Chapter 4, Problem 4.37P

Consider the source follower circuit in Figure P4.37 with transistor parameters $V_{TN}=0.8\text{V}$ , ${k^{\prime }}_n=100\mu {\text{A/V}}^{\text{2}}$ , $W/L=20$ , and $\lambda =0.02{\text{V}}^{-1}$ . (a) Let $I_Q=5\mu \text{A}$ . (i) Determine the small−signal voltage gain. (ii) Find the output resistance $R_o$ . (b) Repeat part (a) for $I_Q=2\mu \text{A}$ .

Figure P4.37