The circuit in Fig. P4.17 is referred to as an “active inductor.” a. Find an expression for the small-signal input impedance as a function of frequency in terms of the circuit parameters , , , etc....

The circuit in Fig. P4.17 is referred to as an “active inductor.”

a. Find an expression for the small-signal input impedance as a function of frequency in terms of the circuit parameters , , , etc. assuming .

b. Over what range of frequencies is well modeled by an inductor?

c. What is the value of the effective inductance in terms of the circuit parameters?