Kodi ntchito za MOSFET ndi ziti?

Zithunzi za MOSFETamagwiritsidwa ntchito kwambiri. Tsopano mabwalo ena akuluakulu ophatikizika amagwiritsidwa ntchito MOSFET, ntchito yoyambira ndi BJT transistor, ikusintha ndikukulitsa. Kwenikweni BJT triode ingagwiritsidwe ntchito komwe ingagwiritsidwe ntchito, ndipo m'malo ena ntchitoyo ndi yabwino kuposa katatu.

 

Kuchulukitsa kwa MOSFET

MOSFET ndi BJT triode, ngakhale onse semiconductor amplifier chipangizo, koma ubwino kuposa triode, monga kukana mkulu athandizira, gwero chizindikiro pafupifupi palibe panopa, amene amathandiza kukhazikika kwa chizindikiro athandizira. Ndi chida choyenera ngati cholumikizira siteji yolowera, komanso ili ndi zabwino zaphokoso lotsika komanso kukhazikika kwa kutentha. Nthawi zambiri amagwiritsidwa ntchito ngati preamplifier pamabwalo okulitsa mawu. Komabe, chifukwa ndi chipangizo chamakono choyendetsedwa ndi voteji, kukhetsa kwaposachedwa kumayendetsedwa ndi voteji pakati pa gwero la chipata, kukulitsa kocheperako kwa transconductance yotsika nthawi zambiri sikukhala kwakukulu, kotero kuti kuthekera kokulitsa kumakhala kocheperako.

 

Kusintha kwamphamvu kwa MOSFET

MOSFET ntchito ngati lophimba pakompyuta, chifukwa kudalira kokha polyon madutsidwe, palibe monga BJT triode chifukwa m'munsi panopa ndi zotsatira zosungira katundu, kotero kusintha liwiro la MOSFET ndi mofulumira kuposa triode, monga chubu chosinthira. Nthawi zambiri amagwiritsidwa ntchito pazochitika zapamwamba kwambiri, monga kusintha mphamvu zamagetsi zomwe zimagwiritsidwa ntchito mu MOSFET muzochitika zapamwamba kwambiri za ntchitoyo. Poyerekeza ndi ma switch a BJT triode, masiwichi a MOSFET amatha kugwira ntchito pamagetsi ang'onoang'ono ndi mafunde, ndipo ndi osavuta kuphatikiza pa zowotcha za silicon, motero amagwiritsidwa ntchito kwambiri m'mabwalo akuluakulu ophatikizika.

Zomwe muyenera kusamala mukamagwiritsa ntchitoZithunzi za MOSFET?

Ma MOSFET ndi osalimba kwambiri kuposa ma triode ndipo amatha kuonongeka mosavuta ndi kugwiritsa ntchito molakwika, motero ndikofunikira kusamala kwambiri mukamagwiritsa ntchito.

(1) Ndikofunikira kusankha mtundu woyenera wa MOSFET pazochitika zosiyanasiyana zogwiritsira ntchito.

(2) Ma MOSFET, makamaka ma MOSFET a zipata zotsekera, amakhala ndi cholepheretsa cholowera kwambiri, ndipo amayenera kufupikitsidwa ku ma elekitirodi aliwonse osagwiritsidwa ntchito kuti apewe kuwonongeka kwa chubu chifukwa cha chiwongolero cha chipata.

(3) Mphamvu yamagetsi yamagetsi yamagetsi a MOSFET sangathe kusinthidwa, koma imatha kusungidwa pamalo otseguka.

(4) Kuti asunge kutsekereza kwakukulu kwa MOSFET, chubucho chiyenera kutetezedwa ku chinyezi ndikusungidwa mouma pamalo ogwiritsira ntchito.

(5) Zinthu zolipiridwa (monga chitsulo chosungunuka, zida zoyesera, ndi zina zotero) zomwe zimagwirizana ndi MOSFET ziyenera kukhazikitsidwa kuti zisawonongeke chubu. Makamaka pamene kuwotcherera insulated chipata MOSFET, malinga ndi gwero - chipata sequential dongosolo kuwotcherera, ndi bwino kuwotcherera pambuyo mphamvu kuzimitsa. Mphamvu ya chitsulo chosungunulira mpaka 15 ~ 30W ndiyoyenera, nthawi yowotcherera sayenera kupitilira masekondi 10.

(6) insulated chipata MOSFET sangathe kuyesedwa ndi multimeter, akhoza kuyesedwa ndi tester, ndipo pokhapokha kupeza woyesa kuchotsa mawaya yochepa dera maelekitirodi. Mukachotsedwa, ndikofunikira kufupikitsa ma elekitirodi musanachotsedwe kuti mupewe overhang pachipata.

(7) Pogwiritsira ntchitoZithunzi za MOSFETndi magawo a gawo lapansi, magawo a gawo lapansi ayenera kulumikizidwa bwino.