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Simulators >> Circuit Simulators >> how to re-run tran with last simulation results?
https://designers-guide.org/forum/YaBB.pl?num=1217396043

Message started by jlee on Jul 29^th, 2008, 10:34pm

Title: how to re-run tran with last simulation results?
Post by jlee on Jul 29^th, 2008, 10:34pm

Dear guys,

Does anyboby knows how to re-run tran with last simulation results that include all nodes operating point?

I remember some guy also asked the same question in the forum, but I can't find out the web.

Thanks

Jason :D

Title: Re: how to re-run tran with last simulation results?
Post by bernd on Jul 30^th, 2008, 2:15am

You have to create 'saved state' or 'checkpoint' file and restart your simulation
with the 'recover' option.

Virtuoso Spectre Circuit Simulator User Guide
Running a Simulation
Recovering from Transient Analysis Terminations

In the transient options

'write' writes the 'saved state' file from the initial point.
'writefinal' writes the 'saved state' file from the final point.
usually this files are called 'spectre.ic' and 'spectre.fc'
'recover' specifies the 'checkpoint' or 'saved state' file to read.

> spectre -help | grep -A1 recover +recover[=filename] Restarts the simulation from a checkpoint or savestate file,.
You have to try it. I have not done this for a long time.

Have also a look at
http://www.designers-guide.org/Forum/YaBB.pl?num=1186585475/2#2

*

Title: Re: how to re-run tran with last simulation results?
Post by dongzz201 on Jul 31^st, 2008, 8:56pm

if HSPICE is used, then how to re-run the trasnient ?

Title: Re: how to re-run tran with last simulation results?
Post by ywguo on Aug 5^th, 2008, 10:38pm

Hi Bernd,

After an interruption because of tranient non-convergence, I re-run the simulation as what you instructed. However, the waveform before the interruption is overwritten. In fact I wanna combine the waveform before and after the interruption into one so that a DFT/fourier analysis is done. Otherwise a lot of data is lost and the remaining data is not enough to run DFT.

Any comments are appreciated.

Yawei