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1 某雙極性接面電晶體放大電路中,已知電晶體工作於作用區,且其α= 0.98,基極電流IB = 0.04 mA,則射極電流為多少? 95 統測
A 0.1mA
B 2mA
C 3.8mA
D 5mA
β=0.981-0.98=49,IE=(1+49)×0.04m=2mA