1, hunhu kutongaMOSFETchakanaka kana chakaipa
MOSFET kutsiva musimboti uye yakanaka kana yakaipa kutonga, tanga washandisa multimeter R × 10kΩ block (yakavakirwa-mukati 9V kana 15V bhatiri), iyo isina kunaka peni (dema) yakabatana negedhi (G), iyo yakanaka peni (tsvuku) yakabatana kune tsime (S). Paunenge uchichaja pakati pegedhi uye sosi, iyo multimeter pointer ichave yakatsauka zvishoma. Zvekare uchishandisa multimeter R × 1Ω block, iyo isina kunaka peni kune yekudonhedza (D), iyo peni yakanaka kune sosi (S), iyo multimeter inoratidza kukosha kwemaohm mashoma, zvichiratidza kuti iyo MOSFET yakanaka.
2, kuongororwa kwemhando yejunction MOSFET electrode
Iyo multimeter ichadaidzwa kuR × 100 faira, peni tsvuku kune chero tsoka imwe chubhu, dema peni kune imwe, kuitira kuti tsoka yechitatu imiswe. Kana iwe ukawana kuzununguka kudiki kwemamita tsono, ratidza kuti tsoka yechitatu ndiyo gedhi. Kana iwe uchida kuwana zvimwe zvinobuda pachena, unogona zvakare kushandisa muviri uri padyo kana nemunwe kubata tsoka yakarembera, chero iwe uchiona tsono yakanyura zvakanyanya, zvichiratidza kuti tsoka yakarembera yegedhi, the kusara tsoka mbiri dzechitubu uye kudonhedza, zvichiteerana.
Zvikonzero zvekusarura:JFETkupinza kwekupokana kwakakura kupfuura 100MΩ, uye transconductance yakakwira zvakanyanya, kana gedhi rakavhurika-dunhu, nzvimbo yemagetsi magineti inogona kuve nyore kupesvedzerwa negedhi voltage chiratidzo, kuitira kuti chubhu iite kucheka, kana kuita conduction. Kana muviri wemunhu wakananga kugedhi induction voltage, nekuda kwekupindira kwekupindira chiratidzo chakasimba, chiitiko chiri pamusoro chichava pachena. Semuyenzaniso, tsono yekuruboshwe yakarerekera yakakura kwazvo, zvinoreva kuti chubhu inoda kudimbura, drain-source resistance RDS inowedzera, drain-source current inoderedza IDS. pane zvinopesana, tsono kudivi rekurudyi rekutsauka kukuru, iyo chubhu inotarisa kuitisa, RDS ↓, IDS ↑. Nekudaro, ndeipi nhungamiro iyo mita yetsono inotsausa inofanirwa kutariswa neiyo polarity yeiyo induced voltage (mberi kana reverse voltage) nenzvimbo yekushandisa yechubhu.
Zvekungwaririra:
Mhedzisiro yebvunzo inoratidza kuti kana maoko ese akavharirwa kubva kuD uye S matanda uye chete gedhi rinobatwa, tsono yemamita inowanzo tsauka kuruboshwe. Nekudaro, kana maoko ese achibata mapango eD neS zvakateerana uye zvigunwe zvichibata gedhi, tsono yemamita inogona kucherechedzwa kutsaukira kurudyi. Chikonzero cheizvi ndechekuti zvikamu zvinoverengeka zvemuviri wemunhu uye kuramba zvakarerekeraMOSFETmunzvimbo yekuzadza.
Crystal triode pini kutsunga
Triode inoumbwa nemusimboti (mbiri PN junctions), maelectrodes matatu nechubhu shell, maelectrode matatu anonzi muunganidzi c, emitter e, base b. Parizvino, iyo yakajairika triode isilicon planar chubhu, iyo yakakamurwazve kuita mapoka maviri: PNP-mhando uye NPN-mhando. Machubhu eGermany alloy haawanzo kuwanikwa.
Pano tichazivisa nzira iri nyore yekushandisa multimeter kuyera tsoka nhatu dzetriode.
