Qhov tseem ceeb ntawm MOSFETs thiab kev sib piv nrog triodes

Field Effect Transistor abbreviated asMOSFET.Nws muaj ob lub ntsiab: junction field effect tubes thiab metal-oxide semiconductor field effect tubes. Lub MOSFET tseem hu ua unipolar transistor nrog rau feem ntau ntawm cov cab kuj koom nrog hauv cov conductivity. Lawv yog cov khoom siv hluav taws xob tswj hluav taws xob semiconductor. Vim nws cov kev tawm tswv yim siab, tsis muaj suab nrov, tsis muaj zog noj, thiab lwm yam ntxwv, ua rau nws muaj zog sib tw rau bipolar transistors thiab fais fab transistors.

I. Qhov tseem ceeb ntawm MOSFET

1, DC parameter

Saturation ntws tam sim no tuaj yeem txhais tau tias yog qhov ntws tawm tam sim no sib raug rau thaum qhov hluav taws xob ntawm lub rooj vag thiab qhov chaw sib npaug rau xoom thiab qhov hluav taws xob ntawm qhov ntws thiab qhov chaw yog ntau dua li qhov hluav taws xob pinch-off voltage.

Pinch-off voltage UP: UGS yuav tsum tau txo tus ID mus rau ib qho me me tam sim no thaum UDS paub tseeb;

Tig-on voltage UT: UGS yuav tsum nqa ID rau qee tus nqi thaum UDS yog qhov tseeb.

2, AC Parameters

Low-frequency transconductance gm : Piav qhia txog kev tswj xyuas ntawm lub rooj vag thiab qhov hluav taws xob ntawm qhov dej ntws tam sim no.

Inter-pole capacitance: lub capacitance ntawm peb lub electrodes ntawm MOSFET, tus nqi me dua, qhov ua tau zoo dua.

3, txwv tsis pub

Cov dej ntws tawm, qhov chaw tawg qhov hluav taws xob: thaum lub qhov ntws tawm tam sim no nce siab, nws yuav ua rau cov av tawg tawg thaum UDS.

Gate breakdown voltage: junction field effect tube ib txwm ua haujlwm, rooj vag thiab qhov chaw nruab nrab ntawm PN hlws ris hauv lub xeev tsis ncaj ncees lawm, qhov tam sim no loj dhau los ua kom tawg.

II. Yam ntxwv ntawmMOSFETs

MOSFET muaj ib qho kev ua kom muaj zog thiab tuaj yeem tsim ib lub voj voog loj. Piv nrog rau triode, nws muaj cov yam ntxwv hauv qab no.

(1) MOSFET yog cov khoom siv hluav taws xob tswj hluav taws xob, thiab lub peev xwm tswj tau los ntawm UGS;

(2) Tam sim no ntawm cov tswv yim ntawm MOSFET yog qhov tsawg heev, yog li nws cov tswv yim tiv thaiv siab heev;

(3) Nws qhov kub thiab txias stability yog qhov zoo vim nws siv feem ntau cov cab kuj rau conductivity;

(4) Qhov voltage amplification coefficient ntawm nws amplification Circuit Court yog me dua li ntawm triode;

(5) Nws tiv taus hluav taws xob ntau dua.

Peb,MOSFET thiab transistor kev sib piv

(1) MOSFET qhov chaw, rooj vag, ntws thiab triode qhov chaw, puag, teeb taw tes ncej sib haum mus rau lub luag hauj lwm zoo sib xws.

(2) MOSFET yog ib qho khoom siv hluav taws xob tswj tam sim no, lub zog amplification coefficient me me, lub peev xwm amplification tsis zoo; triode yog cov cuab yeej tswj hluav taws xob tam sim no, lub peev xwm amplification muaj zog.

(3) MOSFET rooj vag yeej tsis siv tam sim no; thiab triode ua haujlwm, lub hauv paus yuav nqus tau qee yam tam sim no. Yog li ntawd, MOSFET rooj vag input tsis kam yog siab tshaj qhov triode input kuj.

(4) Cov txheej txheem conductive ntawm MOSFET muaj kev koom tes ntawm polytron, thiab triode muaj kev koom tes ntawm ob hom cab kuj, polytron thiab oligotron, thiab nws cov concentration ntawm oligotron yog heev cuam tshuam los ntawm kub, hluav taws xob thiab lwm yam, yog li ntawd, MOSFET Nws muaj qhov kub thiab txias thiab kev tiv thaiv hluav taws xob zoo dua li transistor. MOSFET yuav tsum raug xaiv thaum cov xwm txheej ib puag ncig hloov pauv ntau.

(5) Thaum MOSFET txuas nrog lub hauv paus hlau thiab cov substrate, qhov chaw thiab cov dej tuaj yeem sib pauv tau thiab cov yam ntxwv tsis hloov ntau, thaum thaum lub collector thiab emitter ntawm lub transistor pauv, cov yam ntxwv txawv thiab tus nqi β. txo.

(6) Lub suab nrov ntawm MOSFET yog me me.

(7) MOSFET thiab triode tuaj yeem tsim los ntawm ntau yam amplifier circuits thiab switching circuits, tab sis yav tas los siv tsawg zog, siab thermal stability, ntau yam khoom voltage, yog li nws yog dav siv nyob rau hauv loj-scale thiab ultra-loj- scale integrated circuits.

(8) Qhov kev tiv thaiv ntawm triode yog qhov loj, thiab kev tiv thaiv ntawm MOSFET yog me me, yog li MOSFET feem ntau yog siv los ua cov keyboards nrog kev ua haujlwm siab dua.