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First time with corner analysis

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Kicchan

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Hi everyone,

I am facing with corner analysis for the first time and I have no idea how to do it. I have read all the previous posts about it on edaboard but my ideas are getting even more confused... :-( Is it necessary to write down a code to performe a PVT analysis??
I am working with Virtuoso (Cadence ver.6.1) and my technology is UMC 90nm.
Can anyone help me in arranging a PVT analysis?
Thank you in advance.
 

some example:
corAddProcess( "cormer_Temp" "/work/newmodel" "multipleModelLib" )
corAddModelFileAndSectionChoices( "cormer_Temp" "xxx.scs" '("sbfr" "fbsr" "fs" "sf" "ff" "ss" "tt") )

corAddCorner( "cormer_Temp" "tt_f40" )
corSetCornerGroupVariant( "cormer_Temp" "tt_f40" "xxx.scs" "tt" )
corSetCornerRunTempVal( "cormer_Temp" "tt_f40" -40 )
 
No, it is not necessary to write code to run corner simulations. You can just change the voltage. temperature and process using the standard methods (e.g. design variables for voltage, simulation settings for temperature and models for process) but soon you will realize that having a script that does this for you is very handy. When you have a script, you can start it and do something else while you wait for the results instead of baby sitting the simulator.
 
Thanks to both JoannesPaulus and leo_o2 (even though I have no idea what's the meaning of what you have written down :shock: ).
I have understood how to perform corner analysis with respect to voltage and temperature variations but what about models for process? How to change them?
Thank you again for your precious help.
 

For UMC90, in the ADE window: Setup->Model Libraries
A new window will pop up with a list of different models. You can select the predefined corners using the enable/disable buttons.
 
Thank you, JoannesPaulus. I just found them. :grin:
 

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