放大， 通
2、过DAC0832对前级放大进行控制， 并通过键盘输入由 STC89C52 单片机对放大倍数进行控制由液晶显示放大倍数。 关键词: DAC0832；TDA2030；音频放大器 ；功率 The Design of Audio Power Amplifier Abstract: This paper introduces the microcomputer controlled by the audio amplification circuit, has the advantages of convenient operation, perfect sound quality characteri
3、stics. Moreover, the audio amplifier driving voltage range is wide, from 5V to15V can be used as an audio power amplification circuit for the driving power supply. The circuit uses TDA2030 as the power amplifier, the operating voltage is +15v. It will be the input current is amplified, then drives a
4、 loudspeaker to work. TDA2030has the advantages of small volume, high output power, low distortion characteristics, power amplifier containing a variety of protection circuit, high operating safety. The circuit through the LF353for audio signal preamplifier, through DAC0832 on the preceding stage amplifying control, and through the keyboard input by the STC89C52 chip amplification control is composed of a liquid crystal dis
