Suppose the BJTs of the folded cascode of have 02 5 50, and VA2 5 30 V. (a) If IBIAS 5 2 mA, ILOAD 5 1 mA, and VBE1 has been adjusted so as to bias the output node at 0 V dc, fi nd Ri , Ro, a1, a2,...

Suppose the BJTs of the folded cascode of have 02 5 50, and VA2 5 30 V. (a) If IBIAS 5 2 mA, ILOAD 5 1 mA, and VBE1 has been adjusted so as to bias the output node at 0 V dc, fi nd Ri , Ro, a1, a2, and aoc. (b) Assuming VEC2(on) 5 0.7 V and VEC2(sat) 5 0.2 V, specify VB2 so that vO(max) 5 2.5 V. Hence, fi nd the maximum input-signal amplitude such that both constraints uvbe2u # 5 mV and uvou # 2.5 V are met. (c) Repeat part (a) if IBIAS 5 1.5 mA, ILOAD 5 1 mA, and VBE1 is readjusted so as to bias the output node still at 0 V dc. (d) Repeat (a) if IBIAS 5 1.5 mA, ILOAD 5 0.5 mA, and VBE1 is once again readjusted so as to bias the output node still at 0 V dc. Compare and comment.