Yuav ua li cas txheeb xyuas tus menyuam ntsuag NPN?

1, nkag siab cov qauv ntawm NPN
Firstly, los txheeb xyuas NPN cov neeg txuas, peb yuav tsum nkag siab lawv cov qauv txheej txheem. Ntn transistors muaj peb thaj tsam: N-hom emitter cheeb tsam, P-hom thaj chaw, thiab N-hom Collector cheeb tsam. Peb thaj tsam no tau txuas nrog los ntawm ob lub junctions, tsim ib tug qauv qhaub cij. Hauv NPN trantors, tam sim no ntws los ntawm emitter (e), undergoes tsis muaj zog tawm ntawm lub hauv paus (b), thiab tom qab ntawd ntws tawm ntawm tus sau (c). Nkag siab cov qauv qauv no yog thawj kauj ruam hauv kev txheeb xyuas NPN nyuam qhuav.
2, saib lub ntim thiab pins ntawm transistors
Tom ntej no, peb tuaj yeem txheeb xyuas qhov txuas ntxiv ntxiv los ntawm kev saib xyuas nws lub ntim thiab pins. Npn transistors feem ntau ntim nyob rau hauv ntau hom ntawv, txog-92, thiab lwm yam muaj ib qho nyob rau hauv ntau, lawv txhua tus muaj peb pins, puag rau tus, thiab collector.
Emitter (e): Feem ntau cim ua E lossis tus lej me me nrog tus xub me, qhia tias qhov tam sim no ntws mus rau hauv lub tansor los ntawm no.
Lub hauv paus (B): nyob nruab nrab ntawm lub cev hloov kho thiab tus sau, nws yog tus tseem ceeb PIN rau kev tswj hwm tam sim no. Ntawm lub ntim, nws yuav tsis muaj cov cim pom tseeb, tab sis nws tuaj yeem txheeb xyuas los ntawm nws txoj haujlwm lossis kev txheeb ze loj rau lwm cov pins.
Tus sau (c): Tus lej PIN cim li C lossis loj dua, uas yog qhov uas tam sim no ntws tawm.
3, siv tus maltimeter los sim tauv tauv
Txhawm rau ntxiv paub meej seb tus neeg transistor yog ntawm NPN hom, peb tuaj yeem siv tshuaj multimeter rau kev sim. Lub motionatal hluav taws xob ntsuas hluav taws xob ntsuas uas tuaj yeem ntsuas ntau yam tsis xws li voltage, tam sim no, thiab kev tawm tsam. Thaum kuaj sim cov transistors, peb tsuas yog tsom rau pem hauv ntej thiab thim rov qab cov yam ntxwv ntawm lawv cov kev sib tshuam PN.
Teeb lub multimeter multimeter: teeb kev sib txuam rau ntawm Diode Test hom (feem ntau cim tias "HFE" lossis hom nrog cov cim diode).
Kuaj cov emitter thiab puag: Txuas cov kev sojntsuam liab (zoo) rau lub emitter thiab cov kev sojntsuam dub (tsis zoo) rau lub hauv paus. Yog tias qhov sib txuam nrog cov txiaj ntsig tsis tshua muaj nuj nqis (ntau pua ohms), nws qhia tau tias pn kev sib tshuam ntawm lub emitter thiab puag hauv ntej kev coj ua. Tom qab ntawv hloov qhov sojntsuam cov haujlwm thiab ntsuas dua. Yog tias tus nqi tiv thaiv yog qhov siab heev (yuav luag tsis kawg) lub sijhawm no, nws ntxiv cov ntawv tshaj tawm no.
Kuaj lub hauv paus thiab cov sau: zoo sib xws, txuas cov kev sojntsuam liab rau lub hauv paus thiab qhov kev sojntsuam dub rau tus sau, thiab saib tus nqi tiv taus. Vim tias muaj ob lub junctionss (hauv kev rov qab series) ntawm tus sau thiab puag, theoretically ib tug siab tiv taus tus nqi yuav tsum tau ua kom pom. Txawm li cas los xij, thov nco ntsoov tias vim yog cov dab neeg nonlinear ntawm cov transistors, tus nqi tiv thaiv ntawm no tej zaum yuav tsis muaj dab tsi kiag li, tab sis kuj tseem ceeb.
Siv HFE hom los kuaj tam sim no: Ntau ntau ntau kuj muab HFE Test hom kev sim HFE, uas tuaj yeem ntsuas ncaj qha rau cov kev tiv thaiv tam sim no. Ntxig tus transistor rau hauv kev sim mus rau hauv txoj kev no raws li cov chaw ntawm NPN, ua tib zoo mloog tus nqi HFE tso tawm ntawm multimeter. Rau NPN cov transistors, tus nqi no yuav tsum yog tus lej zoo.
4, xa mus rau cov ntaub ntawv ntawm phau ntawv ntawm lub transistor
Yog tias koj muaj cov ntaub ntawv ntawm cov ntaub ntawv rau cov chaw ua haujlwm ntawm tes, cov txheej txheem kev ua cim yuav ua kom yooj yim dua thiab muaj ntau dua. Cov ntaub ntawv ntawm phau ntawv ntawm phau ntawv feem ntau teev cov ntaub ntawv cov ntsiab lus tseem ceeb xws li tus qauv transistor, daim ntawv foos, pin kev muaj hluav taws xob, etc. in nthuav dav. Los ntawm piv cov ntaub ntawv no, koj tuaj yeem lees paub sai sai tias tus transistor yog ntawm NPN hom thiab nws cov tsis muaj tseeb.
5, Kev ceev faj
Ua tib zoo ntawm hluav taws xob zoo li qub: thaum kov cov khoom siv rhiab xws li trantors, nco ntsoov ua tib zoo mloog rau kev tiv thaiv kev tiv thaiv kev tawm tsam kev tiv thaiv kev tawm tsam kev tiv thaiv kev tiv thaiv kev tawm tsam. Cov electrostatic tawm yuav ua rau kev puas tsuaj sab hauv ntawm cov transistors.
Tsis txhob dhau los: thaum ntsuas cov txheej txheem, tsis txhob khaws lub transistor nyob rau hauv lub siab tam sim no lossis siab voltage lub xeev ntev kom tsis txhob muaj kev kub ntxhov thiab kev puas tsuaj.
Txheeb xyuas cov pins: Vim yog cov sib txawv hauv tus neeg tauv khoom uas tsim los ntawm cov chaw tsim khoom sib txawv, nws yog ib qho tseem ceeb kom ua tib zoo tshawb xyuas cov ntaub ntawv ntawm phau ntawv lossis ntawv ntim khoom thaum txheeb xyuas pins.
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