[SI-LIST] Re: Serpentine patterns for length matching

We have an article on our web site, part of the Mentor Graphics 
article series, called "Adjusting Signal Timing (Part 2)" that hits 
this topic head on. (You might find Part 1 of interest, also.)

The link is on
http://www.ultracad.com/article_outline.htm

Doug Brooks




At 08:21 AM 10/23/2008, otter30@xxxxxxxxxxxxx wrote:
>Hello,
>Does anyone know of general guidelines for the serpentine patterns 
>used to match net lengths?
>
>We have a board with lots of diff pairs, and our board designer made 
>the serpentines very
>tight. The separation between the adjacent bends of a pair is the 
>same as the spacing of the
>traces in the pairs themselves. This seems to imply imedance 
>variations if the trace widths
>don't change in the bends.
>
>Any insights would be greatly appreciated,
>Jim



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