Subject: RE: [IBIS-Users] Power clamp.
From: Tom Dagostino (tom@teraspeed.com)
Date: Sun Sep 21 2003 - 11:12:33 PDT
Lior
It is hard to say if your results are valid without having an understanding
of the buffer in question. These results could be reasonable but are not
common for most of the buffers I've worked with.
Your PowerClamp table should look like this assuming you are filling in the
typical parameters only in the model:
-2.70 5E-3 NA NA
-1.35 1.5E-6 NA NA
0.00 0.00 NA NA
1.35 0.00 NA NA
2.70 0.00 NA NA
Tom Dagostino
Teraspeed Consulting Group LLC Teraspeed Consulting Group LLC
2926 SE Yamhill St. Device Modeling Division
Portland, OR 97214 13610 SW Harness Lane
Beaverton, OR 97008
http://www.teraspeed.com 503-430-1065
tom@teraspeed.com
-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On Behalf Of
Lior Dagan
Sent: Sunday, September 21, 2003 2:52 AM
To: Ibis-Users
Subject: [IBIS-Users] Power clamp.
Hello, I have a question:
I wish to conduct power clamp simulation, and for making it simple, I'll do
a very small simulation:
VCC=2.7V
I have five sweep points:
0V, 1.35V, 2.7V, 4.05V 5.4V.
The results (current measures) are: 0 0 0 1.5e-06 5E-3
My question is:
Is the stimulus valid?
should the reults be in their values, or relative to vdd?
i.e. What should the section from the IBIS file look like?
0 0
1.350E+0 0
2.70E+0 0
4.050E+0 1.50E-6
5.40E0+0 5E-03
or:
-2.70E+0 0
-1.350E+0 0
2.70E+0 0
4.050E+0 1.50E-6
5.40E+0 5E-03
Thanks
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