RE: [SI-LIST] : or3t125a.ibs

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From: George Borkowicz (jbor@nortelnetworks.com)
Date: Mon May 08 2000 - 07:41:25 PDT


Inmyung,

On top of the advice below I would strongly recommend that you review
this model with your vendor. The non-monotonicity in the gnd clamp is
caused by the numerical noise at the low current levels and it is harmless.
However, the power clamp has been obviously tweaked for unknown reason
with chunk of it now commented out.

It is very bad when things like that show up in such a simple input model,
even if your simulation may not be greatly affected.
Makes you think what else is wrong,

George Borkowicz
Nortel Networks

> -----Original Message-----
> From: Chien, Ruey Wen [SMTP:ruey.wen.chien@intel.com]
> Sent: Sunday, May 07, 2000 11:30 PM
> To: si-list@silab.eng.sun.com
> Subject: RE: [SI-LIST] : or3t125a.ibs
>
> Inmyung:
>
> Your problem is the non-monotonicity of VI curve. IS checks 3 non-
> montonicities, sum of clamp curves, sum of clamps and pull-up, sum of
> clamps and pull-down.
>
> You may turn off the model checker for non-monotonicity checking.
>
> The attachment includes two scheme file for off and on the modelchecker.
>
> Ruey-Wen Chien
> Intel
>
> -----Original Message-----
> From: Song In-myung [mailto:imsong@itx03.internex.co.kr]
> Sent: Sunday, May 07, 2000 8:49 PM
> To: PCB Design Mail Group
> Subject: [SI-LIST] : or3t125a.ibs
>
>
> Hello everyone.
>
> I am from south korea and the pcb designer.
> Now I am training IS made by mentorgraphics.
> During importing this IBIS model into IS, there are 3 parser errors but I
> can't fix these.
>
> Please help me.
> Other IBIS model checker pass this IBIS model and made non-error except
> IS.
>
> Thank you for your great help.
>
>
> Inmyung Song.
> << File: offckecker.scm >> << File: onckecker.scm >>

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