Pehea wau e ʻike ai i ka ʻokoʻa ma waena o ka ikaika a me nā nāwaliwali o Mosfets?

ʻElua ala e hoʻokaʻawale ai ma waena o nā pono a me nā hemahema o Mosfet.

ʻO ka mua: hoʻokaʻawale maikaʻi i ka pae uila Mosfet hui

E hoʻopaʻa ʻia ka multimeter i ka R × 100 gear, ʻo ka peni ʻulaʻula i hoʻopili ʻia i kahi paipu wāwae, ua hoʻopili ʻia ka peni ʻeleʻele i kahi paipu wāwae ʻē aʻe, no laila ke kolu o ka wāwae e mālama i ka mokuʻāina hoʻomaha. Inā 'oe e 'ike i ka nila he liʻiliʻi jitter, e hōʻoia i ke kolu o ka wawae no ka puka. Inā loaʻa iā ʻoe ka nānā ʻana i ka hopena maoli, hiki iā ʻoe ke kokoke i ka uila uila a i ʻole ka manamana lima e kau ana i nā wāwae ea, e ʻike wale i ka deflection o ka nila, ʻo ia hoʻi, e hōʻike ana e kau ana i nā wāwae ea ka puka. ʻo nā kapuaʻi ʻelua ʻē aʻe ke kumu a me ke kahawai.

ʻO nā ikaika a me nā nāwaliwali o Mosfet

E hoʻokaʻawale i ke kumu: ʻoi aku ka nui o ke kūpaʻa hoʻokomo o JFET ma mua o 100MΩ, a ʻoi aku ka kiʻekiʻe o ka transconductance, i ka wā e alakaʻi ʻia ai ka ʻīpuka, ua maʻalahi ka maʻalahi o ka māla o loko e ʻike i ka hōʻailona ʻikepili uila hana ma ka ʻīpuka, no laila ke ʻano nei ka pipeline. e pili ana, a i ʻole e hoʻopau. Inā hoʻohui koke ʻia ka volta induction o ke kino i ka puka, no ka mea he ikaika ka hoʻopili electromagnetic kī, ʻoi aku ka nui o ke kūlana ma luna. Inā ʻoi aku ka liʻiliʻi o ka nila mika i ka hema, ʻo ia ke ʻano o ka pipeline e piʻi i luna, hoʻonui ʻia ka RDS resistor punawai wai, a ʻo ka nui o ka wai puna wai e hoʻemi i ka IDS. ʻO ka mea ʻē aʻe, ʻoi aku ka neʻe ʻana o ka nila mika i ka ʻākau, e hōʻike ana i ka hele ʻana o ka paipu, iho ka RDS, a piʻi ka IDS. Eia nō naʻe, ʻo ke kuhikuhi pololei i hoʻohuli ʻia ai ka nila mika e hilinaʻi ʻia ma nā pou maikaʻi a maikaʻi ʻole o ka volta i hoʻokomo ʻia (ka uila hana maikaʻi a i ʻole ka hoʻohuli ʻana i ka uila hana) a me ka waena hana o ka pipeline.

ʻO ka lua: e hoʻokaʻawale maikaʻi i nā pono a me nā hemahema o ka mosfet

E hoʻohana mua i ka multimeter R × 10kΩ poloka (hoʻokomo ʻia ʻo 9V a i ʻole 15V rechargeable pākaukau), ka peni maikaʻi ʻole (ʻeleʻele) pili i ka puka (G), ka peni maikaʻi (ʻulaʻula) pili i ke kumu (S). I ka ʻīpuka, ke kumu o ka hoʻopaʻa ʻana o ka pākaukau waena, a laila ʻoi aku ka haʻahaʻa o ka nila multimeter. A laila e hoʻololi i ka multimeter R × 1Ω poloka, ka peni ʻino i ke kahawai (D), ka peni maikaʻi i ke kumu (S), ka helu multimeter i kaha ʻia inā he mau ohm, e hōʻike ana i ka maikaʻi o ka mosfet.