One can run DC simulation at a particular instant of transient analysis.
However, is it possible for the same for AC analysis ?
In other words, I actulally want as follows:-
I want to run transient for 10 us after which the circuit enters into certain state.
At this point I want to start AC analyis
Is it possible and how it can be achieved ?
Could anybody please tell.
You need to use the acnames and actimes parameters on the transient options form. acnames is a list of the names of the analyses you wish to run (so "ac" in this case), and actimes is a list of the times during the transient that you wish to run them at.
Thanks a lot.
So the complete ac analysis expression (.ac Command) will be written in the "acnames" or it will be written in the ac analysis ?
That is :- Whether I have to enable ac analysis in the ac analysis form and give the frequency range and then go to acname type "ac"
Is it the way ?
I'm sure this must be in the documentation somewhere or even on this forum or on support.cadence.com and a search for "acnames" would probably have found it (I didn't try, but I'd be surprised if it's not somewhere)
Anyway, fill out the ac analysis form as usual, and then that definition will be used during the transient (ADE netlists the instance of the ac analysis as being called ac too), and it's the instance name of the analysis you are referring to in the acnames parameter.
See also "spectre -h tran"
BTW, spectre doesn't normally use ".ac" since that is the archaic SPICE syntax rather than spectre's own more regular syntax.