Kodi ndingadziwe bwanji kusiyana pakati pa mphamvu ndi zofooka za Mosfets?

Pali njira ziwiri zosiyanitsira zabwino ndi zovuta za Mosfet.

Choyamba: qualitatively kusiyanitsa mphambano Mosfet magetsi mlingo

Multimeter idzayimbidwa ku R × 100 gear, cholembera chofiira mwachisawawa chikugwirizana ndi chubu cha phazi, cholembera chakuda chikugwirizana ndi chubu lina la phazi, kuti phazi lachitatu likhalebe ndi boma loyimitsidwa. Mukapeza singano ili ndi jitter pang'ono, zimatsimikizira kuti phazi lachitatu lachipata. Ngati mupeza mawonekedwe owoneka bwino a zotsatira zenizeni, mutha kukhalanso pafupi ndi kugwedezeka kwamagetsi kapena kukhudza chala kumapazi akumapazi, kungowona kupatuka kwa singano, ndiko kuwonetsa kuti kupachikidwa pamapazi amlengalenga ndi chipata, mapazi ena awiri ndi gwero ndi kukhetsa, motero.

Kusiyanitsa chifukwa: JFET athandizira kukana ndi kuposa 100MΩ, ndi transconductance ndi mkulu kwambiri, pamene chipata anatsogolera, m'nyumba danga maginito n'zosavuta kuzindikira ntchito voteji deta chizindikiro pachipata, kotero kuti payipi amakonda kukhala, kapena kukhala otopa. Ngati mphamvu yamagetsi yamagetsi iwonjezedwa pachipata, chifukwa cholumikizira chachikulu chamagetsi ndi champhamvu, zomwe zili pamwambapa zikhala zofunika kwambiri. Ngati singano ya mita yapatuka kwambiri kumanzere, zikutanthauza kuti payipi imakhala yokwera, chotchinga cha RDS chimakula, ndipo kuchuluka kwa gwero la madzi kumachepetsa IDS. Mosiyana ndi zimenezi, singano ya mita imakhotera kwambiri kumanja, kusonyeza kuti payipi imakhala yozimitsa, RDS imatsika, ndipo IDS imakwera. Komabe, komwe singano ya mita imapatukira iyenera kudalira mizati yabwino komanso yoyipa ya voteji yomwe imapangitsa (voltage yoyenda bwino kapena voliyumu yobwerera kumbuyo) komanso pakatikati pa payipi.

Chachiwiri: qualitatively kusiyanitsa ubwino ndi kuipa kwa mosfet

Choyamba ntchito multimeter R × 10kΩ chipika (ophatikizidwa 9V kapena 15V rechargeable batire), cholembera negative (wakuda) olumikizidwa kwa chipata (G), cholembera zabwino (zofiira) olumikizidwa kwa gwero (S). Ku chipata, gwero la batire yapakati, ndiye singano ya multimeter imakhala ndi kupotoza pang'ono. Kenako sinthani ku multimeter R × 1Ω chipika, cholembera choyipa kukhetsa (D), cholembera chabwino kupita ku gwero (S), ma multimeter odziwika ngati ohm ochepa, zikuwonetsa kuti mosfet ndiyabwino.