Re: [IBIS-Users] Query on Pullup/Pulldown

Hi all,
Its mentioned that the pullup current we see in the model is the difference
of the 2 currents one generated in dut1.spi and other generated in
put1.spi.But when i open the corresponding .out files the difference doesnt
seem to be the same as against the pullup data.

Also i have problem regarding the warninfg that flags of due to the
Monotonicity in the V/I curves.

thanks&regards
arnab hazarika

----- Original Message -----
From: "Ambrish Varma" <akvarma@ncsu.edu>
To: "'Vivek Kumar Sundriyal'" <Vivek.Kumar.Sundriyal@nsc.com>;
<ibis-users@eda.org>
Sent: Friday, January 14, 2005 8:49 AM
Subject: RE: [IBIS-Users] Query on Pullup/Pulldown

> Hello Vivek,
> put1.spi is the setup file for the entire driver whereas dut1.spi is the
> file with the driver disabled (to get the clamp current).
>
> The pullup current you see in the model is the difference of the 2
currents
> to give the performance of only the driver.
>
> We then take only a few points from the linear part of the curve and a
> majority of points from the 'interesting' part of the curve.
>
> That's a 100 feet view of how things are done in s2ibis2.
>
> Hope that helps,
> Ambrish.
>
>
> Ambrish K Varma
> akvarma@ncsu.edu
> North Carolina State University
> ph(919)513-2015, fax(919)515-2285
>
> -----Original Message-----
> From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf
> Of Vivek Kumar Sundriyal
> Sent: Friday, January 14, 2005 7:12 AM
> To: ibis-users@eda.org; owner-ibis-users@eda.org
> Subject: [IBIS-Users] Query on Pullup/Pulldown
>
> Hi ,
>
> Working on s2ibis2, i find put1.spi and dut1.spi for the generation
of
> the
> pullup data.
>
> Can anyone explain why do we need two sets of files for the pull up
> data ?
>
> How does s2ibis2 extrapolate/interpolate these values into the final
> .ibs
> file ?
>
> Thanks,
>
> Vivek
>
>
>
>
>
>
>
>
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Received on Wed Feb 9 23:41:04 2005