In the 741 op–amp output stage in Figure 13.3, the combination of Q18, Q19, and R10 is replaced by two series diodes with Is = 10-14 A. The transistor parameters are: βn = 200, βp = 50, and VA = 50 V. Assume the same dc bias currents calculated previously. Calculate the output resistance, assuming Q14 is conducting, producing a load current of 5 mA.
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