Let the FETs of the basic mirror of have k2 5 4k1 5 2 mA/V2 , Vt 0 5 0.4 V and 5 1y(15 V). (a) If iI 5 50 A, obtain an expression for iO as a function of vO. Hence, fi nd vI , Ri , Ro, and vO(min),...

Let the FETs of the basic mirror of have k2 5 4k1 5 2 mA/V2 , Vt 0 5 0.4 V and 5 1y(15 V). (a) If iI 5 50 A, obtain an expression for iO as a function of vO. Hence, fi nd vI , Ri , Ro, and vO(min), the lower limit of the linear output range. What is the percentage change in iO for each 1-V change in vO above vO(min)? (b) Repeat, but after adding a second FET pair M3-M4 to turn the circuit into a cascode mirror of type. Assume k4 5 k2 5 4k3 5 4k1 5 2 mA/V2 , 5 0.5 V1y2 , and u2 pu 5 0.6 V. Compare with part (a), and comment.