8.2 For VDD = 1.2 V and using IREF = 10 µA, it is required to design the circuit of Fig. 8.1 to obtain an output current whose nominal value is 60 µA. Find R and W2 if Q1 and Q2 have equal channel lengths of 0.4 µm, W1 = 1 µm, Vt = 0.4 V, and What is the lowest possible value of VO? Assuming that for this process technology, the Early voltage find the output resistance of the current source. Also, find the change in output current resulting from a +0.2-V change in VO.
66 kΩ; 6 μm; 0.2 V; 40 kΩ; +5 μA