Dab tsi yog qhov txawv ntawm MOSFETs thiab Triodes thaum siv los ua cov keyboards?

MOSFET thiab Triode yog cov khoom siv hluav taws xob ntau heev, ob qho tib si siv tau los ua hluav taws xob hloov hluav taws xob, tab sis kuj muaj ntau zaus los pauv kev siv cov keyboards, xws li kev hloov mus siv,MOSFETthiab Triode muaj ntau qhov sib xws, kuj tseem muaj qhov sib txawv, yog li ob qho yuav tsum xaiv li cas?

Triode muaj NPN hom thiab PNP hom.MOSFET kuj muaj N-channel thiab P-channel.Qhov peb pins ntawm MOSFET yog rooj vag G, ntws D thiab qhov chaw S, thiab peb pins ntawm Triode yog puag B, collector C thiab emitter E. Dab tsi yog qhov txawv ntawm MOSFET thiab Triode?

N-MOSFET thiab NPN Triode siv los hloov txoj cai

(1) Ntau hom tswj

Triode yog tam sim no-hom tswj Cheebtsam, thiab MOSFET yog ib tug voltage tswj Cheebtsam, Triode nyob rau hauv lub input voltage qhov yuav tsum tau ntawm tus tswj sab yog tsis tshua muaj, feem ntau 0.4V rau 0.6V los yog ntau tshaj tuaj yeem paub Triode ntawm, los ntawm kev hloov lub hauv paus txwv. tam sim no resistor tuaj yeem hloov lub hauv paus tam sim no. MOSFET yog voltage-tswj, qhov voltage yuav tsum tau rau conduction feem ntau yog hais txog 4V mus rau 10V, thiab thaum saturation mus txog, qhov yuav tsum tau voltage yog hais txog 6V rau 10V. Nyob rau hauv kev tswj ntawm qhov qis voltage zaus, kev siv dav dav ntawm Triode li kev hloov pauv, lossis Triode raws li kev tswj tsis tau MOSFET, xws li microcontrollers, DSP, PowerPC thiab lwm yam processors I / O chaw nres nkoj voltage kuj tsawg, tsuas yog 3.3V lossis 2.5V. , feem ntau yuav tsis ncaj qha tswj lubMOSFET, qhov qis voltage, MOSFET tsis tuaj yeem ua rau kev ua haujlwm lossis kev ua haujlwm sab hauv ntawm cov khoom siv loj hauv qhov no, Triode tswj feem ntau yog siv.

(2) Txawv input impedance

Triode lub input impedance yog me me, MOSFET lub input impedance yog loj, lub junction capacitance yog txawv, Triode lub hlws ris capacitance yog loj dua lub MOSFET, qhov kev txiav txim raws li nyob rau hauv lub MOSFET kom ceev tshaj lub Triode;MOSFETnyob rau hauv stability ntawm qhov zoo dua, yog ib tug multi conductor, me suab nrov, thermal stability yog zoo dua.

MOSFET qhov kev tiv thaiv sab hauv me me heev, thiab Triode qhov kev poob qis hauv lub xeev yuav luag tas li, nyob rau lub sijhawm tam sim no me me, feem ntau siv Triode, thiab siv MOSFET txawm tias qhov kev tiv thaiv sab hauv me me, tab sis tam sim no loj, qhov poob qis kuj tseem muaj. loj heev.