Faham mabda'a shaqada ee MOSFET oo si hufan u isticmaal qaybaha elektiroonigga ah

Fahamka mabaadi'da hawlgelinta MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistor) ayaa muhiim u ah si wax ku ool ah looga faa'iidaysto qaybahan elektiroonigga ah ee waxtarka sare leh. MOSFETs waa walxo lagama maarmaanka u ah aaladaha elegtarooniga ah, fahamkoodana waxay lama huraan u tahay soosaarayaasha.

Ficil ahaan, waxaa jira soosaarayaal aan si buuxda u qadarin shaqooyinka gaarka ah ee MOSFET-yada inta lagu jiro codsigooda. Si kastaba ha ahaatee, iyadoo la fahmayo mabaadi'da shaqada ee MOSFET ee aaladaha elektiroonigga ah iyo doorarkooda u dhigma, qofku wuxuu si xeeladaysan u dooran karaa MOSFET-ka ugu habboon, iyadoo la tixgelinayo sifooyinka gaarka ah iyo sifooyinka gaarka ah ee alaabta. Habkani wuxuu kor u qaadayaa waxqabadka badeecada, isagoo xoojinaya tartankiisa suuqa.

WINSOK SOT-23-3 xirmo MOSFET

MOSFET Mabaadi'da Shaqada

Marka korantada isha-albaabka (VGS) ee MOSFET ay eber tahay, xitaa iyadoo la adeegsanayo korantada ilo-biyoodka (VDS), had iyo jeer waxaa jira isgoysyada PN ee eexda, taasoo keenta in uusan jirin kanaalka korantada (iyo hadda ma jiro) inta u dhaxaysa biya-mareenka iyo isha MOSFET. Xaaladdan, qulqulka hadda (ID) ee MOSFET waa eber. Codsashada danab togan oo u dhexeeya albaabka iyo isha (VGS> 0) waxay abuurtaa beer koronto lakabka dahaadhka ee SiO2 ee u dhexeeya albaabka MOSFET iyo substrate silikoon, oo laga hagayo albaabka dhinaca substrate-ka Silikoon ee nooca P. Marka la eego in lakabka oksaydhku uu daboolayo, korantada lagu dabaqay albaabka, VGS, kama dhalin karto hadda MOSFET. Taa beddelkeeda, waxay samaysaa capacitor oo dhan lakabka oksaydhka.

Marka VGS si tartiib tartiib ah u kordho, capacitor-ku wuu dalacaa, abuuraa beer koronto. Soo jiidashada danabka togan ee albaabka, electrons tiro badan ayaa ku urura dhinaca kale ee capacitor-ka, samaynta kanaalka korantada N-nooca ka soo qulqulka ilaa isha MOSFET. Marka VGS ay dhaafto heerka korantada VT (sida caadiga ah agagaarka 2V), kanaalka N-ka ee MOSFET wuxuu qabtaa, isagoo bilaabaya qulqulka qulqulka aqoonsiga hadda jira. Danabka isha-albaabka ee kanaalka uu bilaabo inuu sameeyo waxaa loo tixraacaa sida heerka korantada VT. Iyada oo la xakameynayo baaxadda VGS, iyo sidaas awgeed goobta korontada, cabbirka aqoonsiga hadda jira ee MOSFET waa la beddeli karaa.

WINSOK DFN5x6-8 xirmo MOSFET

Codsiyada MOSFET

MOSFET waxay caan ku tahay sifooyinkeeda beddelka ee wanaagsan, taasoo horseedaysa codsigeeda ballaaran ee wareegyada u baahan furayaasha elektaroonigga ah, sida sahayda korantada ee nooca beddelka ah. Codsiyada korantada yar ee la isticmaalayo koronto 5V ah, isticmaalka qaab dhaqameedyada ayaa keenaya hoos u dhac danab ah oo ku yimaada saldhigga-emitter transistor-ka laba-cirifoodka (qiyaastii 0.7V), oo ka tagaya kaliya 4.3V danab kama dambays ah oo lagu dabaqay albaabka MOSFET. Xaaladahan oo kale, doorashada MOSFET oo leh danab albaabka magaciisu yahay 4.5V waxay soo bandhigaysaa khataro gaar ah. Caqabaddani waxay sidoo kale ka muuqataa codsiyada ku lug leh 3V ama qalabka kale ee korantada yar.