Consider the design of the class AB amplifier of Fig.

Chapter 11, Problem 11.55

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Consider the design of the class AB amplifier of Fig. 11.44 under the following conditions: Cox = 200 is high, IQN = IQP = IR = 10 mA, IBIAS = 100 A, R2 = R4, the temperature coefficient of VBE = 2 mV/C, and the temperature coefficient of Vt = 3 mV/C in the low-current region. Find the values of R, R1, R2, R3, and R4. Assume Q6, QP, and QN to be thermally coupled. (RG, used to suppress parisitic oscillation at high frequency, is usually 100 or so.)

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