RE: [SI-LIST] : Impedance calculator

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From: Jack Olson (JackOlson@NVISION1.com)
Date: Tue Nov 09 1999 - 16:45:24 PST


Here is one article that might help:

The Effect of Vias on PCB Traces - by Doug Brooks
http://www.ultracad.com/t009.pdf <http://www.ultracad.com/t009.pdf>

Jack

                -----Original Message-----
                From: ctyang@adlink.com.tw [mailto:ctyang@adlink.com.tw]
                Sent: Tuesday, November 09, 1999 3:50 PM
                To: si-list@silab.eng.sun.com
                Subject: [SI-LIST] : Impedance calculator

                Dear All,

                Most of the impedance calculation softwares only calculate
the
                impedance of straight line without through hole or via. But
in
                a backplane, there are lots of through holes along with the
lines.
                Obviously, these through holes will reduce the impedance of
the line.

                Does any one know any tool or method which can calculate the
                impedance of a line with vias?

                Thanks,
                CT Yang
                ADLink Technology, Inc.
                

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