单片机与嵌入式系统应用2012，Vol.12Issue(10)：40-43,4.
数控D类功放系统的设计与分析
Design and Analysis of Digital Control Class D Amplifier System
摘要
Abstract
A Digital control class D amplifier system with both USB digital and analog audio interfaces is introduced. Using AT89C2051 as the main chip, the system adopts event scanning mode to control more efficiently. Through IZC bus TDA7449 chip realizes functions such as 16-step volume control, 16-step tone control, channel selection and mute control. Using mathematical model the Digital control class D amplifier has high efficiency and good tone control. LC second-order filter circuit is analyzed and designed so as to control total harmonic distortion of the amplifier within 0.5 %.关键词
D类功放/LC滤波器/高效率/高保真Key words
class D power amplifier/LC filter/high efficiency/high fidelity分类
信息技术与安全科学引用本文复制引用
黄春平..数控D类功放系统的设计与分析[J].单片机与嵌入式系统应用,2012,12(10):40-43,4.基金项目
“音响产品设计与装配”课程建设的研究与实践（项目编号：JYB1011）. （）
