Trans+ac analysis in Cadence

[Chinmaye]

Dear all,
I am running a cross function after transient analysis to find a certain instant instant of time. I would like to use this time (as calculated by cross func) in trans + ac analysis. How can this be done?

 

[Dominik Przyborowski]

What you need?
1. Transfer result from one test and use it in another test?
2. In one test, find your event and run ac?

If 1 is valid then use calcVal function.
If 2 is valid, use spectre check to get event and call ac (proper document how to perform event triggered simulation is on CDNS support site, I am unsure if you can find it in installation doc directory)

 

[Chinmaye]

What you need?
1. Transfer result from one test and use it in another test?
2. In one test, find your event and run ac?

If 1 is valid then use calcVal function.
If 2 is valid, use spectre check to get event and call ac (proper document how to perform event triggered simulation is on CDNS support site, I am unsure if you can find it in installation doc directory)

I need to run one simulation where I find the time at which i want to run AC. In the same simulation, I want to run AC as well.

 

[Dominik Przyborowski]

So 2nd point.
1. Create an assertion in ADE for the net you want: choose expression and define proper cross function (details you can find in SpectreMDL Reference manual → spectre_installation_dir/doc/mdlref/).
2. In transient analysis options: as actimes provide (@(assertion_name)) and in acnames your ac analysis (so, either ac, stb, noise)

As a result, you should get info in spectre output.log that event assertion_name has been found at time XX and after it tran-ac ac analysis is performing