1.Junction MOSFET fil ganewa
Gate dinMOSFET shi ne tushe na transistor, kuma magudanar ruwa da tushen su ne mai tarawa da emitter nam transistor. Multimeter zuwa R × 1k gear, tare da alƙalami biyu don auna gaba da juriya tsakanin fil biyun. Lokacin juriya na gaba biyu-pin = juriya juriya = KΩ, wato, fil biyu don tushen S da magudanar ruwa D, sauran fil ɗin shine ƙofar G. Idan yana da 4-pinFarashin MOSFET, ɗayan sandar shine amfani da garkuwar ƙasa.
2.Ƙaddara ƙofar
Tare da baƙar alƙalami na multimeter don taɓa MOSFET bazuwar lantarki, jan alkalami don taɓa sauran na'urori biyu. Idan duka juriya da aka auna ba karami bane, yana nuna cewa duka biyun suna da ingantacciyar juriya, bututun na MOSFET na tashar N-channel ne, tuntuɓar alƙalami iri ɗaya ita ce ƙofar.
Tsarin samarwa ya yanke shawarar cewa magudanar ruwa da tushen MOSFET yana da ma'ana, kuma ana iya yin musanya da juna, kuma ba zai shafi yin amfani da kewayawa ba, kewayawa shima al'ada ne a wannan lokacin, don haka babu buƙatar tafiya. zuwa wuce gona da iri. Juriya tsakanin magudanar ruwa da tushen shine kusan 'yan dubun ohms. Ba za a iya amfani da wannan hanyar don tantance kofa na nau'in kofa mai rufi MOSFET ba. Domin juriya na shigar da wannan MOSFET yana da matuƙar girma, kuma ƙarfin ƙarfin da ke tsakanin kofa da tushe yana da ƙanƙanta sosai, ana iya yin ma'auni kaɗan kaɗan na caji a saman tsakar polar. ƙarfin ƙarfin wutar lantarki mai girman gaske, MOSFET zai kasance da sauƙin lalacewa.
3.Kimanin ƙarfin haɓakawa na MOSFETs
Lokacin da multimeter aka saita zuwa R × 100, yi amfani da jan alkalami don haɗa tushen S, kuma yi amfani da baƙar alƙalami don haɗa magudanar ruwa D, wanda yayi kama da ƙara ƙarfin lantarki 1.5V zuwa MOSFET. A wannan lokacin allurar tana nuna ƙimar juriya tsakanin sandar DS. A wannan lokacin tare da yatsa don tsunkule gate G, ƙarfin lantarki na jiki ya haifar da siginar shigarwa zuwa gate ɗin. Saboda rawar MOSFET amplification, ID da UDS za su canza, ma'ana cewa juriya tsakanin sandar DS ya canza, zamu iya lura cewa allurar tana da girman girman juyawa. Idan hannu ya tsunkule ƙofar, jujjuyawar allurar ƙanƙanta ce, wato, ƙarfin ƙarar MOSFET yana da rauni sosai; idan allurar ba ta da ƙaramin aiki, yana nuna cewa MOSFET ta lalace.
Lokacin aikawa: Yuli-18-2024
