Subject: RE: [IBIS-Users] Eldo runs, and R,L,C package effect.
From: Hazem Hegazy (hazem.hegazy@qualim.com)
Date: Thu Dec 11 2003 - 13:48:26 PST
Hi Lior,
I made a lot of IBIS models using Eldo in the past. Also I used its IO
element a lot and compare the result with the real buffer circuit; it
always gives very good results.
I can't judge from what you are saying, can you send me the cir file of
Eldo WITHOUT the sub circuits and all the confidential stuff?
BR,
Hazem Hegazy
General Manager
Quality Modeling services, QualiM.
www.qualim.com
Tel:+20106052154
Fax: +2024043350
-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Lior Dagan
Sent: Thursday, December 11, 2003 8:01 PM
To: Ibis-Users (E-mail)
Subject: [IBIS-Users] Eldo runs, and R,L,C package effect.
Hello wise people.
I am running Eldo as a simulator for extracting ibis data. I use it to
verify the results as well (running eldo on the circuit modeled AND on
ibis model, and comparing them)
I have encountered some difficulties.
1. How does ibis determine the vinh/vinl for an output buffer? How does
it decide to change states?
2. I get a large mismatch in delay, could this be the result of even
spaced V/T samples?
3. I tried to change R_pkg (pins have NA on all of them) from 3m to 3E6,
and it showed no effect on my eldo. Can anyone tell me why?
4. @ r_fixture=70 ohms I get a large jitter, @ r_fixture=1000, I get a
much smaller jitter, how does it happen?
Thanks,
Lior Dagan.
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