If you want calculators for impedance of traces on PC boards, check out
http://www.ultracad.com.

Otherwise, what is it that you want?

Carl Van Wormer
Cipher Systems
1815 NW 169th Place, Suite 5010
Beaverton, OR  97006
Phone (503)-617-7447    Fax (503)-617-6550

-----Original Message-----
From: Mauro, Dan [mailto:[log in to unmask]]
Sent: Friday, March 15, 2002 5:28 AM
To: [log in to unmask]
Subject: [TN] Impedance calculator

Does any one know a good tool to model impedance calculations.