Subject: Re: Some clarifications reg IBIS3.2
From: Bob Ross (bob_ross@mentorg.com)
Date: Mon Oct 01 2001 - 17:50:56 PDT
Hello:
Some brief responses are in your text.
Bob Ross
Mentor Graphics
Mohanasankar Sivaprakasam wrote:
>
> Hello,
> I am Mohanasankar, student at North Carolina State
> University.
> Can some body help me with the following:
>
> 1.What is the difference between Vinl/Vinh in [Model]
> keyword and Vinl/Vinh in [Model Spec] keyword?>
> What different purposes do they serve?
>
The [Model Spec] Vinh/l subparamters allow you to specify min
and max values that may change with [Voltage Range] or some
other reference voltage. PECL technology is an example
where this would be important. Vinh/l subparameter of
[Model] only allows fixed values over the entire range.
The [Model Spec] values always override the [Model]
subparameter specification.
> 2.I got confused with [Add Submodel]..
> Is it a way of reusing models. that is using some
> charcteristics of a model into another??
Some technologies add some functional details to
the buffer. The [Add Submodel] and [Submodel]
keywords provide a way to "add" on some detail
that is of practical interest.
>
> 3.Are there any examples of models conforming to
> IBIS3.2 Specifications which would cover all the
> syntaxes??
There exists some examples that demonostrate some
of the Version 3.2 syntax under
http://www.eda.org/pub/ibis/samples/
for subdirectories ver3.0 and above.
Bob Ross
Mentor Graphics
>
> Thanks for you cooperation.
>
> Mohanasankar.
>
> =====
> "There are new problems to solve.
> Engineers who can solve these problems will define the future"
> Mohanasankar Sivaprakasam,
> Research Assistant,
> Electrical Engineering,
> North Carolina State University,
> Raleigh, NC,USA.
>
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