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1、PCB布局设计规则和技巧PCBlayoutdesignrulesandtechniquesThesettingtechniqueofgridpointsinPCBlayoutdesignThedesignrequireseachpointsetdifferentatdifferentstagesinthePCBstagecanbeusedforthelayoutofthelayoutofthedevice:forIC,connectorsandotherpositioningdevices,thelayoutoflatticeprecisioncanbeused50^100mil
2、,andfortheresistaneecapacitanceandinduetanceofpassivesmalldevices,canbeused25milgridlayout・Theaccuracyofthedeviceforalignmentandlayoutofthebeautiful・PCBlayoutrules:1,ingeneral,allofthecomponentsshallbearrangedonthesamesideofthecircuitboard,onlythetop-levelelementistoodense,canbehighlylimiteda
3、ndsmallheatdevices,suchaschipresistor,SMDcapacitors,SMDIConlowlayer・2,underthepremiseofensuringtheelectricalpropertiesofthecomponents,shouldbeplacedonthegridandparallelorverticalarrangement,inordertotidyandbeautiful,ingeneraldoesnotallowoverlappingelements;elementsarearrangedtobecompact,compo
4、nentsshouldbeevenlydistributedinthewholelayout,uniformdensity・3,Theminimumdistaneebetweenthepadsofdifferentcomponentsonthecircuitboardshallbeabove1MM・4,fromtheedgeofthecircuitboardisgenerallynotlessthan2VM.,thebestshapeofthecircuitboardisrectangular,theratiooflengthtowidthis3:2or4:3.,thecircu
5、itboardsurfaceislargerthan200MM・When150MMistaken,themechanicalstrengthofthecircuitboardshouldbeconsidered・PCBlayouttechniques:InPCBlayoutdesign,toanalyzethecircuitboardunit,accordingtothefunctionoflayoutdesign,allcomponentsofthecircuitlayout,shouldcomplywiththefollowingprinciples:1,Arrangethe
6、locationofeachfunctionalcircuitunitaccordingtothecircuitflow,sothatthelayoutfacilitatestheflowofsignalsandkeepsthesignalinthesamedirectionaspossible・2,eachfunctionalunitofthecorecomponentsasthecenter,aroundhimtolayout・Componentsshouldbeevenly,integrallyandcompactlyarrangedonthePCBtominimizean
7、dshortentheleadandconnectionbetweenthecomponents・3,inhighfrequencyoperationofthecircuit,weshouldconsiderthedistributionparametersbetweencomponents・Ingeneral,thecircuitshouldbearrangedinparallelasmuchaspossible,sothatitisnotonlybeautiful,butal
