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What is the difference between lumped and coupled parasitic extraction???

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Nantha

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Hi all,

Please anyone explain me about the difference between lumped and coupled parasitic Extraction?

Rgds,
Nantha
 

Lumped - Capacitance distributed will not consider the effect of xtalk
Coupled - Will consider the effect of xtalk

It wont be sufficient if we analyze the timing using Coupled SPEF in PrimeTime . We have to change the read_parasitics command (add -keep_capacitive_coupling) and when doing report_timing , we need to tell -crosstalk to get the effects of the coupled capacitances.
 
Hi srideepa,

Thanks for reply...

Rgds,
Nantha
 

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