[SI-LIST] Selection of Minimum Coupled Length in Cadence SPECCTRAQuest

Hi SI Experts,
My question pertains to the use of Cadence SPECCTRAQuest software for 
performing crosstalk simulations.

The Default setting of Minimum Coupling Length is 300 mils, and I have 
been using 200 mils coupling length for my simulations.  However, I have 
observed that when there are short length bends in the net (say when the 
net travels around a via), these short lengths are treated as separate 
sections of the net (Cline segments).  If these sections are smaller than 
200 mils then they are not  included in the coupling calculation. Recently 
while simulating a design, I reduced the coupling length to 50 mils.  This 
resulted in fourfold increase in the crosstalk.

I would like to know if such phenomenon has been observed by other users 
too, and what is the coupling length they use in their simulations.

Thanks.


Regards, Ravinder
Server PCB Development
Hitachi Global Storage Technologies

Email: Ravinder.Ajmani@xxxxxxxxxxxxxx

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