8.84 Consider the Wilson current-mirror circuit of Fig. 8.37(a) when supplied with a reference current IREF of 0.2 mA. Find the output resistance Ro. What is the change in IO corresponding to a change of +1 V in the voltage at the collector of Q3? Give both the absolute value and the percentage change. Let β = 100 and VA = 20 V.
5 MΩ; +0.2 µA; +0.1%