solution

EXERCISE 7.10 In this exercise you will perform a large signal analysis of the BJT amplifier shown in Figure 7.72. Assume that the BJT is characterized by the large signal model from Exercise 7.8. Assume further that Vs = 5 V, RL 10 ks, Rj = 500 ks2, and ß = 100. = a) Write an expression relating vo to v?. b) What is the lowest value of the input voltage v? for which the BJT operates in its active region? What are the corresponding values of iß, ic, and vo? c) What is the highest value of the input voltage vj for which the BJT operates in its active region? What are the corresponding values of iß, ic, and vo? d) Sketch a graph of vo versus ví for the four parameter values given. Vs RL VO ?? W Ri B + B E TIE Vi FIGURE 7.72 C + 0.4V + ic ? Big Big VCE + 0.6V ” VBE ip E (b)