Ndingaziva sei mutsauko pakati pesimba reMosfets uye kusasimba?

Pane nzira mbiri dzekusiyanisa pakati peMosfet zvakanakira nekuipira.

Yekutanga: qualitatively kusiyanisa junction Mosfet yemagetsi level

Multimeter ichadanwa kuR × 100 giya, peni dzvuku zvakabatana netsoka chubhu, peni dema yakabatana kune imwe tsoka chubhu, kuitira kuti tsoka yechitatu ichengetedze yakaturikwa mamiriro. Kana iwe ukawana tsono ine jitter shoma, inoratidza kuti tsoka yechitatu yegedhi. Kana iwe ukawana zvakanyanya kucherechedzwa kwemhedzisiro chaiyo, iwe unogona zvakare kuve padyo nemagetsi vibration kana chigunwe chigunwe chakarembera mumhepo tsoka, kungoona kutsauka kwetsono, kureva, zvichiratidza kuti kurembera mumhepo tsoka ndiro gedhi, mamwe makumbo maviri ndiwo tsime uye mvura, zvichiteerana.

Siyanisa chikonzero: Kupokana kweJFET kunopfuura 100MΩ, uye transconductance yakakwira zvakanyanya, kana gedhi richitungamirwa, nzvimbo yemukati magineti iri nyore kuona iyo inoshanda voltage data chiratidzo pagedhi, kuitira kuti pombi iite. kuva kusvika, kana kuti kunenge kuri ku-off. Kana iyo induction voltage yemuviri inokurumidza kuwedzerwa kugedhi, nekuti kiyi yemagetsi kupindira kwakasimba, mamiriro ari pamusoro achanyanya kukosha. Kana tsono yemamita ikatsauka zvakanyanya kuruboshwe, zvinoreva kuti pombi inenge yasvika, iyo drain-sosi resistor RDS inowedzera, uye huwandu hwekudonhedza-source ikozvino hunodzikira IDS. Sezvineiwo, tsono yemamita inotsvedza zvakanyanya kurudyi, zvichiratidza kuti pombi inenge iri-yakadzimwa, RDS inodzika, uye IDS inokwira. Nekudaro, kwakananga kwainochinjirwa tsono yemamita kunofanirwa kuenderana neakanaka uye asina kunaka matanda eiyo induced voltage (yakanaka nzira inoshanda voltage kana reverse gwara rekushanda voltage) uye yepakati inoshanda yepombi.

Chechipiri: zvine hunhu kusiyanisa zvakanakira uye zvakaipira zve mosfet

Kutanga shandisa multimeter R × 10kΩ block (yakaiswa 9V kana 15V rechargeable bhatiri), iyo inegetive peni (dema) yakabatana negedhi (G), iyo yakanaka peni (tsvuku) yakabatana kune kwainosuka (S). Kugedhi, kunobva bhatiri yepakati bhatiri, ipapo iyo multimeter tsono ine zvinyoro zvinyoro. Zvadaro shandura kune multimeter R × 1Ω block, peni isina kunaka kune dhirairi (D), peni yakanaka kune chitubu (S), iyo multimeter yakanyorwa kukosha kana mashoma ohm, inoratidza kuti mosfet yakanaka.