Komponantai na Yanzu a Transistor

Takaitaccen Mafi Yawan Karamin Transistor

Mafi yawan karamin transistor sun hada da mafi yanayi (IE), mafi yanayi na bace, da mafi yanayi na cikin tashar.

A transistor NPN, mafi yanayi ta faruwa saboda elektron, amma a transistor PNP, ta faruwa saboda hawalibba, wanda ya ba da tsari masu mafi yanayi. A bincika mafi yawan karamin transistor PNP da takaitaccen bace. Tashar-bace (JE) ta shafi ne, amma tashar-ciki (JC) ta shafi gaba. Raisu ya nuna duka mafi yawan karamin da suka haɗa.

Na sani, mafi yanayi ta faruwa a transistor karkashin tasha, wanda ake kira mafi yanayi na tasha (IE). Wannan mafi yanayi ana jin da duwu – Mafi yanayi na hawalibba (IhE) da Mafi yanayi na elektron (IeE). IeE ta faruwa saboda elektron da ke faruwar da tasha zuwa bace, amma IhE ta faruwa saboda hawalibba da ke faruwar da tasha zuwa bace.

A transistor industrial, tasha ta yi ƙarin dogon ɗaya da bace, wanda ya ba mafi yanayi na elektron ɗaya ga ƙarin da mafi yanayi na hawalibba. Saboda haka, duk mafi yanayi na tasha ta faruwa saboda hawalibba da ke faruwar da tasha zuwa bace.

Babu ɗaya daga cikin hawalibba da ke faruwar da tashar JE (tashar tasha) ta ƙoƙarin da elektron da ke cikin bace (N-type). Saboda haka, babu ɗaya daga cikin hawalibba da ke faruwar da JE zai tafara zuwa JC. Hawalibban da suka baki za faruwar da tashar ciki wanda ya ba mafi yanayi na hawalibba (IhC). Zai faruwar da ƙungiyoyi a bace, amma mafi yanayi da ke faruwar da bace zai

Elektron a bace da suka rasa saboda ƙungiyoyi da hawalibban da ke faruwar da JE an jiye su da elektron da ke faruwar da biyu. Hawalibban da suka faruwar da tashar ciki (JC) za faruwar da ƙasa ciki.

Idan ci gaba ta tashar tasha ta faruwa, kuma IE = 0 da IhC = 0. A wannan halin, bace da ciki za su iya yi aiki a matsayin diod da a shafi gaba. A wannan lokacin, mafi yanayi na ciki, IC zai kasancewa mafi yanayi na shafi gaba (ICO ko ICBO).

ICO ita ce mafi yanayi mai ƙarin da ke faruwar da diod PN junction. Wannan ya faruwa saboda minority carriers da ake samu saboda haraji. Mafi yanayin da ke faruwar da wannan za ƙara; idan tashar ta shafi gaba, kuma za ƙunshi tsarin mafi yanayi na ciki. Mafi yanayin da ke faruwar da wannan za samu ma'ana mai ƙarin (I0) a lokacin da ake bayyana shafi gaba da ƙarin.

Idan tashar tasha ta faruwa (a yankin aiki na active), mafi yanayi na ciki zai

Alpha ita ce large signal current gain wanda ya faruwa saboda tsarin mafi yanayi na tasha wanda ake kira IhC.

A transistor PNP, mafi yanayi na shafi gaba (ICBO) za kasancewa mafi yanayi da ke faruwar da hawalibba da ke faruwar da tashar ciki daga bace zuwa ƙasa (IhCO) da mafi yanayi da ke faruwar da elektron da ke faruwar da tashar ciki a ƙasar (IeCO).

Duk mafi yanayi da ke faruwar da transistor zai kasancewa duk mafi yanayi da ke faruwar da transistor (daidai Kirchhoff’s current law).

Abubuwan Da Sune Mafi Yawan Karamin

DC Current gain (αdc):Wannan zai iya ƙara da DC current gain na transistor na common base. Wannan zai daɗe da ƙarfin daɗi, amma zai ƙarin da ɗaya.

Small Signal Current Gain (αac):Idan mafi yanayi na ciki-bace (VCB) ta daɗi. Wannan zai daɗe da ƙarfin daɗi, amma zai ƙarin da ɗaya.