A voltage-follower feedback circuit is shown in Fig. 8.58. For the MOS transistor, I_D= 0.5 mA, k€™ = 180 µA/V², r_o= ˆž, W/L = 100, |Ï•_f| = 0.3 V, and γ = 0.3 V^1/2. For the op amp, assume that R_i=1 MΩ, R_o= 10 kΩ, and a_v= 1,000. Calculate input resistance, output resistance, loop transmission, and closed-loop gain:

(a) Using the formulas from two-port analysis (Section 8.5).

(b) Using the formulas from return-ratio analysis (Section 8.8).

Fig. 8.58:

VDD V Ip V.