Re: [SI-LIST] : modeling languages (was: receiver jitter)

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From: C. Kumar (kumarchi@yahoo.com)
Date: Fri Jan 21 2000 - 11:44:58 PST


I meant the type mix is too elaborate. You need a
generic voltage and a current source with the
capability to add delay. For describing them very
generally you will need to implement powerfull
expressions and multidimensional tables and event
trigger mechanism. S parameter and Laplace data types
will be usefull pluses.

The expressions should include logical 'if else' and
derivatives.

With this mix you may be able to completely obselate
mega polynomial data typoes and other special key
words like current controlled current source i.e F and
H elements.

With these sources in my kitty it is possible to build
compact, accurate, elegant and powerful behavior
models.

--- Kim Helliwell <khelliwe@acuson.com> wrote:
> I'm curious about the following statement:
>
>
> "C. Kumar" wrote:
> >
> >
> > 2. Some crucial element types in spice need to be
> > standardized/added.
> >
> > For starters a IBIS behavior block element needs
> to be
> > added/standardized.
> >
> > Coupled lossy transmission line elements
> > added/standardized.
> >
> > A class of controlled current/voltage sources
> needs to
> > be standardized. These sources lie at the heart of
> a
> > circuit simulator and the present selection
> available
> > in most spice simulators is both unncessarily
> varied
> > (like CCVS CCCS etc etc) and yet insuffficient.
> >
>
> Can you elaborate on why you think the controlled
> sources in SPICE are both "unnecessarily varied"
> yet "insufficient?"
>
>
> --
> Kim Helliwell
> Senior CAE Engineer
> Acuson Corporation
> Phone: 650 694 5030 FAX: 650 943 7260
>
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