FreeLists / si-list / [SI-LIST] Re: Co-Relation between Mentor Graphics ICX SI measurements & Actual SI Measurements

["Giancarlo Guida" <gguida@xxxxxxxxxx>]

Hi
in my opinion
the accuracy of an SI simulation strongly depends
on 2 factors:
1) quality of I/O buffer models
2) extraction of the model for the Pcb signals

For the second factor you should consider that
if the exctraction you are using  is  based  only on 2D alghorithm then
it could be not such accurate at least in some cases

As you said due to the complexity of the board
and the increase speed often a 3D approach is a must ...

I performed simulation based on mixed 3D/2D approach
and the comparison between measurement and simulation
is really good

Simulation is not going to substitue measurement
but if used during design can allow to obtain high quality product
saving time and effort.

Giancarlo

----- Original Message -----
From: "Shiraz Bashir" <shiraz_bashir@xxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Thursday, April 01, 2004 7:22 AM
Subject: [SI-LIST] Co-Relation between Mentor Graphics ICX SI measurements &
Actual SI Measurements


All,

Would me body please tell me that is there any
co-relation between Mentor Graphic's ICX SI
measurements and actual SI measurements ?

Can we rely solely on IBIS models provided by
manufacturers to 'acuratley' predict SI measurements ?
Or one has to 'improve' the IBIS models ?

With today's time to market pressures, complexity of
circuit boards, does one can rely on Mentor Graphic's
ICX tool to predict SI problems so that one can reduce
the actual SI measurements on board ?

thanks in advance for your time and help.

shiraz bashir


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