Re: [SI-LIST] : SPICE Buffer Models

Elizabeth Perigault ([email protected])
Tue, 31 Mar 1998 17:48:06 -0800

oh well! thanks.
Ray Anderson wrote:
> > Hello:
> > I have a strange request. This comes from getting vendors who have
> > difficulty in or are unable in providing schematics of their sometimes
> > very complex buffer models.
> > Does anyone know if there is a tool out there that can generate a
> > schematic (transistors, transmission lines etc) from a SPICE file?
> >
> > thanks,
> > Lisa
> >
> The HP MDS (microwave design system) has an option that will
> allow you to read in a spice deck and it will produce a
> schematic representation.
> Be aware that while the schematic will be correct from a
> a connectivity (netlist) standpoint, it will be, shall we say,
> aesthetically a mess. The parts are slapped down on the screen
> in some arbritrary order and then they are connected with a
> ratsnest generated from the netlist info from the spice deck.
> In order to make the schematic into something that you can look
> at and easily understand you need to spend a bit of time moving
> the parts around to a more conventional topology. Fortunately the
> wires rubberband so you don't lose the proper connectivity when
> you rearrange things.
> The MDS package is pretty pricey, especially if you don't have
> other uses for it other than doing the spice to schematic generation.
> (Fortunately, we do use it for lots of other things).
> There may be other software that may accomplish the same thing,
> but when I looked around for such a package a few years ago, the only
> other thing that I found at the time that was even close in functionality
> was somebodies thesis project that really didn't work all that well.
> Ray Anderson
> Sun Microsystems Inc.


Elizabeth Perigault MTS/Component Engineer

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