D 13.19 A two-stage CMOS op amp similar to that in Fig. 13.1 is found to have a capacitance between the output node and ground of 0.7 pF. If it is desired to have a unity-gain bandwidth ft of 100 MHz with a phase margin of 72° in a unity-gain configuration, what must gm6 be set to? If |VOV,6| = 0.2 V, what is the bias current ID6? Assume that a resistance R is connected in series with the frequency-compensation capacitor CC and adjusted to place the transmission zero at infinity. What value should R have? If the first stage is operated at |VOV,1| = 0.15 V, what is the value of slew rate obtained? If the first-stage bias current I = 100 µA, what is the required value of CC?
D 13.19 A two-stage CMOS op amp similar to that in Fig. 13.1 is found to have a capacitance between the output node and ground of 0.7 pF. If it is desired to have a unity-gain bandwidth ft of 100 MHz with a phase margin of 72° in a unity-gain configuration, what must gm6 be set to? If |VOV,6| = 0.2 V, what is the bias current ID6? Assume that a resistance R is connected in series with the frequency-compensation capacitor CC and adjusted to place the transmission zero at infinity. What value should R have? If the first stage is operated at |VOV,1| = 0.15 V, what is the value of slew rate obtained? If the first-stage bias current I = 100 µA, what is the required value of CC?
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