A Study on the Combining Circuit of New Active EMI Filter

새로운 능동EMI필터의 결합회로에 관한 연구

  • Received : 2015.03.21
  • Accepted : 2015.05.22
  • Published : 2015.06.30


Conventional EMI filters have tried to use an active EMI filter as a series by the series connection of two EMI filters for CM and DM noise. However, the proposed filter is formed into one circuit by using the active EMI filter which is able to filter CM and DM noise components together. As a result, the active EMI filter showed the outstanding quality in mass and volume under 50% and electric characteristics have been compared to the passive EMI filter in approximately 150kHz~10MHz. Furthermore, the proposed circuit has simple circuit components by comparing with the series EMI filters, and electrical characteristics are similar. The noise have been attenuated to maximum 20dBuV.


Active EMI Filter;CM Noise;DM Noise


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