开关电源中30MHz～300MHz高频共模噪声干扰的抑制

The Restraint of the Common Mold Noise Interference of the Switch Power Supply inside 30～300MHzs High Frequency

开关电源的干扰主要有共模噪声干扰和差模噪声干扰两种,共模噪声干扰的频率范围比较宽,形成复杂,其中30～300MHz是最难抑制的频段.以一款通信用的开关电源为例,详细介绍了如何采用增加高频扼流圈的方法,对30～300MHz频段的噪声进行抑制.

The interference of the switch power supply has primarily two kinds of with the common mold and the differ mold noise interference, the frequency scope of the common mold noise interference comparison breadth, formation is complicated, among them 30-300 MHzs is the most difficult in the restraint of the segment of frequency.The text regard a switch power supply that correspondence use, detailed introduction how adopting the methods in increment high frequency common mold grip flow turn, proceeds to repress as the voice of noise for 30-300 MHzs frequency.