Answer - 1-1 1-2a5V b0 1-3 (1)UF=0 I=9mA I1=I2=4.5mA (2)...

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《《《《 《《《《《《《《《 1-1 《《《《《 1-2《a《《5V 《b《0 1-3 (1)U F =0 I=9mA I 1 =I 2 =4.5mA (2) U F =0 I=I 2 =9mA I 1 =0 (3)U F =3V I=6mA I 1 =I 2 =3mA 1-4 20 《《1.25μA 《《80μA 1-5 《 1-6 《《《U A 《U B 1-9 《《《《《《《《《《 I=0.303mA,《《±10《《《 《《 - + % 30 % 30 1-11 (a)12V (b)1.4V (c)3V (d)7.7V (e)5V 1-13 V 1 :NPN 《《——C ——E ——B V 2 :NPN 《《——B ——E ——C V 3 : PNP 《《——C ——E ——B 1-14 I CEO =10μA U CBO =45V P CM =45mW β=50 1-15 1-16 《《 《《 1-17 (a)《《 (b)《《 (c)《《 (d)《《 (e)《《 (f)《《 1-18 A 《《 B 《《 C 《《 2-1 《《 《《 《《 2-2 《1《《《 《《 R B 《2《《《 《《 R B 2-3 《1《R B =250.8KΩ 《2《456 KΩ 《3《R B 《《《《《《《《《《《《 U BE =U CC =12V《《《《 R B 《《《《《《《《《 ' B R 《4《《《《《 2-4 50μA 2mA 6V (3)U C1 =0.7V, U C2 =6V (5)《72
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Answer - 1-1 1-2a5V b0 1-3 (1)UF=0 I=9mA I1=I2=4.5mA (2)...

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