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Started by MURRAY,JEFFREY P
Fri, 22 Jan 1993 18:35
XSPICE Simulation Tool Announcement
Author: MURRAY,JEFFREY P
Date: Fri, 22 Jan 1993 18:35
Date: Fri, 22 Jan 1993 18:35
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XSPICE Press Release
January 22, 1993
Georgia Tech Research Corporation
XSPICE, introduced at the 1992 International Symposium on Circuits and
Systems (ISCAS), is an extended and enhanced version of the popular
SPICE analog circuit simulation program originally developed at the
University of California at Berkeley. XSPICE was developed at the
Georgia Tech Research Institute (GTRI) as a tool for simulating
circuits and systems at multiple levels of abstraction. XSPICE permits
a user to simulate analog, digital, and even non-electronic designs
from the circuit level through the system level in a single simulator.
A special Code Modeling feature allows users to add new models
directly into the simulator executable for maximum simulation speed
and accuracy. Code models are written in the C programming language
allowing arbitrarily complex behavior to be described. Code model
development tools are provided to simplify the process of creating new
models, compiling them, and linking them with the XSPICE core.
XSPICE provides a rich set of predefined code models in addition to
the standard discrete device models available in SPICE. The XSPICE
code model library contains over 40 new functional blocks including
summers, multipliers, integrators, magnetics models, limiters,
S-domain transfer functions, digital gates, digital storage elements,
and a generalized digital state-machine.
Digital functions are simulated in XSPICE through an embedded
event-driven algorithm added to the SPICE core. This algorithm is
coordinated with the analog simulation algorithm to provide fast and
accurate simulation of mixed-signal circuits and systems. The
event-driven algorithm supports a new "User-Defined Node" capability
allowing additional event-driven data types to be defined and used.
XSPICE comes with a 12-state digital data type as well as a
user-defined node library that includes 'real' and 'integer' types
useful in simulating sampled-data systems such as Digital Signal
Processing algorithms.
XSPICE is currently available for UNIX workstations and is supplied in
source code form allowing users to customize and extend the simulator
and models to particular needs. To date, the simulator has been
successfully compiled and used on HP Apollo and Sun workstations. The
XSPICE simulator and User's Manual are available with a cost-free
license arrangement from the Georgia Tech Research Corporation for a
distribution charge of US $200 (including first class postage within
the U.S.A.; an additional US $25 is required for overseas delivery by
air). For further information, please contact the Office of Technology
Licensing, Georgia Tech Research Corporation, Georgia Institute of
Technology, 400 Tenth Street, Atlanta, GA 30332-0415, USA, or phone
(404) 894-6287 (voice) or (404) 894-9728 (FAX). Internet users may
send email to XSPICE@GTRI.GATECH.EDU to obtain copies of the order
form and license agreement (please include the word "license" in the
subject header when mailing to this address).
--
MURRAY,JEFFREY P
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp: ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!jm67
Internet: jm67@prism.gatech.edu
Re: XSPICE Simulation Tool Announcement
Author: MURRAY,JEFFREY P
Date: Wed, 27 Jan 1993 14:01
Date: Wed, 27 Jan 1993 14:01
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I have gotten a lot of email reqesting more information about
XSPICE; particularly, most folks seem to want to get more info on
the tools prior to reqesting a copy. This is a reasonable request,
unfortunately, we do not currently have the resources to do much
toward that end, at least not in real time. I may try to get more
information in the form of a spec sheet or attempt to move portions
of the User's Manual onto the xspice@gtri.gatech.edu host machine
to allow for anonymous FTP of that information. In the mean time,
I am trying to answer as many of the questions I receive as possible...
please bear with me.
For those of you who just can't wait (and I hope there are at least
a few of you ;-), let me suggest that you get hold of your nearest
technical library, and obtain a copy of the Proceedings of the 1992
International Symposium on Circuits and Systems. One of the papers
presented (authors are F.Cox, W.Kuhn, S.Tynor and myself) introduces
XSPICE and details an example of syntax, lists the models included,
and works through an example using XSPICE to simulate the analog and
digital portions (all in one netlist) of a MIDI-controlled music
synthesizer. The paper should provide enough information to cover the
most basic questions that have come up, but I will continue to see
about getting all or portions of the User's Guide up and running.
Again, bear with me. XSPICE is not a commercial product, just as
"plain vanilla" SPICE is not...we don't have the resources of a
MicroSim (=PSPICE) to promote the tools or help new users, although we
would certainly like to. The "cost" of XSPICE is really just for
documentation, cutting tapes, etc. and doesn't provide any real margin
for support...we want folks to use these tools because we know ourselves
how powerful they are. We are convinced that XSPICE provides most of the
capabilities of a PSPICE and in many ways goes beyond it; it's up to the
user community to decide if we're right.
Regards,
Jeff Murray
--
MURRAY,JEFFREY P
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp: ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!jm67
Internet: jm67@prism.gatech.edu
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