RE: Question regarding the [POWER_clamp] curve

Mike,

The algorithm s2ibis would need to do is described in my IBIS
Modeling class presentation on pages 78-81. You can find
this presentation IBIS_class_JEDEC.pdf on the IBIS web site:

http://www.eda.org/pub/ibis/training/

inside the IBIS_class_JEDEC.zip file. I hope this helps.

Arpad
=============================================================

-----Original Message-----
From: Bob Ross [mailto:bob_ross@mentorg.com]
Sent: Wednesday, July 11, 2001 5:09 PM
To: Mike LaBonte
Cc: Bob Ross; Prasad Rau; ibis-users@eda.org
Subject: Re: Question regarding the [POWER_clamp] curve

Mike:

The proper way is to improve the s2ibis2 utility or
the surrounding processes as you attempted to do.

I was able to download and read the nasef.zip file.
I can send you privately a copy if you have trouble.

More responses are in your response.

Bob
Mentor Graphics

> Mike LaBonte wrote:
>
> Bob,
>
> I found out that Prasad's issue is indeed how to get s2ibis2
> to produce an IBIS file where drivers with internal termination.
> My proposed workaround is run s2ibis2 twice, once with model type
> Terminator, and steal the clamp curves to use in the other IBIS
> file. But I tried it and found that s2ibis2 seems to double count
> the resistance, because it appears in both the POWER_clamp and
> GND_clamp curves.

This may be a flaw in the s2ibis2 algorithms. Also, s2ibis2
never was designed to handle internal terminators.

> Does it seem reasonable to steal only one of
> the curves from the Terminator run to include in the IBIS file?

No. The proper method is to figure out a way to partition
the currents to the proper rails.

>
> Mike
>
> P.S. I find that the Nasef presentation contains unresolved
> references to image files.
>
> Bob Ross wrote:
> >

 
Received on Thu Jul 12 10:32:21 2001