Hi Mirka, Another good source for theoretical calculations, basics, and access to preloaded MATHCAD formula's is HIGH-SPEED DIGITAL DESIGN (A HANDBOOK OF BLACK MAGIC) Authors: Howard W. Johnson & Martin Graham Prentice Hall ISBN 0-13-395724-1 (I got mine from Amazon.com) Also, I agree with other sources, Lee Ritchey & Rick Hartley do excellent presentations - course materials great. Clear your schedule, make time, it's well worth it. JOE SENDZ....... -----Original Message----- From: Mirka Halas [SMTP:[log in to unmask]] Sent: Wednesday, February 25, 1998 12:36 PM To: [log in to unmask] Subject: [TN] Design over 1GHz << File: ATT00002.txt; charset = x-UNICODE-2-0-UTF-7 >>