Kodi mfundo ya ntchito ya MOSFET ndi chiyani?

MOSFET (FieldEffect Transistor abbreviation (FET)) mutuMOSFET. ndi ochepa onyamulira kutenga nawo mbali mu matenthedwe madutsidwe, amatchedwanso Mipikisano pole mphambano transistor. Imagawidwa m'magulu amagetsi oyendetsedwa ndi semi-superconductor. Kukaniza komwe kulipo ndikwambiri (10 ^ 8 ~ 10 ^ 9 Ω), phokoso lochepa, kugwiritsa ntchito mphamvu zochepa, kusinthasintha kwapang'onopang'ono, kosavuta kuphatikiza, palibe vuto lachiwiri losweka, ntchito ya inshuwaransi ya nyanja yayikulu ndi zabwino zina, tsopano zasintha bipolar junction transistor ndi mphamvu mphambano transistor wa ogwirizana amphamvu.

Makhalidwe a MOSFET

Choyamba: MOSFET ndi voteji mastering chipangizo, kudzera VGS (chipata source voteji) kuti adziwe ID (kukhetsa DC);

Chachiwiri:Zithunzi za MOSFETlipoti la DC ndi laling'ono kwambiri, kotero kukana kwake kotulutsa ndi kwakukulu kwambiri.

Chachitatu: chimagwiritsidwa ntchito zonyamulira zochepa kuti zichititse kutentha, ndipo motero zimakhala ndi muyeso wabwino kwambiri wokhazikika;

Chachinayi: imakhala ndi njira yochepetsera yochepetsera magetsi amagetsi ang'onoang'ono kuti akhale ang'onoang'ono kusiyana ndi transistor imakhala ndi njira yochepetsera ya kuchepetsa magetsi a coefficients ang'onoang'ono;

Chachisanu: MOSFET anti-radiation mphamvu;

Zisanu ndi chimodzi: chifukwa palibe ntchito yolakwika ya kubalalitsidwa kwapang'ono komwe kumachitika chifukwa cha phokoso lobalalika, chifukwa phokosolo ndi lochepa.

MOSFET ntchito mfundo

MOSFETntchito mfundo mu chiganizo chimodzi, ndiye, "kukhetsa - gwero kuyenda kudzera njira pakati pa ID, ndi elekitirodi ndi njira pakati pn anamanga mu n'zosiyana kukondera electrode voteji kuti adziwe ID". Zolondola kwambiri, matalikidwe a ID kudutsa dera, ndiko kuti, gawo lodutsa njira, ndikusintha kosagwirizana ndi pn junction, kupezeka kwa kusanjikiza kocheperako kukulitsa kusinthika kwaukadaulo wa chifukwa. M'nyanja yosadzaza ya VGS = 0, kukulitsa kwa gawo losinthika sikuli kwakukulu kwambiri chifukwa, malinga ndi mphamvu ya maginito ya VDS yowonjezeredwa pakati pa gwero, ma elekitironi ena m'nyanjayi amakokedwa ndi kukhetsa. , mwachitsanzo, pali ntchito ya ID ya DC kuchokera kukhetsa kupita kugwero. Wosanjikiza wocheperako womwe ukukulirakulira kuchokera pachipata kupita ku drain upanga mtundu wa blockage wa thupi lonse la tchanelo, ID yodzaza. Onani chitsanzo ichi ngati kutsina. Izi zikuyimira kuti gawo losinthira limalepheretsa njira yonse, ndipo sikuti DC idadulidwa.

Mu kusintha wosanjikiza, chifukwa palibe kudzikonda kayendedwe ka ma elekitironi ndi mabowo, mu mawonekedwe enieni insulating makhalidwe kukhalapo ambiri DC panopa n'zovuta kusuntha. Komabe, mphamvu ya maginito pakati pa kuda - gwero, mchitidwe, awiri kusintha wosanjikiza kukhudzana kuda ndi chipata mzati m'munsi kumanzere, chifukwa kutengeka maginito amakoka ma elekitironi mkulu-liwiro kudzera wosanjikiza kusintha. Chifukwa mphamvu ya maginito osunthika sisintha kudzaza kwa mawonekedwe a ID. Kachiwiri, VGS ku malo oipa kusintha, kotero kuti VGS = VGS (kuchoka), ndiye kusintha wosanjikiza kwambiri kusintha mawonekedwe kuphimba nyanja yonse. Ndipo maginito a VDS amawonjezedwa ku gawo la kusintha, mphamvu ya maginito yomwe imakoka electron kumalo oyendetsa, bola ngati pafupi ndi gwero lachifupi kwambiri chonse, chomwe chiri choposa mphamvu ya DC. wokhoza kuima.