Consider the circuit of Fig. 13.33 for the case designed in Exercise 13.37, namely, I =
Chapter 13, Problem 13.77(choose chapter or problem)
Consider the circuit of Fig. 13.33 for the case designed in Exercise 13.37, namely, I = 10 A, IS2/IS1 = 2, R2 = 1.73 k, R3 = R4 = 20 k. Augment the circuit with npn transistors Q5 and Q6 with emitters connected to ground and bases connected to VBIAS1, to generate constant currents of 10 A and 40 A, respectively. What should the emitter areas of Q5 and Q6 be relative to that of Q1? What value of a resistance R6 will, when connected in the emitter of Q6, reduce the current generated by Q6 to 10 A? Assuming that the VBIAS1 line has a low incremental resistance to ground, find the output resistance of current source Q5 and of current source Q6 with R6 connected. Ignore base currents.
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