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试题名称:脉冲电路一、图1所示电路中,设晶体管 BG_1～BG_8的β=40,V_(ces)≈0,V_(bes)≈0,D_1～D_4均为理想二极管。画出图中 A、B、C、D、E 点的脉冲波形,并指出脉冲宽度、周期和幅度。(15分)二、根据图2所示逻辑图,写出其表达式 L;用卡诺图化简并画出相应的逻辑图。(5分)三、已知电路(图3a)及其输入波形(图3b),画出输出波形,并标明幅值和指数变化部分的τ值。(10分)四、设图4电路中各触发器的初始状态为 Q_A=
Title: pulse circuit A circuit shown in Figure 1, set the transistor BG_1 ~ BG_8 β = 40, V_ (ces) ≈ 0, V bes ≈ 0, D_1 ~ D_4 are ideal diode. Draw the pulse waveform of point A, B, C, D, E in the picture, and point out the pulse width, period and amplitude. (15 points) Second, according to the logic diagram shown in Figure 2, write its expression L; Karnaugh map simplification and draw the corresponding logic diagram. (5 points) Third, the known circuit (Figure 3a) and its input waveform (Figure 3b), draw the output waveform, and indicate the amplitude and exponential changes in the value of τ. (10 points) Fourth, set the initial state of the flip-flop in Figure 4 circuit Q_A =