FETs ndi mmene ntchito

FETs ndi anthu zipangizo michenga yopangira zida zamagetsi, mfundo ya ntchito zomwe zachokera kulimbikira ndi yopingasa munda magetsi kusinthasintha mawu a nkhani michenga yopangira zida zamagetsi.

The amadziwika a mtundu umenewu chipangizo ndi kuti munda zotsatira transistors mkulu voteji phindu ndi kukana mkulu lilinkudza.

Mu zipangizozi polenga ndi magetsi yekha mlandu onyamula yofanana PALI (ma elekitironi).

Pali mitundu iwiri ya FETs:

- kukhala dongosolo TIR, i.e. zitsulo, kenako dielectric, ndiye michenga yopangira zida zamagetsi (Mis);

- Kubweza ndi pn-zolumikizanazo.

Kapangidwe ka losavuta munda zotsatira transistor zikuphatikizapo mbale unapangidwa michenga yopangira zida zamagetsi zakuthupi ndi chimodzi pn-kusintha yekha pakati ndi ohmic ojambula pa konsekonse.

The elekitirodi ngati chipangizo womwe kuchititsa njira mlandu zonyamulira amatchedwa gwero ndi elekitirodi limene maelekitirodi ndi kutuluka njira - kuda.

Nthawi zina zimachitika kuti munthu wamphamvu kiyi chipangizo kunja kwa dongosolo. Choncho, nthawi yokonza zida pakompyuta zambiri zofunika kuti aletse FET.

Kuti tichite zimenezi, vypayat chipangizo, chifukwa izo sadzatha kuonanso dera la zamagetsi. Ndiyeno, kutsatira malangizo, chitani potuluka.

Field zotsatira transistors ndi modes opaleshoni awiri - zazikulu ndi kiyi.

Transistor ntchito - ndi imodzi mwa njira zimene transistor ndi mu maiko awiri - kwathunthu poyera kapena kwathunthu chatsekedwa. Koma boma wapakatikati, pamene chigawo chimodzi ndi lotsegula pang'ono kwina.

Pankhani abwino, pamene transistor ndi "kutsegula", i.e. ndi otchedwa machulukitsidwe mode, impedance pakati pa malo "kuda" ndi "kasupe" kuti ziro.

Mphamvu imfa pa lotseguka boma voteji limapezeka mankhwala (wofanana ziro) kuchuluka kwa panopa. Choncho, mphamvu madyaidya ndikuledzera ndi ziro.

Mu mode cutoff, i.e. pamene transistor midadada, kulimbikira pakati ake "kuda / gwero njira" deduces amamuchititsa osawerengeka. Mphamvu madyaidya ndikuledzera mu boma chatsekedwa ndi mankhwala a voteji kudutsa phindu panopa wofanana ziro. Choncho, mphamvu imfa = 0.

Iwo likukhalira kuti mode chifungulo cha transistors mphamvu imfa ndi ziro.

Zochita mu transistor lotseguka, mwachibadwa, kutsutsana "kuda / gwero njira" adzakhalapo. Ndi chatsekedwa transistor kuganiza izi panopa otsika mtengo akadali amapezeka. Choncho, mphamvu imfa mu mode malo amodzi mu transistor ndi kochepa.

A pompopompo, pamene transistor chatsekedwa kapena anatsegula, boosts liniya dera ake mfundo opaleshoni komwe panopa likuyenderera mu transistor ndi, conventionally theka la kuda panopa. Koma voteji "lakuya / gwero" kawirikawiri ukufika theka phindu pazipita. Choncho, mphamvu Kugawilidwa kwanthaka mode amapereka transistor yaikulu mphamvu imfa, yomwe amachepetsa "ayi" chinsinsi mode chidwi katundu.

Koma nawonso, kukhudzana yaitali ya transistor mu mode zazikulu n'chochepa kwambiri kuposa kutalika kwa anakhala mu mode malo amodzi. Chifukwa, dzuwa la siteji transistor amene umagwira ntchito kusintha mode, ndi lalitali kwambiri, ndipo kungakhale nainte atatu ndi anayi mphambu zisanu ndi zitatu pa zana.

Field zotsatira transistors amene umagwira ntchito mode pamwamba, ndi mokwanira chimagwiritsidwa ntchito mphamvu akatembenuka mayunitsi, ndi kugunda kochokera mphamvu, magawo linanena bungwe la transmitters zina ndi zina zotero.