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1、PathSelectionandPatternGenerationforDynamicTimingAnalysisConsideringPowerSupplyNoiseEffectsJing-JiaLiou,AngelaKrsti´c,Yi-MinJiang*andKwang-TingChengElectricalandComputerEngineeringDepartment,UniversityofCalifornia,SantaBarbara*SynopsysInc.,MountainView,CA94043Abstractco
2、rporatestatisticaltimingdeviationscausedbythesesourcesseemstobeNoiseeffectssuchaspowersupplyandcrosstalkcansignificantlyaf-inevitable.Ourpathselectiontechniqueconsideringpowersupplynoisefecttheperformanceofdeepsubmicrondesigns.Thesedelayeffectsareisbasedonastatisticaltim
3、inganalysisframework[4].Instatisticaltim-inganalysis,thedelaysofcells/interconnectsaremodeledascorrelatedhighlyinputpatterndependent.Existingpathselectionandtiminganaly-randomvariableswithknownprobabilitydensityfunctions(pdfs).Givensistechniquescannotcapturetheeffectsof
4、noiseoncell/interconnectde-thesecell/interconnectdelays,thecelllevelnetlistandtheclockperiod,lays.Therefore,theselectedcriticalpathsmaynotbethelongestpathsstatisticaltiminganalysiscanderivethepdfsofthesignalarrivaltimes,andpredictedcircuitperformancemightnotreflectthewor
5、st-casecircuitrequiredtimesandslacksatinternalsignalsandprimaryoutputs.Noisedelay.Inthispaper,weproposeapathselectiontechniquethatcancon-effects,suchaspowersupplynoise,cancauseperturbationsofthedelaysiderpowersupplynoiseeffectsonthepropagationdelays.Next,fortherandomvar
6、iablesoftheaffectedcellsand/orinterconnects.Weusetheselectedcriticalpaths,weproposeapatterngenerationtechniquefordy-statisticalmodelforpowersupplynoiseproposedin[1]toderivetheper-namictiminganalysissuchthatthepatternsproducetheworst-casepowerturbeddelayrandomvariablesof
7、eachcell/interconnectinthepresenceofsupplynoiseeffectsonthedelaysofthesepaths.Ourexperimentalresultspowersupplynoise.Byrunningthestatisticaltiminganalysisusingtheperturbedcell/interconnectdelayswederivetheslackdistributionsatin-demonstratethedifferenceinestimatedcircuit
8、performanceforthecaseternalnodesandprimaryoutputsofthecircuit.Theseslackdistributionswhenpowersupplynoiseeffec
