In the three-stage amplifier of Fig. 12.124, (W/L)1-7 = 20 μm/ 0.18 μm.
(a) Determine the phase margin.
(b) Place a capacitor between nodes X and Y so as to obtain a phase margin of 60°. What is the unity-gain bandwidth under this condition?
(c) Repeat (b) if the compensation capacitor is tied between X and ground and compare the results.
