文章摘要
顾爱民.一种降低D类功率放大器开关噪声的设计[J].声学技术,2020,39(2):257~260
一种降低D类功率放大器开关噪声的设计
A design for reducing switching noise of Class-D power amplifier
投稿时间:2019-09-02  修订日期:2019-12-30
DOI:10.16300/j.cnki.1000-3630.2020.02.022
中文关键词: 开关噪声  Σ-△调制  D类功率放大器
英文关键词: switching noise  Σ-Δ modulation  Class-D power amplifier
基金项目:研究所内部基金(170623)
作者单位E-mail
顾爱民 上海船舶电子设备研究所, 上海 201108 guaimin1@126.com 
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中文摘要:
      传统D类功率放大器因特有的开关噪声对水下电子设备的信号接收、通信控制和信号传输等电信号产生很大的干扰,限制了D类功率放大器在水下电子设备中的广泛应用针对这一现象,首先阐明了Σ-△调制的D类功率放大器降低开关噪声的原理,然后对传统调制方式和Σ-△调制方式的D类功率放大器进行原理分析,并在Simulink软件中进行仿真对比。仿真结果表明,传统D类功率放大器在开关频率处的开关噪声能量高,Σ-△调制的D类功率放大器的开关噪声能量分散在一定的带宽内,并且开关噪声能量峰值低于传统D类功率放大器。
英文摘要:
      The switching noise accompanying in traditional Class-D power amplifier operation limits its wide application in underwater equipment due to its bad impacts on signal reception, communication control and signal transmission. In view of this phenomenon, this paper first explains the principle of reducing switching noise of Class-D power amplifier by using Σ-Δ modulation, and then analyzes and compares the principles of Class-D power amplifier modulated by traditional PWM and Σ-Δ modes with Simulink software. The simulation results show that the traditional Class-D power amplifier generates high energy switching noise at the switching frequency, and the Σ-Δ modulated Class-D power amplifier makes the switching noise energy dispersing in a certain bandwidth, so that the peak energy of switching noise is lower than that of the traditional PWM modulation mode.
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