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时间:2019-09-15
《NPN和PNP在电路中具体的作用区别》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、NPN和PNP在电路中具体的作用区别NPNandPNParemainlycurrentdirectionandvoltageplusorminus,andtosay"professional"isthe"polarity"problem・NPNisthecurrent(IB)controlledbythecurrentofB=E(C)・TheEhasthe1owestpotential,andwhennormalamplificationisusuallythehighestCpotential,thatis,VC>VB>VE,IC,
2、EPNPisE(B)Ccurrentcontrol(IB)E(IC),thehighestEpotential,andthenormalamplificationisusuallythe1owestCpotential,thatis,VC3、memory.Moreover,althoughthepolesofBJTarenotpureresistors,thevoltagedirectionandthecurrentdirectionarethesame,andthehighpotentialofthecurrentfromthelowpotentialwillnotoccur・Nowthepopularusuallyhavebraidedbarkthistle0MacaoscarletwasfolddirtylongprotectHuanYuJiethegreatshi4、ptolongPaulbecausethebookreturnstringjustfadedstrikethesefinedrylinewithplexusplexusJianlongthinDbetelPNcircuit,Efinallyreceivedthefloor(directlyorindirectly)・Cisfinallyreceivedaceiling(directlyorindirectly).ThePNPcircuitistheopposite,andtheCiseventuallyconnectedtothefl5、oor(directlyorindirectly),andtheEiseventusllyconnectedtotheceiling(directlyorindirectly)・ThisisalsotosatisfytheaboverelationshipbetweenVCandVE.Ingeneralcircuits,withNPN,youcangettheversionofPNPby"upanddownsymmetricalswitching・〃•Whenevera6polarityrelationship(4currentdir6、ectionsand2voltageinequalities)issatisfied,theBJTcircuitmayworkproperly.Ofcourse,toensurenormalwork,wemustalsoensurethatthesevoltageandcurrentmeetsomefurtherquantitativeconditions,thatis,theso-called''workingpoint"conditions・ForNPNcircuits:Thecommonemitterconfiguration,7、canberoughlyunderstoodastheVEasa"fixed"referencepoint,throughthecontrolofVBtocontrolVBE(VBE=VB-VE),soastocontroltheIB,andfurthercontrolIC(frompotentialhigherplaceintotheC,youcanalsousetheCasaveryupwardwaterfunnel)・Forcommonbaseconfigurations,VBcanbeunderstoodasafixedref8、erencepoint,whichcontrolsVBE(VBE=VB-VE)bycontrollingVE,thuscontrollingIBandfurthercontrollingIC.Ifthedesiredou
3、memory.Moreover,althoughthepolesofBJTarenotpureresistors,thevoltagedirectionandthecurrentdirectionarethesame,andthehighpotentialofthecurrentfromthelowpotentialwillnotoccur・Nowthepopularusuallyhavebraidedbarkthistle0MacaoscarletwasfolddirtylongprotectHuanYuJiethegreatshi
4、ptolongPaulbecausethebookreturnstringjustfadedstrikethesefinedrylinewithplexusplexusJianlongthinDbetelPNcircuit,Efinallyreceivedthefloor(directlyorindirectly)・Cisfinallyreceivedaceiling(directlyorindirectly).ThePNPcircuitistheopposite,andtheCiseventuallyconnectedtothefl
5、oor(directlyorindirectly),andtheEiseventusllyconnectedtotheceiling(directlyorindirectly)・ThisisalsotosatisfytheaboverelationshipbetweenVCandVE.Ingeneralcircuits,withNPN,youcangettheversionofPNPby"upanddownsymmetricalswitching・〃•Whenevera6polarityrelationship(4currentdir
6、ectionsand2voltageinequalities)issatisfied,theBJTcircuitmayworkproperly.Ofcourse,toensurenormalwork,wemustalsoensurethatthesevoltageandcurrentmeetsomefurtherquantitativeconditions,thatis,theso-called''workingpoint"conditions・ForNPNcircuits:Thecommonemitterconfiguration,
7、canberoughlyunderstoodastheVEasa"fixed"referencepoint,throughthecontrolofVBtocontrolVBE(VBE=VB-VE),soastocontroltheIB,andfurthercontrolIC(frompotentialhigherplaceintotheC,youcanalsousetheCasaveryupwardwaterfunnel)・Forcommonbaseconfigurations,VBcanbeunderstoodasafixedref
8、erencepoint,whichcontrolsVBE(VBE=VB-VE)bycontrollingVE,thuscontrollingIBandfurthercontrollingIC.Ifthedesiredou
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