1.Junction MOSFET pini identification
Gedhi reMOSFET ndiyo hwaro hwe transistor, uye dhiri uye sosi ndiyo muunganidzi uye emitter yeinowirirana transistor. Iyo multimeter kusvika kuR × 1k giya, ine mapeni maviri ekuyera kumberi uye kudzosera kuramba pakati pemapini maviri. Kana maviri-pini mberi kupikisa = reverse resistance = KΩ, kureva, mapini maviri echitubu S uye kudonhedza D, imwe yepini ndiyo gedhi G. Kana iri 4-pinijunction MOSFET, rimwe danda kushandiswa kwenhoo yepasi.
2.Sarudza gedhi
Nepeni nhema yemultimeter yekubata MOSFET a random electrode, chinyoreso dzvuku kubata mamwe maelectrode maviri. Kana zvese zvakayerwa kuramba zviri zvidiki, zvichiratidza kuti zvese zviri positive kuramba, chubhu ndeyaN-channel MOSFET, chinyoreso chitema chimwechete chiri zvakare gedhi.
Maitiro ekugadzira akafunga kuti kudonhedza uye sosi yeMOSFET yakaenzana, uye inogona kuchinjana nemumwe, uye haizokanganisa kushandiswa kwedunhu, dunhu rakajairika panguva ino, saka hapana chikonzero chekuenda. kune musiyano wakanyanyisa. Kupokana pakati pemvura uye sosi kunenge zviuru zvishoma ohms. Haikwanise kushandisa nzira iyi kuona gedhi reiyo insulated gedhi mhando MOSFET. Nekuti kupokana kwekuiswa kweMOSFET iyi kwakakwira zvakanyanya, uye iyo inter-polar capacitance pakati pegedhi uye sosi idiki kwazvo, kuyerwa kwehushoma sehushoma hwemutero, hunogona kuumbwa pamusoro pepakati-polar. kugona kweiyo yakanyanya kukwira voltage, iyo MOSFET ichave nyore kukuvadza.
3.Kufungidzira kugona kwekusimudzira kweMOSFETs
Kana iyo multimeter yaiswa kuR × 100, shandisa chinyoreso dzvuku kubatanidza sosi S, uye shandisa peni nhema kubatanidza iyo D, iyo yakafanana nekuwedzera 1.5V voltage kuMOSFET. Panguva ino tsono inoratidza kukosha kwekupikisa pakati peDS pole. Panguva ino nemunwe kudzvanya gedhi G, simba remuviri rakakonzerwa sechiratidzo chekupinza kugedhi. Nekuda kwebasa rekusimudzira kweMOSFET, ID neUDS zvichachinja, zvichireva kuti kuramba pakati peDS pole kwachinja, tinogona kuona kuti tsono ine yakakura swing amplitude. Kana ruoko ruchipinza gedhi, kuzungunuka kwetsono kudiki kwazvo, ndiko kuti, kugona kweMOSFET kukwidziridza hakuna kusimba; kana tsono yacho isina kuita zvishoma, zvichiratidza kuti MOSFET yakuvadzwa.
Nguva yekutumira: Jul-18-2024
