Creating a Layout from a Schematic.docx

Creating a Layout from a Schematic.docx

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CreatingaLayoutfromaSchematic

CreatingaLayoutfromaSchematic

ThisexampledemonstrateshowtouseMicrowaveOfficetocreatealayoutfromaschematic.Itincludesthefollowingmainsteps:

∙ImportingaLayerProcessFile（LPF）

∙EditingDatabaseUnitsandDefaultGridSize

∙Importingacelllibrary

∙Importingandplacingadatafileinaschematic

∙Changinganelementsymbol

∙Placingmicrostriplinesforlayout

∙Assigninganartworkcelltoaschematicelement

∙Viewingalayout

∙Anchoringalayoutcell

∙Creatinganartworkcell

∙ManipulatingtheMTRACE2elementinlayout

∙Snappingfunctionsinlayout

∙Exportingalayout

CreatingaNewProject

Theexampleyoucreateinthischapterisavailableinitscompleteformaslayout_example.empinyourC:

\ProgramFiles\AWR\AWR2010\Examplesdirectory.ToaccessthisfilefromalistofGettingStartedexampleprojects,chooseFile>OpenExample,Ctrl-clicktheKeywordscolumnheaderandtype"getting_started"inthetextboxatthebottomofthedialogbox.Youcanusethisexamplefileasareference.

Tocreateaproject:

1.ChooseFile>NewProject.

2.ChooseFile>SaveProjectAs.TheSaveAsdialogboxdisplays.

3.Navigatetothedirectoryinwhichyouwanttosavetheproject,type"layout_example"astheprojectname,andthenclickSave.

ImportingaLayerProcessFile

ALayerProcessFile（LPF）definesthedefaultsettingsfortheLayoutView,includingdrawinglayers,layermappings,3Dviews,andEMsightmappings.

ToimportanLPF:

1.ClicktheLayouttabatthelowerleftofthewindowtodisplaytheLayoutManager.

2.Right-clickLayerSetupintheLayoutManager,andchooseImportProcessDefinition.TheImportProcessDefinitiondialogboxdisplays.

3.Locatetheprogramdirectory（C:

\ProgramFiles\AWR\AWR2010isthedefaultinstallationdirectory）anddouble-clickittoopenit.Ifyouchangedthedefaultinstallationdirectory,thenlocatethatdirectoryinsteadwhentheprogramdirectoryisreferenced.

4.SelecttheMIC_english.lpffileandclickOpen.ClickYeswhenpromptedtoreplacethedefaultlpffile.ThefollowingfigureshowstheLayoutManager.

EditingDatabaseUnitsandDefaultGridSize

Adatabaseunitisdefinedasthesmallestunitofprecisionforalayout.Itisveryimportantthatthisparameterisnotchangedafteritisset.Changingdatabaseunitscancauseroundingerrorsthatmayleadtoproblemsinthelayoutfile.ThegridsizeisimportantbecausemanyICdesignsmustresideonagrid.Thegridmustbegreaterthanorequaltothedatabaseunit.Becausethegridmultiplier'ssmallestunitis.1x,youshouldsetthegridto10timesthedatabaseunittopreventhavingasmallergridthandatabaseunit.

Tosetthedatabaseunitandgridsize:

1.ChooseOptions>LayoutOptions.TheLayoutOptionsdialogboxdisplays.

2.OntheLayouttab,type".1"inGridspacingand".01"inDatabaseunitsize.

3.InSnaptogether,selectAutosnaponparameterchangesandthenclickOK.

ImportingaGDSIICellLibrary

CelllibrariesareusedinMicrowaveOfficetoprovideboththephysicalpackagesandfootprintsforprintedcircuitboardorhybriddesignprocesses,aswellasthestandardartworkcellsusedinMMICandRFICdesignprocesses.MicrowaveOfficesupportstheGDSIIfileformatasthenativedrawingtoolformat.

ToimportaGDSIIcelllibrary:

1.Right-clickCellLibrariesintheLayoutManagerandchooseImportGDSIILibrary.

2.NavigatetotheC:

/ProgramFiles/AWR/.../Examples/directoryintheAWRprogramdirectoryanddouble-clickittoopenit.

3.Selectthepackages.gdsfileandclickOpen.TheimportedcelllibrarydisplaysintheLayoutManager.Ifawarningmessagedisplays,clickOK.

ImportingaDataFile

Toimportadatafile:

1.IntheProjectBrowser,right-clickDataFilesandchooseImportDataFile.TheBrowseforFiledialogboxdisplays.

2.NavigatetotheC:

/ProgramFiles/AWR/.../Examples/directoryintheAWRprogramdirectoryanddouble-clickittoopenit.

3.SelecttheN76038a.s2pfileandthenclickOpen.

PlacingaDataFileinaSchematicandAddingaGroundNode

Toplaceadatafileinaschematicandaddagroundnode:

1.Right-clickCircuitSchematicsinProjectBrowser,chooseNewSchematic,andcreateaschematicnamed"qslayout",thenclickOK.

2.ClicktheSUBbuttononthetoolbartoaddasubcircuit.TheAddSubcircuitElementdialogboxdisplaysasshowninthefollowingfigure.

3.SelectN76038afromthelistandselectExplicitgroundnodeastheGroundingtype.

4.ClickOKtoplaceitintheschematicwindow.

ChangingtheElementSymbol

YoucanchangethesubcircuitsymboltorepresentaFETsothatyoucanseewhichnodescorrespondtothegate,drain,andsource.

Tochangetheelementsymbol:

1.Double-clickthesubcircuitelementintheschematicwindow.TheElementOptionsdialogb