Consider the compound-transistor class AB output stage
Chapter 11, Problem 11.43(choose chapter or problem)
Consider the compound-transistor class AB output stage shown in Fig. 11.33 in which Q2 and Q4 are matched transistors with VBE = 0.7 V at 10 mA and = 100, Q1 and Q5 have VBE = 0.7 V at 1-mA currents and = 100, and Q3 has VEB = 0.7 V at a 1-mA current and = 10. Design the circuit for a quiescent current of 2 mA in Q2 and Q4, IBIAS that is 100 times the standby base current in Q1, and a current in Q5 that is nine times that in the associated resistors. Find the values of the input voltage required to produce outputs of 10 V for a 1-k load. Use VCC of 15 V.
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