Question: Consider the circuit shown in Fig. 4.81, where Is1 = 31s2 = 5 10-6 A, B = 100, B = 50, VA = ,

Consider the circuit shown in Fig. 4.81, where Is1 = 31s2 =

Consider the circuit shown in Fig. 4.81, where Is1 = 31s2 = 5 10-6 A, B = 100, B = 50, VA = , and Rc = 500 $2. (a) We wish to forward-bias the collector- base junction of Q by no more than 200 mV. What is the maximum allow- able value of Vin? (b) With the value found in (a), calculate the small-signal parameters of Q and 22 and construct the equivalent circuit.

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