Peb lub luag haujlwm tseem ceeb ntawm MOSFETs

MOSFET feem ntau siv peb lub luag haujlwm tseem ceeb yog cov khoom siv hluav taws xob ua kom muaj zog, cov zis tam sim no tsis tu ncua thiab kev hloov pauv.

 

1, amplification Circuit Court

MOSFET muaj lub siab input impedance, tsis tshua muaj suab nrov thiab lwm yam ntxwv, yog li ntawd, nws yog feem ntau yog siv raws li ib tug multi-theem amplification ntawm lub tam sim no input theem, raws li zoo raws li lub transistor, raws li cov tswv yim thiab tso zis circuits ntawm qhov kawg ntawm kev xaiv. ntawm qhov sib txawv, tuaj yeem muab faib ua peb lub xeev ntawm cov kab hluav taws xob tawm ntawm lubMOSFET, ntsig txog, qhov chaw, pej xeem to thiab lub rooj vag. Cov duab hauv qab no qhia tau hais tias MOSFET ntau qhov chaw amplification Circuit Court, uas Rg yog lub rooj vag resistor, Rs voltage poob ntxiv rau lub rooj vag; Rd yog qhov ntws resistor, qhov ntws tawm tam sim no hloov mus rau qhov hluav taws xob ntws tawm, cuam tshuam rau qhov kev sib tw ua kom muaj zog Au; Rs yog lub hauv paus resistor, muab qhov tsis ncaj ncees rau lub rooj vag; C3 yog lub bypass capacitor, tshem tawm qhov attenuation ntawm AC teeb liab los ntawm Rs.

 

 

2, qhov chaw tam sim no Circuit Court

Qhov chaw tam sim no tau dav siv hauv kev ntsuas metrological, raws li qhia hauv daim duab hauv qab no, nws yog tsim los ntawmMOSFETqhov tam sim no qhov chaw Circuit Court, uas yuav siv tau raws li ib tug magneto-electric meter tuning scale txheej txheem. Txij li thaum lub MOSFET yog ib tug voltage-hom tswj ntaus ntawv, nws lub rooj vag yuav luag tsis siv tam sim no, lub input impedance siab heev. Yog tias qhov tso zis loj tas li tam sim no xav tau los txhim kho qhov tseeb, kev sib xyaw ua ke ntawm cov ntaub ntawv siv thiab sib piv tuaj yeem siv kom tau txais cov txiaj ntsig xav tau.

 

3, lub switching Circuit Court

Lub luag haujlwm tseem ceeb tshaj plaws ntawm MOSFET yog lub luag haujlwm hloov pauv. Switching, feem ntau ntawm ntau yam khoom siv hluav taws xob tswj, hloov hluav taws xob hloov hluav taws xob, thiab lwm yam. Qhov tseem ceeb tshaj plaws ntawm MOS raj yog qhov hloov ntawm cov yam ntxwv zoo, rauNMOs, Vgs yog ntau dua li ib qho txiaj ntsig yuav coj, siv tau rau cov ntaub ntawv ntawm qhov chaw hauv av, uas yog, hu ua low-end drive, ntev npaum li lub rooj vag voltage ntawm 4V lossis 10V tuaj yeem ua tau. Rau PMOS, ntawm qhov tod tes, Vgs tsawg dua li qee tus nqi yuav ua, uas siv rau rooj plaub thaum lub hauv paus rau VCC, piv txwv li, siab kawg tsav. Txawm hais tias PMOS tuaj yeem siv tau yooj yim los ua tus tsav tsheb siab kawg, NMOS feem ntau yog siv rau cov tsav tsheb siab kawg vim muaj kev tiv thaiv siab, tus nqi siab, thiab ob peb hom hloov.

 

Ntxiv rau peb lub luag haujlwm tseem ceeb uas tau hais los saum toj no, MOSFETs kuj tseem tuaj yeem siv los ua qhov sib txawv ntawm cov resistors kom paub qhov voltage-tswj resistors, thiab kuj muaj ntau yam kev siv.