Activation Technique for Sleep-Transistor Circuits for Reduced Power Supply Noise.pdf

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1、ActivationTechniqueforSleep-TransistorCircuitsforReducedPowerSupplyNoiseStephanHenzlerMatthiasEireinerGeorgGeorgakos,JoergBertholdDorisSchmitt-LandsiedelInfineonTechnologiesAGInstituteforTechnicalElectronicsMunich,GermanyTechnicalUniversityMunich,GermanyVVDDDDAbstract—Powergatingisaneffectivel

2、eakagereductiontech-IIDDDDniquewithgoodscalingproperties.ThecapabilityforasinglecycleactivationoflargecircuitblocksresultsasaconsequenceofCsizingthesleeptransistorforsmalldelaydegradation.However,intinasystemonchipenvironmentthisfastactivationcauseslargecurrentspikesanddegradesthesupplyvoltag

3、eofsurroundingvirtualrailvirtualrailcircuitblocksduetoIR-dropandinductivevoltagedroop.Toavoidtimingerrorsintheseblocks,achargepumpbasedactiva-selfooterselfootertiontechniqueisproposedanddemonstratedexperimentally.ItisinsensitivetoprocessvariationsandcanreducetheactivationVSSVSScurrenttoarbitr

4、arilysmallvaluesattheexpenseofanincreasedactivationtime.ThecapabilityfordigitaltuningallowsforFig.1.Equivalentcircuitfortheestimationoftheactivationtime.adaptionofmaximumactivationcurrentandlatencytothesystemrequirements.Amonitorcircuittracksthevirtualrailpotentialandindicatestheendoftheblock

5、activation.reducethesupplyvoltageofthesurroundingactivecircuitrytosuchanextentthattimingerrorsoccur.Toavoidthis,I.INTRODUCTIONaslower,controllableblockactivationisrequiredforlargesubmodules.TheblockactivationstrategymustguaranteethatIndeepsub-micronCMOStechnologies,leakagecurrentsthetransient

6、currentduringtheblockactivationissmallercontributesignificantlytotheoverallpowerconsumptionofthanthemaximumcurrentinactivemodeunderallprocessdigitalCMOScircuits.Inhighperformanceapplications[1]andoperationconditions.Inthispaperarobust,technol-thislimitsthemaximumnumberofoperationspertimeandogy

7、independentandconfigurableblockactivationstrategyissothecomputingpower.Mobileapplicationsmainlysufferproposed.InsectionIIthecapabilityforsinglecycleblockfromreducedstandbytimeiftheleakagelossesbecomeactivationisdiscussed.SectionIIIrecapitulate