HI~!
I think the key for what "rca" said is that:
-> you must load the different sdf which generated under 1.0 volt instead 1.8 volt
As we have known, the timing in gate-level simulation is annotated by .sdf
That means no matter how you change the operating condition in simulation, the timing is fixed if the .sdf is the same.
Therefore, the question will be converted to:
-> How do we change voltage for operating condition during PrimeTime ?
But in fact, I never do this before, I can't give you answer about this.
If there is anyone who is willing to share how to do, I'll appreciate this.
Thanks.
Best Regards,
PoLo