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Article: Mutual understanding. (eliminating crosstalk in bus connectors)
- Article from:
- EDN
- Article date:
- January 1, 1998
- Author:
CopyrightCOPYRIGHT 1998 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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"Whenever we execute this piece of code, the processor goes crazy." Sound familiar? This problem may involve crosstalk in your connectors. In large systems, especially those comprising multiple circuit cards, wide, fast bus structures must traverse connectors at many points. As bus signals pass through the connectors, the driven signals, or "aggressors," couple some of their energy onto the other signals, or "victims."
In a good connector, the crosstalk is small, even for adjacent pins, and it decreases rapidly as the victim pin moves farther from the aggressor. You can directly observe this effect with the following simple test setup. Your test setup must stimulate ...