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Path: utzoo!linus!philabs!cmcl2!seismo!brl-tgr!tgr!MCCLUSKEY@JPL-VLSI.ARPA
From: MCCLUSKEY@JPL-VLSI.ARPA (John McCluskey)
Newsgroups: net.micro
Subject: How to fab One-Of-A-Kind Systems
Message-ID: <10903@brl-tgr.ARPA>
Date: Tue, 21-May-85 21:54:44 EDT
Article-I.D.: brl-tgr.10903
Posted: Tue May 21 21:54:44 1985
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With my own two little hands I wirewrapped a Garry ECL wire-wrap board that
ran just fine at 45.5 Mhz after a little tweaking.  The tweaking consisted of
putting in flip flops to catch signals that wouldn't propagate through three
chips in less than 22 nanoseconds.  In any case, Augat sez that you can hit
100 Mhz with ECL wirewrap, and I think I'll check that out this summer.
  I was amazed the first time I looked at rise and fall times on ECL with
a scope.  The edges are NOTICEABLY less sharp after TWO inches of wire.
I guess that God just doesn't like higher harmonics in 50 Mhz square waves.

John McCluskey @JPL-VLSI.ARPA
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