Mos characteristics of MOS tutoralADS设计内容教程.ppt

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1、AnalyzecharacteristicsWhyweneedknowcharacteristicsoftransistors.File->NewProjectType“MOS_IV_Curve”inNamelikeFig.1.Click‘OK’Button.Thentherewillbeanewschematicnamed“untitiled1(Schematic):1”andSchematicWizard:1Click“Cancel”ButtoninSchematicWizard:1SimulateIVCurveInADSFig.1NewP

2、rojectFig.2CancelSchematicWizardClick“Insert”optioninmainmenu.Andthenclick“Template…”SimulateIVCurveInADSFig.3Insert->TemplateFig.4select“FET_curve_tracer”andClick“OK”buttonSimulateIVCurveInADSThenaddthetemplateintoschematicwindow.Fig.5addthetemplateintoschematicwindowClickD

3、esignGuide->Mixers->DeviceCharacterization->MOSFETBSIM3Model(0.25um)Click“OK”buttonSimulateIVCurveInADSFig.6DesignGuide->MixersFig.7addMOSFETBSIM3Model(0.25um)Theaddedmodelnameis“MODnmos25”and“MODpmos25”SimulateIVCurveInADSFig.8addmodelintoschematicwindowNowclickDevices-MOSS

4、imulateIVCurveInADSFig.9addFETMOSintoschematicwindowSelectmosNmostransistor,thenadditintowindowandconnectittocircuit.SimulateIVCurveInADSFig.10theintegralcircuitPressESC,doubleclicktheMOSFET.WemustsetModel=MODnmos25,Length=0.25umandWidth=1um.SimulateIVCurveInADSFig.11setMOSF

5、ETparametersClick“OK”button.Doubleclick“PARAMETERSWEEP”inschematicwindow.AndsetStart=0,Stop=5,Step-size=1,sincewejustneedsixcurves.SimulateIVCurveInADSFig.12setparametersweepDoubleclick“DC”,Anddirectlyclick“OK”button.SimulateIVCurveInADSFig.13setdcsweepClick“simulate”icontos

6、imulateIVcurve.SimulateIVCurveInADSFig.14simulationresultWejustneedchangesomesettingconditionintheaboveprojecttoobtaindcoperatingpoint.SimulatedcOpInADSFig.15theschematicoftheaboveprojectSelect“PARAMETERSWEEP”,thenclick“deactivateoractivatecomponent”button.SimulatedcOpInADSF

7、ig.16DeactivatePARAMETERSWEEPDoubleclick“DC”,delete“Parametertosweep”,thenclick“OK”buttonSimulatedcOpInADSFig.17DeletetheDCsweepChangetheinitialvalueofVDSandVGS.Click“simulate”torundcsimulation.SimulatedcOpInADSFig.18AltertheinitialvalueofVDSandVGSSimulate->AnnotateDCSolutio

8、nSimulatedcOpInADSFig.19Simulate->AnnotateDCSolutionThepinkwordsarethedcsol