Chapter 4, Problem 4.38P

For the source−follower circuit shown in Figure P4.37, the transistor parameters are: $V_{TN}\text{=1V}$ , ${k^{\prime }}_n=60\mu {\text{A/V}}^{\text{2}}$ , and $\lambda =0$ . The small−signal voltage gain is to be $A_{\upsilon }={\upsilon }_o/{\upsilon }_i=0.95$ . (a) Determine the required width−to−length ratio (W/L) for $I_Q=4\text{mA}$ . (b) Determine the required $I_Q$ if $\left(W/L\right)=60$ .