9.114 The two-stage CMOS op amp in Fig. P9.114 is fabricated in a 0.18-μm technology having kn = 4kp = 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, Q2, Q3, and Q4 conducting a drain current of 100 μA and each of Q6 and Q7 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 v o/vid. Assume an Early voltage of 6 V.

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