[SI-LIST] Re: ddr2 ansoft / EMC2 paper available for download
- From: pritchard_jason@xxxxxxx
- To: <si-list@xxxxxxxxxxxxx>
- Date: Mon, 5 Nov 2007 09:18:34 -0500
Hi Chris,
Did you really mean page 21? The test board consisted of only ground
planes. Since this was a test board the power planes of the original
stack-up were made into ground planes.=20
The stackup looks like this.=20
S
G
G
S
G
S
G
G
S
G
S
G
G
S=20
=20
-Jason
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Chris Cheng
Sent: Saturday, November 03, 2007 5:51 PM
To: weirsi@xxxxxxxxxx; si-list
Subject: [SI-LIST] Re: ddr2 ansoft / EMC2 paper available for download
Steve and Jason,
Thanks for sharing.
Let me clarify a question I have from the beginning.
In page 21 of the presentation, it shows the signal transition consist
of a microstrip line switching from one reference plane on one side
(ground) to the opposite side (power). Is this really how the simulation
and measurement is done ?
i.e. the image return current is denied a direct return path between the
top reference plane (ground) and bottom (power) ?
Chris=20
________________________________
From: si-list-bounce@xxxxxxxxxxxxx on behalf of steve weir
Sent: Sat 11/3/2007 12:40 PM
To: si-list
Subject: [SI-LIST] Re: ddr2 ansoft / EMC2 paper available for download
To all that asked to see Jason Pritchard of EMC2 and Ansoft's joint
paper on via stitching and EMI it is available via anonymous ( quasi )
on the ipblox FTP server:
ftp.ipblox.com
username: anonymous@xxxxxxxxxx
password: anonymous
It is located in the ftp://ftp.ipblox.com/Ansoft_first_pass_2007/
directory.
regards,
Steve
--
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