Techniques for reducing CompactPCI backplane EMI

CompactPCI AdvancedTCA and MicroTCA Systems — May 13, 1999

Articles, Special Feature: May 1999The high-speed IC’s used in today’s high-performance CompactPCI systems inject high-current, high-frequency transients into the backplane’s Vcc and ground planes. Unless the backplane is designed to provide adequate high frequency decoupling, these current transients will be converted to voltage transients that can easily propagate throughout the systems via PC board traces, and even out of the system via I/O cables. In this article Barry explains why traditional decoupling techniques are inadequate for today’s designs, and describes how to design backplanes that prevent transients from propagating throughout the system.

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