摘要
介绍了数字音频功率放大器的基本原理,并对其关键技术进行了详细论述。通过分析数字功率放大器芯片产品的发展动态,选用一套典型芯片研发了5.1声道全数字功率放大器,并结合单片机组成一个完整系统,从而向商业化应用推进。
This paper introduces the principle of digital audio amplifier,and dissertates the critical is-sues in detail.By comparing state-of-the-art technologies in this field,a5.1-channel fully digital audio power amplifier is developed with a typical chip set.This chip set is interfaced with and controlled by a micro-con troller,forming a complete system for commercial applications.
出处
《电声技术》
北大核心
2003年第4期32-35,共4页
Audio Engineering
关键词
数字音频
功率放大器
PWM
PCM
过采样
噪声整形
I^2C总线
低通滤波
pulse wide modulation
pulse code modulation
over sampling
noise shaping
inter-in-tegrated circuit bus
digital power amplifier
digital signal processor core
