The single-stage op amp in Fig. 9.54 has a nondominant pole p₂with |p₂|=200 Mrad/s. The op amp is in a unity-gain negative feedback loop (f = 1).

(a) If g_m1 = 0.3 mA/V, what value of C_L givesa 45° phase margin? (Assume that the capacitance at the op amp output is dominated by C_L and the op-amp gain a(s) can be modeled as having two poles.)

(b) If I_TAIL = 0.5 mA, what is the output slew rate with this C_L?

Figure 9.54:

VDD M4 V81 MAA V. V82 a M1A in- M2 M1 in+ O TAIL -Vss