Common-mode currents and printed circuit boards [EMC]

F.B.M. Horck, van, A.P.J. Deursen, van, P.C.T. Laan, van der

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Abstract

Common-mode (CM) currents through cables attached to printed circuit boards (PCB's) are often the main cause of interference and may even dominate the direct radiation of the board. In this paper, the authors predict the coupling between the differential-mode (DM) circuit on the board and the CM circuit in a Bersier setup, by means of a rapid transmission-line model. This coupling is expressed as the ratio of the CM current and the DM current. Several boards with different complexity were studied in the frequency domain. For demonstration purposes a board with modern digital electronics was developed. Measurements between 100 kHz-1 GHz agree with the TL models
Original languageEnglish
Title of host publicationProceedings of 13th International Zurich Symposium on Electromagnetic Compatability. Zurich, Switzerland. 16-18 Feb. 1999
Place of PublicationZurich, Switzerland
PublisherSwiss Federal Inst. Technol
Pages227-
ISBN (Print)3952119938
Publication statusPublished - 1999

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    Horck, van, F. B. M., Deursen, van, A. P. J., & Laan, van der, P. C. T. (1999). Common-mode currents and printed circuit boards [EMC]. In Proceedings of 13th International Zurich Symposium on Electromagnetic Compatability. Zurich, Switzerland. 16-18 Feb. 1999 (pp. 227-). Zurich, Switzerland: Swiss Federal Inst. Technol.