电子与封装2012，Vol.12Issue(7)：41-44,4.
防破音D类音频功放的设计与应用
Design and Application of Non-clip Class-D Audio Power Amplifier
摘要
Abstract
With the popularization of multi-media portable devices, audio power amplifier has become a basic component of audio part. Class-D audio power amplifier is widely used because of its high efficiency and excellent characteristics. In portable devices, audio power amplifier will produce clipping distortion when the input music signal is over level or the voltage of battery is low. Non-clip technology will provide a perfect solution with automatic gain control. This paper analyzed the common Non-clip technology, and proposed the design and application of an improved AGC method in Class-D amplifier. The improved AGC method detects the distortion of output PWM signal, and automatically control the gain by the PWM waveform modulated by the Non-clip circuit, eventually realized the maximum output power without distortion.关键词
防破音/D类功放/压缩/限幅技术/自动增益控制Key words
non-clip/Class-D audio power amplifier/compression & limiting/AGC分类
信息技术与安全科学引用本文复制引用
杜虹,阮颐,刘燕涛..防破音D类音频功放的设计与应用[J].电子与封装,2012,12(7):41-44,4.
