I am not sure about what
means peak and average IR drop mode analysis in Encounter. What of
these two analysis modes should be considered for power plan
I have a small block
design (5K gates) operating at very low frequency (640 KHz) and there
is a big difference between the results of these two analysis modes:
worst IR drop average
analysis: 9.8035e-05 v
worst IR drop peak
analysis: 4.3088e-01 v
Is average analysis
frequency dependent? But voltage drop is not event dependent and so
can cause timing problems also at low frequencies?
Thanks in advance.
Hi Clsantos,Coming back to the discussion earlier, power and IR drop are not the same. In your case, the average power is very low because of very long period. However, very low average power means very low "average IR drop", but it does not imply anyting on peak IR.I think it is like this. Your design has to pass average IR drop by a margin or else your dynamic IR drop will fail. Average IR drop is still useful as it is fast to run, and is the only information you have when you do power planning.Regards,Eng Han