[SI-LIST] Re: About via model!

Dear Jack,

The assumptions behind my rather crude via capacitance approximation
are discussed in the following article, along with some better
data.

"Via Capacitance" newsletter v.5, #09  archived at www.sigcon.com

Best regards,
Dr. Howard Johnson, Signal Consulting Inc.,
tel +1 509-997-0505,  howiej@xxxxxxxxxx
http:\\sigcon.com  -- High-Speed Digital Design articles, books, tools, and
seminars



-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Jack W.C. Lin
Sent: Friday, October 25, 2002 3:36 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] About via model!


Hi All SI Friends:
I would like to build up a simple via model, my XFX3D (innoveda) only can
calculate CAP_only. Is there any free software to calculate a signal via? (
I know there is a simplified formula in Dr. Johnson's High Speed Digital
Design, but I think there is an unclear constraints or conditions for real
via situation). Any recommanded is highly appreciated! Thanks!
Jack


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