Summary

International Symposium on Electromagnetic Compatibility

2009

Session Number:22R1

Session:

Number:22R1-3

Study on EMC Problem of Medical Electronic Equipment Caused by Wideband Electromagnetic Wave Source

T. Uno,  K. Ichikawa,  H. Mizuno,  Y. Mabuchi,  

pp.453-456

Publication Date:2009/7/20

Online ISSN:2188-5079

DOI:10.34385/proc.14.22R1-3

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Summary:
A study was conducted on common-mode noise which is generated in the large-scale-integrated circuit (LSI) of an in-vehicle electronic device and flows through the printed circuit board (PCB) to the wiring harnesses. For a model circuit comprising an LSI, PCB and wiring harnesses, the model equation was solved to verify that common-mode noise in the wiring harnesses can be minimized by cancelling the unbalanced impedance of the LSI with respect to the ground plane using the impedances on the PCB. Test boards were fabricated, each containing a microprocessor adopted in actual electronic products, and experimental evaluation was conducted on these test boards to verify the effectiveness of this technique in reducing common-mode noise.