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jkautsch
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 Posted: Wed Jul 09, 2008 9:32 am Post subject: Spice - reload simulation to simulate further |
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My problem is that I have a very large spice circuit to simulate and I
have to do this on a remote computer which is not very stable. My
simulations takes more then one day, but the remote computer often
crash before my simulation is finished (the crashes don>t have
anything to do with my simulations). My question: Is it possible that
I simulate with spice only "a few" timesteps (so the simulation would
take i.e. 3 hours), so I can save my results then and start a new
simulation which starts at the end of the old simulation?
Until now I only know how to start always from zero on. I don>t know
how to go on with a former simulation. Any suggestions? (I hope it>s
not a too stupid question) |
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qrk
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| Posted: Thu Jul 10, 2008 1:01 am Post subject: Re: Spice - reload simulation to simulate further |
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On Wed, 9 Jul 2008 02:32:36 -0700 (PDT), jkautsch <jkautsch@02n.net>
wrote:
[quote]My problem is that I have a very large spice circuit to simulate and I
have to do this on a remote computer which is not very stable. My
simulations takes more then one day, but the remote computer often
crash before my simulation is finished (the crashes don>t have
anything to do with my simulations). My question: Is it possible that
I simulate with spice only "a few" timesteps (so the simulation would
take i.e. 3 hours), so I can save my results then and start a new
simulation which starts at the end of the old simulation?
Until now I only know how to start always from zero on. I don>t know
how to go on with a former simulation. Any suggestions? (I hope it>s
not a too stupid question)
[/quote]
Can you run the simulation on LTspice? Then you can use a local
computer that is stable. LTspice is free and works as well as the
expensive Spice engines out there.
--
Mark |
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jkautsch
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| Posted: Mon Jul 14, 2008 3:50 pm Post subject: Re: Spice - reload simulation to simulate further |
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Hi!
I can>t fix the computer, because it is a server of a company and I
don>t have admin rights. (And the admins seem to be not able to fix it
by themselves)
And I also have to use this spice, because it is a modified spice plus
additional components to which I don>t have access rights to copy it
(and the company don>t want to give me a copy) - but I need it for my
simulation.
Until now I found out that at least Cadence Spice has a store and
restore functionality:
Look for "continue/trstore" there:
http://www.ece.uci.edu/eceware/cadence/cspiceref/chap4.html#673455
Also SIMetrix (another Spice Simulator) has something called
"Transient restart".
Quote: "Transient analysis can be restarted after the stop time has
been reached. Useful when a circuit takes longer to settle than
originally expected." (http://www.catena.uk.com/site/products/
SIMetrix.htm)
But I didn>t find anything in spice3 (which is as far as I see the
basis of the modified spice of the company)
Regards, Jan |
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Joel Koltner
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| Posted: Tue Jul 15, 2008 2:13 am Post subject: Re: Spice - reload simulation to simulate further |
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"jkautsch" <jkautsch@02n.net> wrote in message
news:9156e9c5-986c-40df-8a78-d910478a9a6d@27g2000hsf.googlegroups.com...
[quote]Also SIMetrix (another Spice Simulator) has something called
"Transient restart".
[/quote]
I don>t think this is quite what you want... AFAIK, their "transient restart"
really just means, "keep simulating for longer... since this whole 'stop time'
bit was 100% artificial anyway..." (For a long time they didn>t even have a
"stop simulation" button on their GUI -- only "pause," because they figured
that there wasn>t a whole lot of point in "stop and go no further" -- which
originally struck me as odd, but these days makes a lot of sense. They added
a "stop" button to make people who felt it odd happy, and then took what they
always had and made it a feature!) |
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