摘要
文中采用一种随机扩频调制的新方法来降低DC/DC转换器的EMI,对其原理及具体实现电路进行了研究,并通过仿真验证了该方法的有效性。该方法首先通过数字电路产生随机信号然后调制振荡器的充电电流,从而令原来固定的开关频率扩展,使其频谱幅值降低,实现了低EMI的目的。
In this paper,a new method of random spread spectrum technology is used to reduce the EMI of DC/DC converter,the principle and implementation circuit are studied,and the validity of the method is verified by simulation.First through the digital circuit this method generates a random signal and then modulates the oscillator charging current,so that the original fixed switching frequency expand,which decreases the spectral amplitude and lows EMI.
作者
刘晓艳
LIU Xiao-yan(Xi＇an Electronic and Science University, Xi＇an 710071, China)
出处
《通信电源技术》
2017年第4期70-70,76,共2页
Telecom Power Technology
关键词
随机扩频技术
EMI
仿真
random spread spectrum technology
EMI
simulation
