D 9.114 The two-stage CMOS op amp in Fig. P9.114 is fabricated in a 0.18-μm technology having k1 n = 4k1 p = 400 μA/V2, Vtn −Vtp = 0.4 V. (a) With A and B grounded, perform a dc design that will result in each of Q1:
conducting a drain current of 100 μA and each of Q6:
a current of 200 μA. Design so that all transistors operate at 0.2-V overdrive voltages. Specify the W/L ratio required for each MOSFET. Present your results in tabular form. What
is the dc voltage at the output (ideally)?
(b) Find the input common-mode range.
(c) Find the allowable range of the output voltage.
(d) With vA = vid/2 and vB =−vid /2, find the voltage gain vo/vid . Assume an Early voltage of 6 V.