Jizzax davlat pedagogika instituti fizika va texnologik ta’lim fakulteti

Oʻlchovlar misoli 1-jadval: Kirish tavsiflari IB = f(UBE) 2-jadval: Nazorat tavsiflari IC = f(IB); UCE = 5 V 3-jadval: Chiqish tavsiflari IC = f(UCE), IB = 4,6 mA

Baholash natijalari
Kirish tavsiflari: I_B = f(U_BE)

p-n bazani emitterga oʻtishi chegaraviy kuchlanishi taxminan 0,6V boʻlgan diod sifatida namoyon boʻladi.

Nazorat tavsiflari: I_C = f(I_B), U_CE = 5V

Izoh: Tokning kuchayishi quyidagi bilan tavsiflanadi . BD 137 tranzistori uchun ß = 40 ... 250 tashkil qiladi.
Chiqish tavsiflari: I_C = f(U_CE), I_B = 4,6 mA

Izoh: Quvvatning asosiy yoʻqotishlari kollektor-emitterning oʻtishlari bilan bogʻliq: P = U_CE ∙ I_C. BD 137 tranzistori uchun maksimal quvvat yoʻqotishlari 8VA tashkil qiladi.
Sinov savollari:
1.Bipolar tranzistor (Bt) nima?
2. Bipolar tranzistorning ishlash prinsipi nimaga asoslangan?
3. Bipolar tranzistorlarda kollektor, emitter va bazalarning vazifasi nimadan iborat?
4. n-p-n va p-n-p tuzilmali BTlarning ishlash prinsipida farq bormi?
5. Bipolar tranzistorning qanday ulanish sxemalarini bilasiz?
6. BTning asosiy ish rejimlarini aytib bering.
7. Turli ulanish sxemalaridagi BT statik xarakteristikalaridan aktiv va to‘yinish rejimi sohalarini aniqlang.
8. Tranzistorning tok bo‘yicha uzatish koeffitsiyenti nima? U_B va U_E ulanish sxemalaridagi tok bo‘yicha uzatish koeffitsiyenti kattaliklarini solishtiring. 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