[SI-LIST] : VIA Coupling Calculations

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From: Erich Heinemann/Beaverton/IBM (ejheinem@us.ibm.com)
Date: Mon Oct 30 2000 - 10:08:50 PST


Hello Everyone,

I have been using Ansoft to get values for Via coupling, self and mutual
Inductance and capacitance. The only problem is that it takes a lot of
time to perform new simulations each time I need values. I was wondering
if anyone new of any hand calcuations that can be used to find the self and
mutual inductance and capacitance for via coupling. Are there equations
that take the seperation and lengths of the vias as input? I've tried to
come up with equations myself, but I have not been able to get values close
to Ansoft's. I would appreciate any comments.

Thanks in advance,
Erich Heinemann
IBM Beaverton

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