Using the BJT small-signal model given in Figure 2, determine the AC current gain A = iout/in for the circuit given in Figure 3. Assume r. >> Tn. You may assume that B is large. Igut Q1 lin Bi, Q2 E...

Extracted text: Using the BJT small-signal model given in Figure 2, determine the AC current gain A = iout/in for the circuit given in Figure 3. Assume r. >> Tn. You may assume that B is large. Igut Q1 lin Bi, Q2 E Figure 2 Figure 3


Extracted text: Consider a two-BJT configuration in Figure 1. You may assume that both transistors are the same with the same B, VBE,on = 0.7 V, and VcE,EOS = 0.3 V BO VE VBE Q2 E 1 a. Determine the minimum voltage VBE that will turn ON both Q1 and Q2. b. Determine the minimum voltage VcE before either transistor operates in saturation. c. Derive the DC current gain A, = I/Ig in terms of B for the two-transistor circuit. You may assume that Bis large.