Subject: Re: [IBIS-Users] Simplified model for receiver
From: Kevin Fisher (kfisher@sisoft.com)
Date: Wed Aug 14 2002 - 13:31:57 PDT
Perry,
What version of Hspice are you running?
In the combined IV curves for the LVDS driver model, where do the
pullup/p-clamp and pulldown/g-clamp cross 0mA, and are there data points
explicitly stating the 0mA crossing in the tables?
Have you ran other simulations with the IBIS driver model in Hspice that
gave you expected results?
I would suggest running an IV sweep on the LVDS IBIS model and comparing
the resulting IV curves with the IV curves in the IBIS model.
-- Kevin M. Fisher Consultant Signal Integrity Software Inc. 6 Clock Tower Place, Suite 250 Maynard, MA 01754 Phone: (978) 461-0449, ext 11 http://www.sisoft.comPerry Qu wrote: > Hi, > > Can anyone share your experience to use a simple die capacitance to > replace IBIS receiver model, especially for differential receivers ? I > run into such situations frequently when some IBIS models does not > behave properly in HSPICE and I have to do the simulation using other > IBIS-based tools. e.g., i had a case right now when the driver is an > IBIS model (LVDS) and receiver is in HSPICE. The apparent choice is to > run the simulation in HSPICE. Unfortunately, the IBIS model does not > behave properly in HSPICE, whereas it works fine in XTK. I was forced to > run the simulation in XTK but I have to replace the HSPICE model of > receiver with a simplified model to at least get some feeling about the > signal integrity. Of course, I will add packaging in the simulation. > > Thanks > > -- > Perry Qu > > Product Integrity | 600 March Road > Alcatel Canada | Ottawa, ON K2K 2E6, Canada > > DID: (613) 7846720 | FAX: (613) 5993642 > > > |------------------------------------------------------------------ > |For help or to subscribe/unsubscribe, email majordomo@eda.org > |with just the appropriate command message(s) in the body: > | > | help > | subscribe ibis <optional e-mail address, if different> > | subscribe ibis-users <optional e-mail address, if different> > | unsubscribe ibis <optional e-mail address, if different> > | unsubscribe ibis-users <optional e-mail address, if different> > | > |or email a written request to ibis-request@eda.org. > | > |IBIS reflector archives exist under: > | > | http://www.eda.org/pub/ibis/email_archive/ Recent > | http://www.eda.org/pub/ibis/users_archive/ Recent > | http://www.eda.org/pub/ibis/email/ E-mail since 1993
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