Manual engahlawulwayo radio yabasaqalayo: indlela ukukhangela le-FET

FETs - izixhobo semiconductor, apho transients ulawulo, kwakunye ubukhulu imveliso ngoku ngokutshintsha endle yombane. Kukho iindidi ezimbini kwezi zixhobo; kunye nesango igqunyiwe (yena yahlulwe transistors nge eyakhelwe-ngaphakathi kwitshaneli yoqheliso channel) nokulawula nguqu. FETs ngenxa linezalo iimpawu ezizodwa ezisetyenziswa kakhulu nezixhobo zombane: izinto amandla, iiseti umabonwakude, iikhompyutha, njl

Xa nokulungisa izixhobo ngokuqinisekileyo yonke lwabasaqalayo engahlawulwayo irediyo ngalo mbuzo: indlela ukukhangela le-FET? Kwiimeko ezininzi, ukuqinisekiswa izinto ezo nazo xa elungisa izinto ngamandla idaleka. Kweli nqaku ukuchaza ngokweenkcukacha indlela yokwenza kakuhle.

Indlela ukukhangela le ohmmeter FET

Kuqala kwinto zonke, ukuze kuqaliswe kuvavanyo FET, kuyimfuneko ukuba bajongane nayo "pinout", oko kukuthi, kunye nezikhonkwane indawo. Ukuza kuthi ga ngoku, kukho iinguqulelo ezininzi ezahlukeneyo izinto ezinjalo, ngokulandelelana, indawo i electrode kufuneka ezahlukeneyo. Wena uyakwazi ukufumana transistors semiconductor kunye nabo ezisayiniweyo. Zokumakisha ukusebenzisa oonobumba Latin G, D, S. Ukuba Utyikityo akakho, kuyimfuneko ukusebenzisa iincwadi reference.

Ngoko ke, uhlobo ngaphandle ukumakishwa lwabafowunelwa, xoxa ukuba batshekishe indlela FET. Inyathelo elilandelayo ukuthatha amanyathelo okhuseleko ayimfuneko, ngenxa yokuba izixhobo endle ethe kakhulu umbane emile, kunye nokuthintela ukusilela into enjalo, kuyimfuneko ukuba amalungiselelo emhlabeni. Ukuze sithulwe intlawulo static ezingasetyenziswanga, ngokuqhelekileyo isemzimbeni esihlahleni anti-ndawonye umtya emhlabeni.

Asimele silibale ukuba ufuna ukugcina FETs iziphetho ezivaliweyo. Ukususa umbane engatshintshiyo, uyakwazi ukuqhubeka ukuqinisekisa le nkqubo. Oku kuya kufuna ukuba imitha elula Ohm. Xa element isebenziseke phakathi zonke izigqibo yenkcaso kufuneka uye Infinity, kodwa kukho ezinye ngaphandle. Ngoku sijonga ukujonga indlela isiphumo intsimi transistor of n-hlobo.

Sisebenzisa isixhobo entle probe electrode kwesango (G), kwaye uphenyo elibi ukuba uqhagamshelane umthombo (S). Kweli nqanaba, iqala ukungakuhlawulisi capacitance esangweni kunye element ivula. Xa ukulinganisa ukuxhathisa phakathi imvelaphi kunye idreyini (D) ohmmeter ukubonisa amanye ixabiso ukumelana. Iindidi ezahlukeneyo transistors, eli xabiso eyahlukileyo. Ukuba short-wesekethe kwiitheminali transistor, umlo phakathi nakumsele yemvelaphi uza kuphinda ithambekele yokungapheli. Ukuba ayiwenzi, oko kuthetha ukuba transistor esixengayo.

Ukuba ucela ukuba batshekishe indlela P-uhlobo FET, impendulo ilula: phinda le nkqubo ilapha ngasentla iyatshintsha kuphela ezichaseneyo. Asimele silibale ukuba amandla FET mihla phakathi imvelaphi idreyini babe diode umzimba, ngokulandelelana, "prozvanivatsya" ulwalathiso kuyo elinye kuphela.

Hlola multimeter FET

Xa phambi isixhobo "DMM", ungakwazi ukukhangela le-FET. Ukuze wenze oku, siya esichengeni imitha ku "ukuqhubeka" ilight imo singenise yasendle imo kufumaneka bantu. Ukuba N-uhlobo transistor, phenyo thabatha ezingabambi nakumsele ezakhayo - shutter. transistor ezineziphene kwimeko enjalo kuvulwa. Thina udlulisela uphenyo plus ngaphandle kokuthatha thabatha, emthonjeni, kwaye multimeter ubonisa ixabiso ukumelana. Emva koko off transistor: ngaphandle nokuphakamisa ngosiba evela kumthombo, thabatha bachukumise shutter uze ubuyele idreyini. iibhloko Transistor kunye nokumelana kuyaphela yokungapheli.

amateurs abaninzi zikanomathotholo wabuza: "njani khangela na FET, hayi vypaivaya" Ngoko nangoko baphendule ngaloo ndlela akukho ekhulwini ikhulu. Ukuze wenze oku, sebenzisa i ibhloko multimeter ka HFE, kodwa le ndlela rhoqo akaphumeleli, yaye uyakwazi ukuchitha ixesha elininzi ziphanzile.