Iyini i-hFE ku-multimeter
I-hFE iyunithi yokulinganisa yokunquma inzuzo yamanje (noma inzuzo) enganikezwa yi-transistor. Ngamanye amazwi, i-hFE isilinganiso phakathi kokufakwayo kwamanje kanye nomphumela wamanje, futhi ingasetshenziswa ukunquma ukuthi i-transistor ethile ifaneleka kangakanani kusekethe noma uhlelo lokusebenza.
I-hFE ku-multimeter iyisici esilinganisa ukwanda noma ukuncipha kwe-voltage phakathi kwamaphoyinti amabili, ngamanye amazwi, "inani le-hFE ku-multimeter libonisa ukuthi ingakanani okwamanje i-transistor engakwazi ukuyiphatha ngaphambi kokuba iqale ukushisa futhi ihluleke." Isibonelo: lapho okokufaka kwamanje kuyivolthi eyodwa endaweni A kanye ne-amp eyodwa yokufaka yamanje endaweni engu-B, i-voltage ephumayo izoba yi-amp eyodwa izikhathi zevolthi eyodwa ku-hFE. Uma i-hFE ingu-10, okukhiphayo kuzoba ama-amps ayishumi.
hFE incazelo
Ukuze sihlukanise le zibalo, singabona ukuthi i-Ic "imanje yomqoqi" futhi i-Ib "isisekelo samanje". Uma la magama amabili ehlukaniswa ndawonye, sithola inzuzo yamanje ye-transistor, evame ukubizwa ngokuthi i-hFE.
Usho ukuthini u-hfe?
I-hFE imele "Hybrid Direct Emitter". Kwaziwa nangokuthi "i-beta eya phambili" kwezinye izimo. Leli gama livela eqinisweni lokuthi isilinganiso esimelelayo siyinhlanganisela yezilinganiso ezimbili ezihlukene: ikakhulukazi ukumelana kwamanje okuyisisekelo kanye nokumelana kwamanje kwe-emitter. Ziphindaphindwe ndawonye ukuze zenze lokho esikwazi ngokuthi i-hFE.
Kwenziwani ukuhlolwa kwe-hFE?
Ukuhlolwa kukala inzuzo (noma inzuzo) ye-transistor. Inzuzo ichazwa njengesilinganiso sesiginali yokuphumayo kusiginali yokufaka. Kuvame ukubizwa ngokuthi "i-beta" (β). I-transistor isebenza njenge-amplifier, ikhulisa i-current noma i-voltage ekuphumeni kwayo ngokuhlobene nokokufaka kwayo, kuyilapho igcina i-impedance eqhubekayo yokuphuma. Ukuze unqume ukuthi i-transistor izokwenza kahle yini esicelweni, inzuzo yayo kufanele ihlolwe futhi iqhathaniswe naleyo edingekayo kuleso sicelo. (1)
Ibalwa kanjani i-hFE?
I-hFE ibalwa ngokuqhathanisa isisekelo samanje kanye nomqoqi wamanje. Lawa mazansi amabili aqhathaniswa kusetshenziswa i-transistor tester ekuvumela ukuthi uhlole i-transistor okukhulunywa ngayo. Umhloli we-transistor ubamba isisekelo samanje kuleveli engashintshi bese ukala umthamo wamanje womqoqi ogeleza kuwo. Uma usunazo zombili lezi zilinganiso, ungakwazi ukubala i-hFE.
Kodwa-ke, kunezixwayiso ezimbalwa ezibalulekile kule ndlela yokuhlola ama-transistors akho. Isibonelo, kufanele uqaphele ukuthi uma ukala iqembu lama-transistors ndawonye, lizophazamisa ukufunda komunye nomunye. Lokhu kusho ukuthi uma ufuna ukukala ngokunembile amanani e-hFE ama-transistors akho, kungcono ukuwahlola ngesikhathi esisodwa. Nakuba lokhu kungase kubambezele inqubo yokuhlola, futhi kuqinisekisa ukunemba kwemiphumela.
Izincomo
(1) Inguqulo ye-Beta - https://economictimes.indiatimes.com/definition/beta
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