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김동일(Dong Il Kim),장신자(Jang Sin Ja),정상욱(Sang Wook Jung) 한국해양대학교 해사산업연구소 2004 海事産業硏究所論文集 Vol.15 No.-
This paper deals with EMC filter for a personal computer(PC). A PC contains many sources of noise inside and out, with many connected cables. High noise levels are also emitted from the PC because of high-speed signals. So radiated noise from the computer body may sometimes cause problems. Therefore, we design and fabricate an electromagnetic compatibility (EMC) filter for PC, which is composed of feed-through capacitors and ferrite beads with high permeability. Through extensive test, the proposed EMC filter is shown to have excellent differential-mode and common-mode noises filtering characteristics above 30 ㏈ in the frequency band from 10 ㎒ to 1.5 ㎓. The immunity characteristics are improved more than 10 to 30 ㏈ over the frequency band from DC to 1.5 ㎓.