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Simulators >> RF Simulators >> save spectre PSS result for PAC simulation
https://designers-guide.org/forum/YaBB.pl?num=1165408606

Message started by cilao on Dec 6^th, 2006, 4:36am

Title: save spectre PSS result for PAC simulation
Post by cilao on Dec 6^th, 2006, 4:36am

When runing PAC simulation in spectre, is it nessary to run also PSS?
is it possible to save the PSS result and using this result for PAC simulation?
Thx, cilao

Title: Re: save spectre PSS result for PAC simulation
Post by ACWWong on Dec 6^th, 2006, 6:13am

Hi cilao,

1) yes, PAC simulation requires a PSS solution as an initial operating point.
For help try:
spectre -h pac

2) yes, its is possible to save the PSS result and use it (load it) for use with pac simualtion without the need to recompute it. For details try
spectre -h pss
And use "writepss" and "readpss".

cheers
aw

Title: Re: save spectre PSS result for PAC simulation
Post by cilao on Dec 11^th, 2006, 6:09am

Thank a lot. I have try this option but it seem running much slow than before.
do i still need to set any option.

Louis

Title: Re: save spectre PSS result for PAC simulation
Post by ACWWong on Dec 11^th, 2006, 7:25am

The first run will be the same as a normal run length time as you have to write the pss file. (Perhaps you have someone else of you machine using compute resource ?!?)
Subsequent runs should be much quicker if you put the writepss file name into the readpss field in the pss options form. This is because the pss part of the simulation will now only do quick re-check that the read pss solution meets the convergence requirements (rather than recompute tstab and pss soltuion from scratch) before moving onto to the pac run.