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cadence使用技巧

MassachusettsInstituteofTechnology

DepartmentofElectricalEngineeringandComputerScience

6.776

HighSpeedCommunicationsCircuits

Spring2005

CadenceandSpectreRFTutorial

ByAlbertJerng

02/13/05

Introduction

ThistutorialwillintroducetheuseofCadenceandSpectreRF

forperformingcircuitsimulationin6.776.Cadencecontainsan

entiredesignframeworkforICdesign,

includingschematiccapture,layout,circuitsimulation,and

verificationtools.WewillberunningCadenceVersion4.4.6on

MITserverSUNmachines.TheSpectrecircuitsimulatorisrunin

theAffirmaAnalogDesignEnvironmentwithintheCadence

designframework.SpectreisanadvancedSPICEsimulatorthat

simulatesanaloganddigitalcircuitsatthedifferentialequation

level.SpectreRFincludesadditionalsimulationcapabilitiessuch

asperiodicsteadystate(PSS),s-parameteranalysis,and

nonlinearnoiseanalysisthatmakesimulatingRFcircuitseasier.

Thistutorialwillfirstexplainhowtogetthe6.776

CadenceenvironmentrunningonMITserver.Then,two

exampleswillbepresentedthatwillhelpyougetfamiliarized

withtheSpectreRFcircuitsimulator.

SettingUpCadence

1.LogintoanMITServerSUNmachine

2.Typethefollowinglines:

add6.776

source/mit/6.776/setup_cadence

Youcanaddtheselinestoyour.cshrc.minefilesothatyou

donothavetorepeat

thisstepeachtime.Youmusttypesource.cshrc.mineforthe

changestotake

place.

3.ForthefirsttimerunningCadence,removeormoveyour

~/cdsdirectory,then

type:

cadence

Cadenceversion4.4.6shouldstart.A~/cdsdirectorywillbe

createdwiththe

filesneededfor6.776.

Atthispoint,youshouldseetwowindowstitledicfband

LibraryManager.Inthe

LibraryM