[SI-LIST] Re: Blog: Gaps in return planes
- From: "Lee " <leeritchey@xxxxxxxxxxxxx>
- To: <ken@xxxxxxxxxxxxxxxx>, <EMC-PSTC@xxxxxxxxxxxxxxxxx>, "SI-List" <si-list@xxxxxxxxxxxxx>
- Date: Mon, 21 Apr 2014 08:51:51 -0700
Ken,
As Eric Bogatin often says "depends". If the gap is there because there are
two or more power rails in the same plane and the PDS design has been done
correctly, there is no problem. Do it all the time. Most of the designs I
am involved with would not be possible without this strategy. For example,
29 Vdd rails in a 22 layer PCB.
-----Original Message-----
From: Ken Wyatt
Sent: Saturday, April 19, 2014 12:58 PM
To: EMC-PSTC@xxxxxxxxxxxxxxxxx ; SI-List
Subject: [SI-LIST] Blog: Gaps in return planes
Hi All,
I just posted the following - “Gaps in return planes - yes or no?”
I present arguments from an EMC and SI viewpoint where I feel they can be
bad news, but I’d be interested in cases or scenarios where gaps in return
planes are OK or maybe even preferred.
http://www.edn.com/electronics-blogs/the-emc-blog/4429950/Gaps-in-return-planes---yes-or-no-
Your insightful thoughts are solicited…
Cheers, Ken
_______________________
Ken Wyatt
Wyatt Technical Services LLC
ken@xxxxxxxxxxxxxxxx
www.emc-seminars.com
Phone: (719) 310-5418
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