摘要
在低源阻抗和高负载阻抗阻抗条件下,为增加信号EMI滤波器在中、高频段的插入损耗,参照阻抗失配时电源EMI滤波器拓扑结构选择方法,用电路设计的方法分析了滤波器元件参数及其寄生参数和源阻抗/负载阻抗对不同拓扑结构滤波器性能的影响,讨论了元件值对滤波器插入增益的影响。根据分析结果提出了适用于EMI信号滤波器拓扑结构及参数的选取原则。实验结果表明所提原则正确并达到预计的滤波效果。
In order to increase the insertion loss of the filter at middle- andhigh-band with mismatched impedance of low source impedance and high load impedance, in the light of the topology options design of the power supply EMI filter with mismatched impedance, Components and their parasitic parameters and source/load impedance on the performance of different filters topologies is analysed, how does the value of the components work on the filter insert gain is discussed. According to the analysis results the principles of selection of the signals EMI filter topology and parameters are brought forward. The results show that the principles mentioned are right and is expected to reach the filtering effect.
出处
《电子测量技术》
2009年第7期9-13,共5页
Electronic Measurement Technology
