NI Multisim：高级的捕捉与设计.docx

N1.Mu1.Usini:州级的捕捉与设计NIMuItisim,高级的捕捉与设计OverviewTransformingadesignfromscribb1.esonanapkintoanorganizedandprofessiona1.schematicisavita1.stepinanye1.ectronicsdesignprocess,andtheneedforaProdUCUVeyetpowerfu1.capturetoo1.iscritica1.Asanycircuitdesignercanattestto,timeisava1.uab1.ecommodity,andisbetterspentonimportantdesignworkratherthan1.earningtheidiosyncrasiesofadifficu1.t-to-mastercaptureprogram.Nationa1.InstruaentsIfai1.tisio(Figure1)isaprofessiona1.SchermiticcaptureandcircuiIsimu1.ationpackagethathasfocusedonprovidingpowerfu1.designfeaturesthatintegrateseam1.ess1.yintotheapp1.icationdesignf1.ow.Thisintuitiveenvironmenthe1.psanyengineertoeasi1.y,successfu1.1.yandquick1.ycomp1.etetheirdesigns.Inprojectsofanycomp1.exity,Mu1.tisim'sadvancedcaptureprovidesbenefitsbyofferingintuitivetoo1.sata1.1.1.eve1.sofSChenIa1.iCcapture:fromthefundamenta1.sofp1.acementandwiring,totheadvancedfeaturesofprojectmanagementandcommunication.IntuitiveandEfficientCaptureMu1.tisiincombinesanintuitivesimu1.ationenvironmentWi1.hadvancedcapturefeaturestoenhancedeve1.opment,reducerepetitivetasks,andbecomeanassettoanycircuitdesigner.Thetruebenefitsofthesefeaturesareeasi1.yrea1.izedinMu1.tisim1becausetheyareimp1.ementedwithinaneasy-to-useenvironmentwithintuitiveinterfaces.InthemajorityofEDtoo1.staskssuchascomponentse1.ection,p1.acement,andwiringaretime-intensiveand1.aborious.Mu1.tisimhasbeendeve1.opedtobreakawayfromthisarduousmo1.d.Everyschematicbeginswiththese1.ectionandp1.acementofcomponents,andasaresu1.tanengineer,Sinitia1.taskistosearchtheircapturetoo1.,sdatabaseforspecificcomponents.ManytradiIiona1.EDtoo1.sare1.umberedwithdisorganizeddatabasesthataredifficu1.ttonavigate.Inthesetoo1.s,componentse1.ectionisahurd1.einthedesignprocess.InMu1.tisim,a1.117.OOOcomponentsinthemasterdatabaseare1.ogica1.Iyorganizedintoeasy-tonavigategroups(Figure2).Theseroutingsref1.ectthetypeofdeviceandfunctiona1.ity,sothatcomponentssuchasdiodesareinonegroup,whi1.eop-ampspopu1.ateaseparateana1.oggroup.This1.ogica1.organizationmirrorsthewaymostmanufacturerspresenttheirownparts1ibrarios,providinganintuitiveinterfacethatanengineerhasencounteredwny1.imesbefore.Figure 2. Mu1.tisiBdatabaseorganizationWithCOmpOnenISse1.ectedfromthedatabase,Iheengineerisfacedwiththesecondfundamenta1.taskincapture:ponents.Inherent1.ythedesignprocessisquiteinvo1.vedasanengineercontinuous1.ynavigatestothedatabase,searchesforandpicksapari,andthenwiresitintoIhedesign.Inunytraditiona1.EDAtoo1.s,anengineerwi1.1.quick1.yrea1.izeIha1.wiringrequiresthemtorepeated1.yswitchbetweenp1.acementandwiringmodesforeachnewcomponentandwiretobep1.aced.Overthecourseofanentiredesign,thisconstantswitchingcanborderuponPainfU1.oranengineer.InMu11isiin,thistediumise1.iminatedbyamode1.essenvironment,wherethemousecursor*Sproximitytopinsandotherconnectorswi11automatica1.1.ya1.1.owthedrawingofwires(Figure3).TheabiIitytoquick1.ycreateconnectionswithoutconstant1.yswitchingbetweendrawingmodesmakesthecaptureprocessmuchmoreefficient.Figure 3. Effort1.esswiringintheMu1.tisiamode1.essenvironentWithpartsp1.acedandconnectionscreated,evenasimp1.edesignbeginstoevo1.veintoaSChemaIiCofsizeandcomp1.exity.Devicesandwiresspanasheet,makingthesearchforspecifice1.ementssomewhatdifficu1.t.ThisisanissuesincethenatureofIhedeve1.opmentprocessistobeinastateofconstantchange,withe1.ementsbeingmovedandeditedwhiIeadesignisimproved.Theabi1.itytoeasiIymanageandaccessthesee1.ementsacrossavastschematicisextraordinari1.yimportant.Eoradesignfanyscope,theMu1.1.isimspreadsheetview(Figure4)sandcomponentsthatcanbesortedbyreferencedesignator,schematicsheetandotherproperties.Theengineerbenefitsfromanorganized,sing1.einterfaceinwhichtoviewandeditthepropertiesofthe1.isteddesigne1.ements.Thisspreadsheetviewathersthefunctiona1.itythatcannorma1.1.yon1.ybeaccessedbyse1.ectingthepartitse1.fontheschematic.Thisoffersimmediateandcomprehensiveaccesstoa1.Ie1.ementsofacircuit.Fromthisspreadsheetview,afootprintcanbechanged,apartrep1.acedandanetrenamed,e1.ininati11thetryingtaskofsearchingacrossmu1.tip1.epagesandnumerousb1.ockstoaccomp1.ishtheSameresu1.t.Figure 4. Rep1.acingapartfroatheSpreadsheetViewProject-BasedDesignAstheschematicevo1.vesinsizeandcomp1.exity,thedesigncannatura1.1.ybecomec1.uttered,unreadab1.eanddifficu1.ttounderstand.DesignsOfsca1.ecanbebetterInanagedandorganizedwithamodu1.arapproachbysp1.ittingthecircuit*sfunctiona1.ityintob1.ocksthatexistacrosssevera1.schematicfi1.es(Figure5).Theprojectmanagementtoo1.sinMu1.tisimprovideaneffectivemannerinwhichtohand1.eandkeeptrackofvariousfundiono1.modu1.esand1.heirrespectiveinterconnectionswithinthegreaterdesign.Noton1.ydoesthisefficient1.yorganizeadesign,butita1.soresu1.tsinre-usab1.ehierarchica1.b1.ocksthatcanbesharedamongmu1.tip1.eprojectsandteamsofengineers.Figure 5. Modu1.ardesignwithHierarchica1.B1.ocksinHu1.tisinWhenusinghierarchica1.b1.ocksformodu1.ardesign,thenextrequirementofthecapturetoo1.istoce