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I am a student and just started my masters project work.Its about power integrity.I have some doubts regarding the A.C analysis. I am confused about the term Frequency of interest and how to calculate it for a particular I.C.
What is the expression to calculate the frequency of interest in terms of impedance.My professor asked me to calculate the impedance limit for a I.C pin at a frequency of interest. Nothing is mentioned in the data sheet about frequency of interest.I know how to calculate the target impedance of a power rail but do not know which will be the frequency at which, I have to maintain the value of I.C pin impedance below the target impedance.
Some I.C manufacturers give frequency of interest values as well as the impedance value but some dont.
I have read one document from cadence in which they mentioned the formula for target impedance.But on page 7 what is F ? Is it frequency of interest or something else?
Please follow the below link from Cadence Allegro for the reference:-
Please help me.I will be thankful to you.
Looking forward to hear from your end soon.