how to improve accuracy

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jolia

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spectre accuracy option

hello everyone,
I want to improve the accuracy of simulation in spectre(cadence),but I don't know how to realize it ,please help me ! thank you :|
 

abstol vabstol relation

jolia said:
hello everyone,
I want to improve the accuracy of simulation in spectre(cadence),but I don't know how to realize it ,please help me ! thank you :|
Click to expand...
hi,
i remember that in analog design environment window, you can find the simulation menu, click it and you will find options --> analog,click it, and you can change the simulation accuracy by reltol and vabstol like in hspice.
may it help.
jeff.yan
 

how to improve accuracy of documentation

but more accurate more simulate time.
 

vabstol

but how to change the reltol,vabstol,these two parameter abey some law ?
 

reltol vabstol edaboard

simpliest answer is - let say you run transient sim. Then you can choose between conservative, moderate and one more which I forget how they name it.
So if you choose between them and then in analog options look at reltol abstol how it is changed and from there you will see how to change those if you want to increase/decrease accuracy.
 

reltol abstol howto

if you want to use the more accurate as default, you can define them in cdsinit file
 

where can I find cdsinit file? I have found it in cadence documentation,but can't find

Added after 1 minutes:

to improve accuracy,can gmin help?:|thanks!
 

jolia said:
where can I find cdsinit file? I have found it in cadence documentation,but can't find

Added after 1 minutes:

to improve accuracy,can gmin help?:|thanks!
Click to expand...

use "ls -a" , the file name is .cdsinit
 

You also can improve the accuray by setting the simulation step.
 

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