Lub luag haujlwm ntawm MOSFETs hauv circuits

MOSFETsua lub luag haujlwmnyob rau hauv switching circuitsyog tswj lub Circuit Court rau thiab tawm thiab teeb liab hloov dua siab tshiab.MOSFETs tuaj yeem muab faib ua ob pawg: N-channel thiab P-channel.

Hauv N-channelMOSFETCircuit Court, BEEP tus pin yog siab kom pab tau cov lus teb buzzer, thiab qis kom tua lub buzzer.P-channelMOSFETlos tswj lub GPS module fais fab mov rau thiab tawm, GPS_PWR tus pin qis thaum nyob, GPS module yog ib txwm fais fab mov, thiab siab ua kom lub GPS module fais fab tuag.

P-channelMOSFETnyob rau hauv N-hom silicon substrate ntawm thaj av P + muaj ob: ntws thiab qhov chaw. Ob tug ncej no tsis muaj hluav taws xob rau ib leeg, thaum muaj qhov zoo txaus ntxiv rau qhov chaw thaum hauv av, N-hom silicon nto hauv qab lub rooj vag yuav tshwm sim raws li P-type inverse txheej, mus rau hauv ib qho kev sib txuas ntawm cov dej ntws thiab qhov chaw. . Hloov qhov hluav taws xob ntawm lub rooj vag hloov qhov ceev ntawm qhov hauv cov channel, yog li hloov cov channel tsis kam. Qhov no yog hu ua P-channel txhim kho thaj tsam cuam tshuam transistor.

NMOS cov yam ntxwv, Vgs ntev npaum li ntau dua ib qho nqi yuav nyob rau, muaj feem xyuam rau qhov chaw hauv av qis-kawg tsav rooj plaub, muab lub rooj vag voltage ntawm 4V lossis 10V ntawm kab.

Cov yam ntxwv ntawm PMOS, tsis sib xws rau NMOS, yuav tig rau ntev npaum li Vgs tsawg dua li qee tus nqi, thiab nws yog qhov tsim nyog rau kev siv nyob rau hauv cov ntaub ntawv siab kawg tsav thaum lub hauv paus txuas nrog VCC. Txawm li cas los xij, vim muaj ntau hom kev hloov pauv me me, muaj kev tiv thaiv siab thiab tus nqi siab, txawm hais tias PMOS tuaj yeem siv tau yooj yim heev thaum tsav high-end, yog li hauv high-end tsav, feem ntau tseem siv NMOS.

Zuag qhia tag nrho,MOSFETsmuaj cov input impedance siab, pab txhawb kev sib txuas ncaj qha hauv circuits, thiab kuj yooj yim rau fabricate rau hauv loj-scale integrated circuits.