Problem #1
11.57. An NMOS source follower must drive a load
resistance of 100 with a voltage gain of 0.8. If $I_D = 1$ mA,
$\mu_n C_{ox} = 100 \frac{\mu A}{V^2}$, $C_{ox} = 12 \frac{fF}{\mu m^2}$, and $L = 0.18 \mu m$, what
is the minimum input capacitance that can be achieved?
Assume $\lambda = 0$, $C_{GD} \approx 0$, $C_{SB} \approx 0$, and $C_{GS} = (2/3)WLC_{ox}$.