Subject: Re: [IBIS-Users] Simplified model for receiver
From: Perry Qu (Perry.Qu@alcatel.com)
Date: Wed Aug 14 2002 - 14:21:52 PDT
Kevin,
Thanks for your suggestion. I'm using HSPICE 2001.2 and 2001.4. None them
works on this model.
I will check the IV curves as you suggested. In the mean time, I find it hard
to understand that the same model works fine in XTK.
REgards
PErry
Kevin Fisher wrote:
> 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.com
>
> Perry 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
> >
> >
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-- Perry QuProduct Integrity | 600 March Road Alcatel Canada | Ottawa, ON K2K 2E6, Canada
DID: (613) 7846720 | FAX: (613) 5993642
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