[SI-LIST] Re: PCB tracks
- From: John Barnes <jrbarnes@xxxxxxxxx>
- To: PhilippeR@xxxxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Wed, 07 Aug 2002 09:15:07 -0400
Philippe,
If you are trying to hold the trace impedance constant, curved corners
do better than 45 degree corners only if the inside radius is greater
than 3 * trace_width. See page 107 of my book, Electronic System
Design: Interference and Noise Control Techniques (Prentice Hall, 1987).
I never felt it was worth the extra trouble on cards I've designed,
which have gone up to 133MHz bus speeds.
John Barnes
dBi Corporation
http://www.dbicorporation.com/
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