Kuzindikiritsa ndi kuyesa koyambira kwa MOSFET

1.Junction MOSFET pini chizindikiritso

Chipata chaMOSFET ndi maziko a transistor, ndi kukhetsa ndi gwero ndi osonkhanitsa ndi emitter watransistor yofananira. The multimeter to R × 1k gear, ndi zolembera ziwiri kuyeza kutsogolo ndi m'mbuyo kukana pakati pa zikhomo ziwiri. Pamene mapini awiri kutsogolo kukana = kutsutsa kumbuyo = KΩ, ndiko kuti, zikhomo ziwiri za gwero S ndi kukhetsa D, pini yotsalayo ndi chipata G. Ngati ndi 4-pinnjira MOSFET, mtengo wina ndi wogwiritsa ntchito chishango chokhazikika.

Chizindikiritso cha MOSFET ndi kuyezetsa 拷贝

2.Tsimikizirani chipata　

Ndi cholembera chakuda cha multimeter kukhudza MOSFET electrode mwachisawawa, cholembera chofiira kukhudza maelekitirodi ena awiri. Ngati kukana konsekonse kuli kochepa, kusonyeza kuti onsewo ndi abwino kukana, chubucho ndi cha N-channel MOSFET, cholembera chakuda chofanana ndi chipata.

Njira yopanga yasankha kuti kukhetsa ndi gwero la MOSFET ndizofanana, ndipo zimatha kusinthanitsa wina ndi mnzake, ndipo sizingakhudze kugwiritsa ntchito dera, dera limakhalanso lachilendo panthawiyi, kotero palibe chifukwa chopita. kusiyanitsa kwambiri. Kukaniza pakati pa kukhetsa ndi gwero kuli pafupifupi ma ohms zikwi zingapo. Simungagwiritse ntchito njira iyi kuti mudziwe chipata cha chipata cha insulated MOSFET. Chifukwa kukana kwa kulowetsedwa kwa MOSFET iyi ndikokwera kwambiri, ndipo mphamvu yapakati pa polar pakati pa chipata ndi gwero ndi yaying'ono kwambiri, kuyeza kwa mtengo wocheperako kumatha kupangidwa pamwamba pa polar. mphamvu yamagetsi apamwamba kwambiri, MOSFET idzakhala yosavuta kuwononga.

Chizindikiritso cha MOSFET ndi kuyesa (1)

3.Kuyerekeza kuthekera kokulitsa kwa ma MOSFET

Pamene multimeter yakhazikitsidwa ku R × 100, gwiritsani ntchito cholembera chofiira kuti mugwirizane ndi gwero S, ndipo gwiritsani ntchito cholembera chakuda kuti mugwirizane ndi kukhetsa D, zomwe zili ngati kuwonjezera mphamvu ya 1.5V ku MOSFET. Panthawi imeneyi singano imasonyeza kukana mtengo pakati pa DS pole. Panthawiyi ndi chala kutsina chipata G, mphamvu yamagetsi ya thupi ngati chizindikiro cholowera pachipata. Chifukwa cha gawo la kukulitsa kwa MOSFET, ID ndi UDS zidzasintha, kutanthauza kuti kukana pakati pa DS pole kwasintha, titha kuwona kuti singano ili ndi matalikidwe akulu akugwedezeka. Ngati dzanja likutsina chipata, kugwedezeka kwa singano kumakhala kochepa kwambiri, ndiko kuti, mphamvu yokulitsa ya MOSFET imakhala yofooka; ngati singano ilibe kanthu kakang'ono, kusonyeza kuti MOSFET yawonongeka.