D类高效音频功率放大器设计与实现  

Design and Realization of Class-D Audio Power Amplifier

作　　者：林萍[1] 

机构地区：[1]宁波大学阳明学院,浙江宁波315211

出　　处：《电脑与信息技术》2013年第6期32-35,共4页Computer and Information Technology

基　　金：宁波大学青年硕士基金(项目编号:SJ2004027)

摘　　要：随着便携式电子产品的普及,D类音频放大器以高效率、小体积的优点受到市场的青睐。文章设计了一款经典的D类高效率音频功率放大器。该系统主要由前级放大电路、带通滤波电路、PMW调制电路、驱动电路、功率放大电路、低通滤波电路组成。经过调试系统整体性能良好,效率超过90%。With the popularity of portable electronic products, class-D audio amplifier is favored by the market because of the advantages of high efficiency, small volume. This paper designed classic a high efficiency class-D audio power amplifier .The system is mainly composed of pre amplifier circuit, band pass filter circuit, PMW modulation circuit, driving circuit, power amplifying circuit and low pass filter circuit. The system has high performance and the efficiency is up to 90%.

关 键 词：D类功率放大器 PMW调制 H桥电路 

分 类 号：TN722[电子电信—电路与系统]