1, tsvaga danda rekutanga, sarudza rudzi rwechubhu (NPN kana PNP)
KuPNP-type triode, C uye E matanda ndiwo matanda akanaka ezvikamu zviviri zvePN mukati maro, uye B danda ndiro rayo rinowanzoita risina kunaka, nepo NPN-mhando triode yakapesana, C uye E matanda ndiwo matanda asina kunaka. yezvikamu zviviri zvePN, uye B danda ndiyo yakajairika danda rakanaka, uye zviri nyore kuona danda rekutanga uye rudzi rwechubhu zvinoenderana nehunhu hwePN junction's positive resistance idiki, uye reverse regino yakakura. . Iyo chaiyo nzira ndeye:
Shandisa multimeter yakadanwa paR × 100 kana R × 1K giya. Chinyoreso chitsvuku chibata pini, wobva washandisa chinyoreso nhema chakabatanidzwa kune mamwe mapini maviri, kuitira kuti iwe ugone kuwana mapoka matatu (boka rimwe nerimwe remaviri) kuverenga, kana imwe yemaseti maviri ekuverenga ari mukushomeka kwekushomeka kwe. mazana mashoma ohms, kana mapini eruzhinji ari peni dzvuku, iyo yekubata ndiyo hwaro, iyo transistor mhando yePNP mhando; kana mapini eruzhinji ari chinyoreso nhema, kubatwa ndicho chigadziko, mhando yetransistor yerudzi rweNPN.
2, ratidza emitter uye muunganidzi
Sekugadzirwa kwematriode, maviri P nharaunda kana maviri N nzvimbo mukati meiyo doping concentration yakasiyana, kana iyo chaiyo amplifier, iyo triode ine yakasimba amplifier, uye zvinopesana, neiyo isiriyo amplifier, iyo amplifier yekuwedzera kwenhamba huru isina kusimba. , saka triode ine amplifier yakarurama, iyo triode ine isina kururama amplifier, pachava nekusiyana kukuru.
Mushure mekuzivisa rudzi rwechubhu uye chigadziko b, muunganidzi uye emitter anogona kuzivikanwa nenzira inotevera. Dhonza iyo multimeter nekudzvanya R x 1K. Pinza chigadziko uye imwe pini pamwe chete nemaoko maviri (chenjerera kuti usarega ma electrode achisangana zvakananga). Kuti uite chiitiko chekuyera kuve pachena, nyorovesa zvigunwe zvako, dzvanya peni dzvuku nechigadziko, dzvanya peni dema neimwe pini, uye teerera ukuru hwekurudyi kwekurudyi kweiyo multimeter pointer. Zvadaro, gadzirisa mapini maviri, dzokorora matanho ekuyera ari pamusoro. Enzanisa amplitude yekuzununguka kwetsono muzviyero zviviri uye tsvaga chikamu chine kuzunguza kukuru. Kune PNP-mhando transistors, batanidza chinyoreso nhema kune pini uye pini yepasi pamwe chete, dzokorora zviyedzo zviri pamusoro kuti uone kuti tsono inozunguza amplitude yakakura sei, yeNPN-mhando, peni nhema yakabatana kune hwaro, iyo tsvuku. peni yakabatana kune emitter. Murudzi rwePNP, peni dzvuku yakabatana kune muunganidzi, peni yakasviba yakabatana kune emitter.
Nheyo yeiyi nzira yekuzivikanwa ndeyekushandisa bhatiri mune multimeter, iyo voltage inowedzerwa kune muunganidzi uye emitter ye transistor, kuitira kuti igone kukwidziridza. Ruoko pinza hwaro hwaro, muunganidzi, akaenzana nekupikisa kuburikidza neruoko kune triode pamwe neakanaka bias ikozvino, kuitira kuti iite, panguva ino ukuru hwemamita tsono ichizungunuka kurudyi kunoratidza kugona kwayo kukwidziridzwa, saka unogona nemazvo. sarudza nzvimbo ye emitter, muunganidzi.
Nguva yekutumira: Kubvumbi-21-2024
