Kev lees paub ntawm Insulated Layer Gate MOSFETs

Rwb thaiv tsev txheej rooj vag hom MOSFET aliasMOSFET (tom qab no hu ua MOSFET), uas muaj ib lub cable sheath ntawm silicon dioxide nyob rau hauv nruab nrab ntawm lub rooj vag voltage thiab qhov chaw ntws.

MOSFET kuj yogN-channel thiab P-channel ob pawg, tab sis txhua pawg tau muab faib ua kev txhim kho thiab lub teeb depletion hom ob, yog li muaj tag nrho plaub hom:N-channel txhim kho, P-channel txhim kho, N-channel lub teeb depletion, P-channel lub teeb depletion hom. Tab sis qhov twg lub qhov rooj qhov hluav taws xob yog xoom, qhov ntws tam sim no kuj yog xoom ntawm cov yeeb nkab yog kho kom zoo nkauj. Txawm li cas los xij, qhov twg lub qhov rooj qhov hluav taws xob yog xoom, qhov ntws tam sim no tsis yog xoom yog categorized li lub teeb-siv hom raj.
Txhim kho MOSFET txoj cai:

Thaum ua hauj lwm nyob rau hauv nruab nrab ntawm lub rooj vag qhov chaw tsis siv qhov voltage, qhov nruab nrab ntawm qhov ntws qhov chaw PN hlws ris yog nyob rau hauv lub opposite kev taw qhia, yog li ntawd yuav tsis muaj conductive channel, txawm yog hais tias nyob rau hauv nruab nrab ntawm lub ntws qhov chaw nrog ib tug voltage. conductive trench hluav taws xob raug kaw, nws tsis tuaj yeem muaj qhov ua haujlwm tam sim no raws li. Thaum nruab nrab ntawm lub rooj vag qhov chaw ntxiv rau qhov kev taw qhia zoo voltage mus rau ib qho nqi, nyob rau hauv nruab nrab ntawm lub qhov dej ntws yuav tsim ib tug conductive kev nyab xeeb channel, thiaj li hais tias cov conductive trench tsuas yog tsim los ntawm lub qhov rooj qhov hluav taws xob voltage hu ua qhib voltage VGS, loj qhov nruab nrab ntawm lub qhov rooj qhov hluav taws xob qhov hluav taws xob, cov conductive trench yog wider, uas nyob rau hauv lem ua los ntawm qhov ntau dua qhov khiav ntawm hluav taws xob.

Lub hauv paus ntsiab lus ntawm Lub Teeb Dissipative MOSFET:

Hauv kev ua haujlwm, tsis muaj qhov hluav taws xob siv nyob rau hauv nruab nrab ntawm lub rooj vag qhov chaw, tsis zoo li kev txhim kho hom MOSFET, thiab cov kab hluav taws xob muaj nyob rau hauv nruab nrab ntawm qhov dej ntws, yog li tsuas yog qhov hluav taws xob zoo ntxiv rau nruab nrab ntawm qhov ntws, uas. ua rau cov dej ntws tawm tam sim no. Ntxiv mus, lub rooj vag qhov chaw nyob rau hauv nruab nrab ntawm qhov zoo kev taw qhia ntawm lub voltage, lub conductive channel expansion, ntxiv qhov opposite kev taw qhia ntawm lub voltage, lub conductive channel shrinks, los ntawm cov ndlwg ntawm hluav taws xob yuav me me, nrog rau kev txhim kho ntawm MOSFET kev sib piv, nws kuj tuaj yeem yog tus lej zoo thiab tsis zoo ntawm qee thaj tsam hauv cov channel conductive.

MOSFET kev ua tau zoo:

Ua ntej, MOSFETs yog siv los ua kom loj. Vim hais tias cov input kuj ntawm MOSFET amplifier yog siab heev, yog li lub lim capacitor yuav me me, tsis tas yuav tsum tau siv electrolytic capacitor.

Qhov thib ob, MOSFET siab heev input kuj yog tshwj xeeb tshaj yog haum rau cov yam ntxwv impedance hloov dua siab tshiab. Feem ntau siv nyob rau hauv multi-level amplifier input theem rau cov yam ntxwv impedance conversion.

MOSFET tuaj yeem siv los ua qhov hloov pauv tau.

Plaub, MOSFET tuaj yeem yooj yim raws li DC fais fab mov.

V. MOSFET tuaj yeem siv los ua cov khoom hloov pauv.