[SI-LIST] 答复: IBIS question
- From: xuzhengrong <Zhengrong.Xu@xxxxxxxxxx>
- To: 'Stephane Tremblay' <strembl1@xxxxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Fri, 18 Apr 2008 09:27:18 +0800
Which simulation deck do you use?
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=B4=FA=B1=ED Stephane Tremblay
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=D6=F7=CC=E2: [SI-LIST] IBIS question
Hi SI-Listers,
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I am using a DDR IO buffer that has not been designed in-house. =
The
macro provider did provided us with an IBIS model for the Termination =
AND
another IBIS Model for the IO itself (since there is active termination =
on
DDR2). Since the two are connected on the same PAD at the die level, I =
did
the same on the simulation deck. By doing so, I got nasty sim results =
and
after investigation I realized that Package info was present on both =
IBIS
models.=20
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As I think I am a smart engineer, I tried to decoupled the package info =
from
the actual two IBIS models that I have, but I don't get the same results =
if
I put the parasitic outside the IBIS vs. inside the IBIS.=20
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Anyone has a clue why?=20
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How do I get Package Parasitic outside the IBIS? Just setting RLC =
discrete
values outside did not reproduce the same sim.
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Here is the Parasitic I need to separate from my Model:
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[Package]
| variable typ min max
R_pkg 0.58 0.48 0.68
L_pkg 5.80nH 4.10nH 7.50nH
C_pkg 0.58pF 0.51pF 0.65pF
|
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Thanks,
Steph.
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