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1、1.SpectreRFOverview•SpectreRFisanoptionalfeatureaddedtoSpectre,andisrepresentedby6analyses:1.PSS:PeriodicSteadyStateAnalysis2.PAC:PeriodicACAnalysis3.PXF:PeriodicTransferFunctionAnalysis4.PNOISE:PeriodicNoiseAnalysisTdnoise:TimeDomainNoiseQPNOISE:Quasi-PeriodicNoise(notdis
2、cusshere)5.PDISTO:PeriodicDistortionAnalysisQPSS:Quasi-PeriodicSteadyState(notdiscusshere)6.EnvelopeAnalysis(notdiscusshere)PAC,PXF,andPNOISEaresimilarinconcepttoAC,XF,andNoise.However,theyareappliedtoperiodically-drivencircuitssuchasmixersandoscillators.1-1SpectreRFinaDes
3、ignFlowDesignSchematicAnalogArtistEnvironmentModelsThenetlistsincludeallcomponentsalongwithananalysisselection,simulationNetlistcontrolsandstatementstosave,plotnodesorcurrents.SPECTREEngineSpectreRFControlAnalogArtistPlotResultsUseDirectplotortheCalculatorplotcapabilities.
4、1-2SpectreRFToolFlowSpectreRFPDISTOSetupPSSsetupPSSisalarge-signalanalysisanddeterminestheperiodofthesmall-signalanalyses.SpectreEngineSpectreEnginePSSrequiresthatmultiplePDISTOAnalysisPSSAnalysisperiodicstimulibecoperiodic.PDISTOResultsPSSResultsPDISTOisalsoalarge-Spectre
5、Enginesignalanalysis,andneednot-PACAnalysistoberunafteraPSS-PXFAnalysisanalysis.PDISTOdoesnot-PNOISEAnalysisrequiremultipleperiodicstimulitobecoperiodic.ReportResults1-3SpectreRFFeatures•Computeasteady-statesolutionefficientlyanddirectly•Handlesverylargecircuits(~10,000tra
6、nsistors)•Displaysresultsinbothtimeandfrequencydomains•UseDiscreteFourierTransform(DFT)forbetteraccuracy•DisplaysstandardRFmeasurements,suchass-parameterinSmithchart,NF,IP3,and1dBcompressionpointintheAnalogArtistdesignenvironment.•Performsoscillatoranalysis.1-42.S-Paramete
7、rAnalysis•LinearSimulation:–Entirelyinthefrequencydomain–AbasicRFfeatureoftheSpectresimulator•Ports:–Specifytheportnumberonthepsin(orport);psin(orport)canactasasourceportoraload.–Requiredpropertiesforlinearanalysis:Resistance&Portnumber•NoiseAnalysis:–UseNfminandNFfor2-por
8、tcircuitsONLY.1-5PlottingS-ParameterSimulationResultsSP,ZP,YP,HPs-,z-,y-,andh-parametersG
