MOSFETs ua haujlwm li cas?

1, MOSFETkev taw qhia

FieldEffect Transistor abbreviation (FET)) lub npe MOSFET. los ntawm ib tug me me ntawm cov cab kuj koom nyob rau hauv lub tshav kub conduction, kuj hu ua multi-ncej transistor. Nws belongs rau voltage mastering hom semi-superconductor mechanism. Muaj cov khoom tso tawm kuj yog siab (10^8 ~ 10^9Ω), tsis tshua muaj suab nrov, tsis tshua muaj zog noj, zoo li qub ntau yam, yooj yim rau kev koom ua ke, tsis muaj qhov tshwm sim thib ob, kev tuav pov hwm txoj haujlwm ntawm hiav txwv dav thiab lwm yam zoo, tam sim no tau hloov pauv. lub bipolar transistor thiab fais fab hlws ris transistor ntawm cov muaj zog sib koom tes.

 

2, MOSFET cov yam ntxwv

1, MOSFET yog lub tshuab hluav taws xob tswj hluav taws xob, nws los ntawm VGS (qhov rooj qhov hluav taws xob) tswj ID (drain DC);

2, MOSFET'stso zis DC ncej yog me me, yog li cov zis kuj yog loj.

3, nws yog daim ntawv thov ntawm cov neeg nqa khoom me me los ua kom sov, yog li nws muaj kev ntsuas zoo dua qub;

4, nws muaj cov kev txo qis ntawm cov hluav taws xob txo coefficient yog me dua li cov triode muaj cov kev txo qis ntawm cov coefficient txo;

5, MOSFET anti-irradiation muaj peev xwm;

6, vim tsis muaj kev ua haujlwm tsis zoo ntawm oligon dispersion tshwm sim los ntawm cov khoom tawg ntawm cov suab nrov, yog li lub suab nrov tsawg.

 

3, MOSFET txoj haujlwm ua haujlwm

MOSFET'skev khiav hauj lwm hauv paus ntsiab lus nyob rau hauv ib kab lus, yog "drain - qhov chaw nruab nrab ntawm tus ID ntws los ntawm cov channel rau lub rooj vag thiab cov channel ntawm pn junction tsim los ntawm qhov kev tsis ncaj ncees ntawm lub rooj vag voltage tswv ID", kom meej, ID ntws los ntawm qhov dav. ntawm txoj kev, uas yog, channel cross-sectional cheeb tsam, yog qhov kev hloov pauv ntawm qhov rov qab kev tsis ncaj ncees ntawm pn kev sib tshuam, uas ua rau cov txheej txheem depletion yog vim li cas rau qhov kev hloov pauv txuas ntxiv. Nyob rau hauv lub hiav txwv uas tsis yog-saturated ntawm VGS = 0, txij li thaum lub expansion ntawm qhov kev hloov txheej yog tsis loj heev, raws li qhov sib ntxiv ntawm cov hlau nplaum ntawm VDS ntawm qhov ntws-qhov, qee cov electrons nyob rau hauv lub hiav txwv yog rub tawm los ntawm qhov chaw. ntws, piv txwv li, muaj DC ID ua haujlwm los ntawm qhov ntws mus rau qhov chaw. Cov txheej txheem nruab nrab ntawm lub rooj vag mus rau qhov ntws ua rau tag nrho lub cev ntawm cov channel tsim ib hom thaiv, ID puv. Hu rau daim ntawv no yog pinch-off. Symbolizing txheej hloov mus rau channel ntawm tag nrho cov kev cuam tshuam, es tsis yog DC fais fab tuag raug txiav tawm.

 

Vim tias tsis muaj kev ywj pheej ntawm cov hluav taws xob thiab qhov nyob hauv cov txheej txheem hloov pauv, nws yuav luag insulating cov khoom nyob rau hauv daim ntawv zoo tagnrho, thiab nws yog qhov nyuaj rau cov dej ntws dav dav. Tab sis tom qab ntawd cov hluav taws xob hluav taws xob nruab nrab ntawm cov dej ntws - qhov tseeb, ob txoj kev hloov pauv txheej tiv thaiv cov dej ntws thiab lub rooj vag ncej ze ntawm qhov qis, vim tias cov hluav taws xob hluav taws xob rub cov hluav taws xob ceev ceev los ntawm cov txheej txheem hloov pauv. Qhov kev siv ntawm qhov drift teb yog yuav luag tas mus li ua qhov puv ntawm ID scene.

 

Lub Circuit Court siv ua ke ntawm kev txhim kho P-channel MOSFET thiab kev txhim kho N-channel MOSFET. Thaum cov tswv yim qis, P-channel MOSFET ua haujlwm thiab cov zis txuas nrog rau lub davhlau ya nyob twg zoo ntawm cov khoom siv hluav taws xob. Thaum cov kev tawm tswv yim siab, N-channel MOSFET ua thiab cov zis txuas nrog lub zog hluav taws xob hauv av. Hauv qhov Circuit Court no, P-channel MOSFET thiab N-channel MOSFET ib txwm ua haujlwm nyob rau hauv cov xeev sib txawv, nrog rau lawv cov theem inputs thiab outputs thim rov qab.