O’zbekiston respublikasi oliy va o’rta maxsus ta’lim vazirligi buxoro davlat universiteti magistratura bo’limi Qo’lyozma huquqida udk: sharopov farrux qobilovich harorat ta’sirida maydon tranzistorining elektro-fizik parametrlari

12-rasm. Turli haroratlarda kollektor-baza o'tishining yopilish rejimida tokning kuchlanishga bog'liqligi

Xususan, bunday toklarda haroratning oshishi bilan kuchlanishning kamayishi chiziqli bo'ladi, bu esa uning haroratni o'lchash parametri sifatida qo'llanilishini tasdiqlaydi.
Kollektor-baza p-n-o'tishning yopilish rejimida berilagan haroratda kuchlanishining oshishi bilan tok o'zgarmaydi (12-rasm), haroratning oshishi bilan esa tokning harorat koeffitsiyenti oshishi tok qiymatini chiziqli ravishda kattalashtiradi: (3.14)
Demak, kollektorning teskari tokini ham o'lchov parametri sifatida ishlatish mumkin.

1 –30 °С, 2 –50 °С.
13-rasm. Ikki qutbli ulash rejimida (-)p-n-p (+) suzuvchi (erkin) bazali kollektorli o'tishning yopilishida tokning kuchlanishga bog'liqligi
13-rasmda (-)p-n-p+(+)- struktura ishchi tokining ortishini tokning o'tkazish koeffitsenti kollektor-emitter kuchlanishiga bog'liqligi va harorat ortishi bilan kattalashishi orqali tushuntirish mumkin, bu esa tashuvchilarning kollektorli o'tishida generatsiyalanadigan miqdori oshishi bilan izohlanadi.
Bunda emitterli o'tishning qarshiligi haroratning ta'siriga, kollek-torli o'tishning qarshiligi esa yopilish kuchlanishiga sezgirroq bo'ladi. Shuning uchun (-)p-n-p+(+)-strukturali tranzistor ikki qutbli rejimda ulanishida alohida olingan dioddan yuqori harorat sezgirlikka va kichik ishchi tokka ega bo'ladi. Bunday datchiklar aviatsiya, avtomobilь va boshqa ishlab chiqarish sohalarida qo'llanilishi jihatidan ahamiyatga ega.
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