Ndingawubona njani umahluko phakathi kwamandla kunye nobuthathaka beMosfets?

Kukho iindlela ezimbini zokwahlula phakathi kwezinto eziluncedo nezingeloncedo zikaMosfet.

Eyokuqala: ngokomgangatho ukwahlula isiphambuka Mosfet kwinqanaba lombane

I-Multimeter iya kutsalelwa kwi-R × i-100 gear, ipeni ebomvu edibeneyo ngokungaqhelekanga kwi-tube yeenyawo, ipeni elimnyama lixhunywe kwelinye ityhubhu yeenyawo, ukwenzela ukuba unyawo lwesithathu lugcine imeko emisiwe. Ukuba ufumanisa inaliti ine-jitter encinci, ingqina ukuba unyawo lwesithathu lwesango. Ukuba ufumana uqwalaselo olucace ngakumbi lwesiphumo sokwenyani, unokuba kufutshane nokungcangcazela kwe-elektroniki okanye ukubanjwa komnwe okujinga ezinyaweni zomoya, ukubona kuphela ukujikwa kwenaliti, oko kukuthi, ebonisa ukuba ukujinga ezinyaweni zomoya lisango, ezinye iinyawo ezimbini zingumthombo kunye ne-drain, ngokulandelelana.

Ukwahlula isizathu: Ukuchasana kwegalelo kwe-JFET kungaphezulu kwe-100MΩ, kwaye i-transconductance iphezulu kakhulu, xa isango likhokelwa, indawo yangaphakathi yemagnethi ilula kakhulu ukufumanisa isignali yedatha yombane osebenzayo esangweni, ukuze umbhobho uthande ukuba ibe phezulu, okanye ityekele ekubeni i-off. Ukuba i-voltage yokungeniswa komzimba yongezwa kwangoko esangweni, kuba uphazamiseko oluphambili lwe-electromagnetic lunamandla, le meko ingasentla iya kubaluleka ngakumbi. Ukuba inaliti yemitha ijikela kabukhali ukuya ekhohlo, oko kuthetha ukuba umbhobho uthande ukuba phezulu, isixhasi se-RDS somthombo wedreyini siyakhula, kwaye isixa somthombo wamanzi siyancipha i-IDS. Ngokuchaseneyo, inaliti yemitha ijikela kabukhali ukuya ngasekunene, ebonisa ukuba umbhobho uthande ukuba ucimile, i-RDS iyehla, kwaye i-IDS iye phezulu. Nangona kunjalo, elona cala lichanekileyo apho inaliti yemitha ijikiswa khona kufuneka ixhomekeke kwiipali ezilungileyo nezingalunganga zombane owenziweyo (ivoltheji esebenza kakuhle kwicala elisebenza ngayo okanye umva umva wombane wokusebenza) kunye nendawo ephakathi yokusebenza yombhobho.

Okwesibini: ngokomgangatho ukwahlula okulungileyo kunye nokungalunganga kwe-mosfet

Okokuqala sebenzisa i-multimeter R × 10kΩ ibhloko (i-9V efakwe kwi-9V okanye i-15V ibhetri ehlaziywayo), ipeni elibi (elimnyama) eliqhagamshelwe kwisango (G), ipeni elihle (elibomvu) eliqhagamshelwe kumthombo (S). Kwisango, umthombo wentlawulo yebhetri ephakathi, ke inaliti ye-multimeter ine-deflection elula. Emva koko utshintshe kwi-multimeter R × 1Ω ibhloko, ipeni elibi kwi-drain (D), ipeni elihle kumthombo (S), i-multimeter iphawulwe ixabiso ukuba i-ohm embalwa, ibonisa ukuba i-mosfet ilungile.