Consider the circuit shown in Fig. 4.81, where Is1 = 31s2 = 5 10-6 A,...

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Consider the circuit shown in Fig. 4.81, where Is1 = 31s2 = 5 × 10-¹6 A, B₁ = 100, B₂ = 50, VA = ∞, and Rc = 500 $2. (a) We wish to forward-bias the collector- base junction of Q₂ 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 Q₁ and 22 and construct the equivalent circuit. Consider the circuit shown in Fig. 4.81, where Is1 = 31s2 = 5 × 10-¹6 A, B₁ = 100, B₂ = 50, VA = ∞, and Rc = 500 $2. (a) We wish to forward-bias the collector- base junction of Q₂ 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 Q₁ and 22 and construct the equivalent circuit.

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