[SI-LIST] Re: EMI and Power plane card edge clearance distance
- From: "Knighten, Jim L" <JK100005@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: esayre@xxxxxxxx, daveheald@xxxxxxxxxxxx,Stacy_L_Gore@xxxxxxxxxxxx
- Date: Wed, 1 Aug 2001 12:19:32 -0400
Just a note:
There is a technical paper from the University of Missouri-Rolla on the 20-H
Rule scheduled to be presented at the IEEE EMC Symposium in Montreal on
August 16. I don't know anything about the contents of the paper.
Hwan-Woo Shim, Hao Wang, and Todd Hubing, "20-H Rule Modeling and
Measurements"
Jim
__________________________
Dr. Jim Knighten
Teradata, a Division of NCR
17095 Via Del Campo
San Diego, CA 92127
Tel: 858-485-2537
Fax: 858-485-3788
e-mail: jim.knighten@xxxxxxx
-----Original Message-----
From: Dr. Edward P. Sayre [mailto:esayre@xxxxxxxx]
Sent: Wednesday, August 01, 2001 8:34 AM
To: daveheald@xxxxxxxxxxxx; Stacy_L_Gore@xxxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: EMI and Power plane card edge clearance
distance
Dear SI Colleagues:
Please realize that the so called 20-H rule is a "Rule of Thumb" and that
it is not a real engineering derived design rule except for the specific
problem someone worked out when the rule was first derived. If you want to
use it, then so be it, but recognize that other factors can overwhelm the
benefits, so use it with care.
Sincerely,
ed sayre
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