Kev siv MOSFET yog dab tsi?

MOSFETstau siv dav. Tam sim no qee qhov kev sib xyaw ua ke loj tau siv MOSFET, kev ua haujlwm yooj yim thiab BJT transistor, hloov pauv thiab nthuav dav. Yeej BJT triode tuaj yeem siv qhov twg nws tuaj yeem siv tau, thiab hauv qee qhov chaw qhov kev ua tau zoo dua li triode.

Amplification ntawm MOSFET

MOSFET thiab BJT triode, txawm hais tias ob qho tib si semiconductor amplifier ntaus ntawv, tab sis ntau qhov zoo dua li cov triode, xws li kev tawm tswv yim siab, lub teeb liab yuav luag tsis muaj tam sim no, uas yog qhov tsim nyog rau kev ruaj ntseg ntawm cov teeb liab tawm tswv yim. Nws yog ib qho khoom siv zoo tshaj plaws raws li lub tswv yim theem amplifier, thiab tseem muaj qhov zoo ntawm cov suab nrov qis thiab zoo kub stability. Nws feem ntau yog siv los ua preamplifier rau lub suab amplification circuits. Txawm li cas los xij, vim tias nws yog cov cuab yeej tswj hluav taws xob tam sim no, qhov ntws tawm tam sim no yog tswj los ntawm qhov hluav taws xob nruab nrab ntawm lub rooj vag qhov chaw, lub amplification coefficient ntawm low-frequency transconductance feem ntau tsis loj, yog li lub peev xwm amplification tsis zoo.

Hloov cov nyhuv ntawm MOSFET

MOSFET siv los ua kev hloov hluav taws xob, vim tsuas yog cia siab rau polyon conductivity, tsis muaj xws li BJT triode vim lub hauv paus tam sim no thiab cov nqi khaws cia, yog li kev hloov ceev ntawm MOSFET yog nrawm dua li lub triode, raws li lub raj hloov. feem ntau yog siv rau high-frequency high-tam sim no zaus, xws li hloov cov khoom siv hluav taws xob siv hauv MOSFET nyob rau hauv high-frequency high-tam sim no lub xeev ntawm kev ua hauj lwm. Piv nrog BJT triode keyboards, MOSFET keyboards tuaj yeem ua haujlwm ntawm cov hluav taws xob me me thiab cov khoom siv tam sim no, thiab yooj yim rau kev sib koom ua ke ntawm silicon wafers, yog li lawv tau siv dav hauv kev sib xyaw ua ke loj.

Dab tsi yog qhov ceev faj thaum sivMOSFETs?

MOSFETs yog qhov muag heev dua li cov triodes thiab tuaj yeem raug puas tsuaj los ntawm kev siv tsis raug, yog li yuav tsum tau saib xyuas tshwj xeeb thaum siv lawv.

(1) Nws yog ib qho tsim nyog los xaiv hom MOSFET tsim nyog rau ntau zaus siv.

(2) MOSFETs, tshwj xeeb tshaj yog insulated-gate MOSFETs, muaj ib tug siab input impedance, thiab yuav tsum tau luv luv rau txhua electrode thaum tsis siv nyob rau hauv kom tsis txhob muaj kev puas tsuaj rau lub raj vim lub rooj vag inductance nqi.

(3) Lub rooj vag qhov hluav taws xob ntawm kev sib tshuam MOSFETs tsis tuaj yeem thim rov qab, tab sis tuaj yeem khaws cia hauv lub xeev qhib.

(4) Yuav kom tswj tau qhov kev tawm tswv yim siab ntawm MOSFET, lub raj yuav tsum tau tiv thaiv los ntawm noo noo thiab khaws cia qhuav hauv qhov chaw siv.

(5) Cov khoom raug them (xws li cov hlau nplaum, cov cuab yeej ntsuas, thiab lwm yam) nyob rau hauv kev sib cuag nrog MOSFET yuav tsum tau muab tso rau hauv av kom tsis txhob muaj kev puas tsuaj rau lub raj. Tshwj xeeb tshaj yog thaum welding insulated rooj vag MOSFET, raws li lub hauv paus - lub rooj vag sequential kev txiav txim ntawm vuam, nws yog qhov zoo tshaj rau welding tom qab fais fab tuag. Lub zog ntawm cov hlau soldering rau 15 ~ 30W yog qhov tsim nyog, lub sijhawm vuam yuav tsum tsis pub tshaj 10 vib nas this.

(6) Lub rooj vag insulated MOSFET tsis tuaj yeem kuaj nrog lub tshuab multimeter, tsuas yog tuaj yeem kuaj nrog tus ntsuas, thiab tsuas yog tom qab nkag mus rau lub tester kom tshem tawm qhov luv-circuit thaiv ntawm cov electrodes. Thaum tshem tawm, nws yog ib qho tsim nyog kom luv luv Circuit Court cov electrodes ua ntej tshem tawm kom tsis txhob muaj rooj vag overhang.

(7) Thaum sivMOSFETsnrog substrate leads, lub substrate leads yuav tsum tau txuas kom zoo.