Static Timing Analysis in the presence of Process Variation

[ebrahimi.khoy]

Is there any method to compute the critical path delay in the presence of process variation? Which tool uses this method and what are the inputs?

Thanks in advance for your answers.

 

[sharath666]

In any run of the tool, you can have only one process. If you want to try with a different process you have to give a different run.
"Primetime" from synopsys is an STA tool you can use for this task. It takes a netlist as an input to do the timing analysis.

 

[ebrahimi.khoy]

I need to have the distribution of critical path delay. With this technique, I can get delay for three corner cases (min, typical, and max).

 

[dmedlock]

You'll need a Liberty model with statistical variation tables and statistical static timing analysis. If you have the correct spice models you can extract the critical path and simulate with monte-carlo analysis for a few paths. Of course, this isn't practical for a large number of paths.

 

[kannanunni]

Is there any method to compute the critical path delay in the presence of process variation? Which tool uses this method and what are the inputs?

Thanks in advance for your answers.

you need to add OCV libraries for that.
cadence ETS can also be used for this purpose.