[SI-LIST] Serpentine patterns for length matching

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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