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Measurements and Modelling of Delay Lines on Printed Circuit Boards

Author(s):
Jose M. Cruz and Scott D. Powers
Report Number: Date Published: Available Formats:
TR-2000-92 September 2000 Portable Document Format (PDF)
Postscript (PS)
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Abstract

Traces on printed circuit boards (PCBs) are often turned into meandering lines to introduce an additional delay. This technical report explores the electrical parasitics involved in that practice by reporting measurements of traces fabricated on a test board. Traces that meander have shorter propagation delays than expected due to coupling between segments. Calculations of the time delay reduction are presented and a model is proposed.