阿摩線上測驗
23 圖示電路，若電晶體 β=100，VBE(on)=0.7 V，電流 IC約為若干 mA？
(A) 0.2
(B)0.4
(C)0.7
(D)1.3
答案：登入後查看
統計： A(6), B(14), C(202), D(62), E(0) #1329652
統計： A(6), B(14), C(202), D(62), E(0) #1329652
詳解 (共 6 筆)
我愛阿摩，阿摩愛我2
#2233099
Vb = 10 * 100K / (100K+400K) = 2V
Rb = 400K//100K = 80K
Ib * B = Ic Ie/Ib = r r =1+B
Ic = Vb-Vbe / Rb+(1+B)*Re * B
Ic = 2-0.7 / 80K+(1+100)*1K * 100
= 1.3 / 181K *100
= 0.72mA
4
0
pianista2202
#2264651
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