大工-数字电路方面与系统(王洪玉)-习题答案- 第2讲.pdf

2 2.1 2. 1(a) 2. 1(b)A B F 1 F6 2.1 : 2.2 2.2 T? F F 1 6 1 2.2 : (a) 10V Ibs= =0.2mA 50 ∗103 6 0.7 V − V ib= =0. 106mA 50 ∗103 i I T b bs 1 -3 3 F =E -i R =10V-500.10610 10 1 C C C =10V-5.3V=4.7V (b) 5V Ibs= =0.083mA 20 ∗3 ∗103 5 0.7 V − V ib= =0.43mA 10 ∗103 i I T F ≈0 b bs 2 2 (c) E C 15V Ibs= = =0.25mA βRC