Subject: Re: ibis
From: Adam.Tambone@fairchildsemi.com
Date: Tue Sep 18 2001 - 12:38:19 PDT
John,
My apologies for the delay in this response.
I am still not clear as to what you have or what you want to create.
Perhaps some very general and simplified advice can get you started.
First inspect the material available at the IBIS site mentioned by Arpad,
especially the specification itself. IBIS models ( datasheets ) contain DC
and Vt data in addition to other parameters associated with the buffer
being modeled. The DC and Vt data can be gained via simulation ( SPICE to
IBIS ) or through lab measurement. Most of the additional parameters can
be gained from the device's datasheet such as Vinh and Vinl. Collectively
this data comprises a IBIS datasheet which can be used by various
simulators to perform limited SI simulation and analysis. These simulators
read a IBIS datasheet and create their own behavioral model based on the
information contained therein. Creating your own behavioral model from a
IBIS datasheet is not a trivial task.
Hope this helps,
Adam Tambone
john austin <john_austinus@yahoo.com>@eda.org on 09/18/2001 11:58:23 AM
Sent by: owner-ibis-users@eda.org
To: Adam Tambone/SouthPortland/Fairchild@Fairchild
cc: ibis-users@eda.org
Subject: Re: ibis
I have spec which specify the AC, DC requirement.
The specs contain V/I curves pullup & pulldown. Also,
the references curves of the pullup and pulldown.
I am looking to write an approximate behavioral model
for it. So I want to know what equations or portions
of the specs I need to pay attention to, to create V/I
tables, rising & falling waveforms.
I have some idea on how to proceed( based on other
IBIS models) but still I wanted to see a methodology
or guidelines already used by an expert.
Thanks
--- Adam.Tambone@fairchildsemi.com wrote:
>
> John, could you be more specific?
>
> Adam
>
>
>
>
>
>
> john austin <john_austinus@yahoo.com>@eda.org on
> 09/17/2001 07:11:34 PM
>
> Sent by: owner-ibis-users@eda.org
>
>
> To: ibis-users@eda.org
> cc:
>
> Subject: ibis
>
>
> If I want to create a behavioral model out of a
> spec.
> Could you please let me know what I should watch
> for?
> Also, if there is any documents or paper out there
> that facilitate the task?
>
> Thanks
>
> __________________________________________________
> Terrorist Attacks on U.S. - How can you help?
> Donate cash, emergency relief information
>
http://dailynews.yahoo.com/fc/US/Emergency_Information/
>
>
>
__________________________________________________
Terrorist Attacks on U.S. - How can you help?
Donate cash, emergency relief information
http://dailynews.yahoo.com/fc/US/Emergency_Information/
This archive was generated by hypermail 2b28 : Tue Sep 18 2001 - 13:14:21 PDT