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hspice monte carlo
Is there any one giving me a hand about the hspice simulation of the monte carlo sweep times?
question : how are the monte carlo sweep times determined?
if sigma is 3, must monte carlo sweep times be 1000?
if sigma is 5, must monte carlo sweep times be ten million? if...
But if the IR drop is caculated based on the peak current. It will be very large IR drop. And if the IR drop is caculated based on the average current,the IR drop is accepetable.
So how to decide the power width?
the vddio has the big current. So the electromigration and IR drop is needed to considerated. So how to decide to the vddio power line width? So it depends on the average current or peak current?
Re: phase margin of voltage regulator in the nonvolatile me
Thanks for all of you replies!
And I have a new questions:
If the precise voltage is be need , the LDO architecture would be used. Is it important for this applications.
Normally, the phase margin is larger than 45 degree. But I heart that the PM of the voltage regulator in the nonvolatile memory can less than 45 degree from my leader. I don't know it's true.
If you are the nonvolatile memory designer ,Can you give me the answer ?