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1、PADS电路板设计流程PADScircuitboarddesignf1owThedesignflowofPCBisdividedintosixsteps:netlistinput,rulesetting,componentlayout,wiring,check,reviewandoutput1netlistinputTherearetwowaysofnetworkinput,oneistousethePowerLogicOLEPADSConnectionSendNetlist,applicationfunction,OLEfunction,cankeeptheprincipledia
2、gramandPCBdiagram,tominimizethepossibilityoferror・AnotherapproachistoloadthenetlistdirectlyinPADS,selectFile->Import,andenterthenetlistgeneratedbytheschematic・2rulesettingsIfyouhavesetthedesignrulesofthePCBintheschematicdesignphase,youdon'thavetosettheserules,becausewhenyouenterthenetlist,thede
3、signruleshavebeenenteredintothePADSwiththenetlist・Ifthedesignrulesaremodified,theschematicdiagrammustbesynchronizedtoensurethattheschematicdiagramisconsistentwiththePCB.Inadditiontothedesignrulesandlayerdefinitions,therearesomerulesthatneedtobeset,suchasPadStacks,whichneedtomodifythesizeofthest
4、andardvias・Ifthedesignetcreatesanewpadorthroughhole,addLayer25.Becareful：PCBdesignrules,layerdefinition,holesetting,CAMoutputsettingshavemadethedefaultbootfilenamefortheDefault・stp,afterthenetlistinputin,inaccordancewiththeactualsituationofthedesign,thepowersupplynetworkanddistributionforpowera
5、ndgroundplanes,andotheradvancedrules・Afteralltherulesaresetup,inPowerLogic,usetheRulesPADSConnectionfunctionoftheOLEFromPCBtoupdatetherulesettingsintheschematicdiagramtoensurethattheschematicandPCBdiagramsareconsistent・1componentlayoutNettableinput,allcomponentswillbeplacedintheworkareaofzeropo
6、ints,overlaptogether,thenextstepistoseparatethesecomponents,inaccordaneewithsomerulesputneatly,thatis,thelayoutofcomponents・PADSprovidestwomethods,manuallayoutandautomaticlayout・1.1manuallayout1.toolprintedboardstructuresize,drawplateedge(BoardOutline)・2.DisperseComponentscomponents,componentsw
7、illbearrangedaroundtheedgeoftheplate・3.movethecomponentsonebyone,andplacetheminsidetheedgeoftheboard,andputtheminordeTaccordingtocertainrules.3.2automaticlayoutPADSprovidesautomaticlayoutandautomaticlocalclusterlayout,butformostde
