电子科技2012，Vol.25Issue(5)：17-19,23,4.
基于ΣΔ调制的D类放大器系统设计与仿真
System Design and Simulation of Class D Amplifier Using ΣΔ Modulator
高爱国1
作者信息
- 1. 中国人民解放军92853部队4分队,辽宁葫芦岛125106
- 折叠
摘要
Abstract
In view of the fact that pulse width modulation may cause electromagnetic interference（EMI） in Class D Amplifier,this article applies a five-order low pass Σ Δ modulator to A class D amplifier with a feedback loop structure.The output signal spectrum properties are studied by establishing a nonideal model of class D amplifier.Simulation results show that this model can reduce the noise and harmonic distortion in low frequency band,achieve higher signal-to-noise ratio in baseband.Its application in the class D amplifiers can improve the electromagnetic interference performance effectively compared with traditional pulse width modulation.关键词
D类放大器/ΣΔ调制/电磁干扰/功率谱密度Key words
class D amplifier/ΣΔ modulation/EMI/power spectrum density分类
信息技术与安全科学引用本文复制引用
高爱国..基于ΣΔ调制的D类放大器系统设计与仿真[J].电子科技,2012,25(5):17-19,23,4.
