Iindima ezintathu eziphambili zeeMOSFET

I-MOSFET edla ngokusetyenziswa iindima ezintathu eziphambili zizijikelezo zokukhulisa, ukuphuma okuthe gqolo kwangoku kunye nokuqhutywa kokutshintsha.

1, isiphaluka sokukhulisa

I-MOSFET ine-impedance ephezulu yegalelo, ingxolo ephantsi kunye nezinye iimpawu, ke ngoko, ihlala isetyenziswa njengokwandiswa kwamanqanaba amaninzi kwinqanaba lokufakwayo langoku, njengakwi-transistor, ngokwegalelo kunye neesekethe eziphuma kwisiphelo esiqhelekileyo sokhetho. ezahlukeneyo, zinokwahlulwa zibe ziindawo ezintathu zokukhutshwa kweseketheI-MOSFET, ngokulandelelanayo, umthombo oqhelekileyo, ukuvuza koluntu kunye nesango eliqhelekileyo. Lo mzobo ulandelayo ubonisa isekethe ye-MOSFET yomthombo oqhelekileyo wokwandisa, apho i-Rg isixhathisi sesango, ukuhla kombane we-Rs kongezwa esangweni; I-Rd yi-resistor ye-drain, i-drain current iguqulelwa kwi-drain voltage, echaphazela i-amplification multiplier Au; I-Rs ngumthombo wokumelana nomthombo, ukubonelela nge-voltage ye-bias yesango; I-C3 yi-bypass capacitor, isusa ukuthotywa kwe-AC signal nge-Rs.

2, umthombo wangoku wesekethe

Umthombo okhoyo ngoku usetyenziswa ngokubanzi kuvavanyo lwemitha, njengoko kubonisiwe kulo mfanekiso ungezantsi, ikakhulu uqulunqweI-MOSFETIsekethe yemithombo yangoku eqhubekayo, enokusetyenziswa njengenkqubo yokulinganisa iimitha zemagneto-yombane. Ekubeni i-MOSFET sisixhobo sokulawula uhlobo lwe-voltage, isango layo liphantse lingathathi okwangoku, i-impedance yegalelo iphezulu kakhulu. Ukuba imveliso yangoku enkulu eqhubekayo ifunwa ukuphucula ukuchaneka, indibaniselwano yereferensi yomthombo kunye nesithelekisi ingasetyenziselwa ukufumana umphumo oyifunayo.

3, isiphaluka sokutshintsha

Eyona ndima ibalulekileyo ye-MOSFET yindima yokutshintsha. Ukutshintsha, uninzi lweendlela ezahlukeneyo zolawulo lomthwalo we-elektroniki, ukutshintshela unikezelo lwamandla, njl njl. Olona phawu lubalulekileyo lwetyhubhu yeMOS lutshintsho lweempawu ezilungileyo,NMOS, I-Vgs inkulu kunexabiso elithile liya kuqhuba, elisebenzayo kwimeko yomthombo osekelwe phantsi, oko kukuthi, okubizwa ngokuba yi-low-end drive, ngokude nje ukuba i-voltage yesango ye-4V okanye i-10V ingaba. Kwi-PMOS, ngakolunye uhlangothi, i-Vgs engaphantsi kwexabiso elithile iya kuqhuba, esebenza kwimeko xa umthombo usekelwe kwi-VCC, oko kukuthi, i-high end drive. Nangona i-PMOS inokusetyenziswa ngokulula njengomqhubi wesiphelo esiphezulu, i-NMOS ihlala isetyenziswa kubaqhubi abaphezulu ngenxa yokuchasa okuphezulu, ixabiso eliphezulu, kunye neentlobo ezimbalwa zokutshintsha.

Ukongeza kwiindima ezintathu eziphambili ezikhankanyiweyo ngasentla, ii-MOSFETs zinokusetyenziswa njengezichasi eziguquguqukayo ukuqonda izichasi ezilawulwa ngumbane, kwaye zibe nezicelo ezininzi.