Chapter 11, Problem 11.39P

Consider the circuit shown in Figure P 11.39 . The circuit and transistor parameters are $V^{+}=+3$ V, $V^{-}=-3$ V, $R_D=360\text{k}\Omega ,I_Q=12\mu \text{A}$ $V_{TP}=-0.4\text{V},K_p=30\mu \text{A}/{\text{V}}^2,$ and $\lambda =0.$ The output resistance of the current source is $R_o=4\text{M}\Omega .$ (a) Determine the $Q$ -points of the transistors for $v_1=v_2=0.$ (b) Determine the differential- and common-mode voltage gains for (i) $v_O=v_{D1}-v_{D2}$ and (ii) $v_O=v_{D2}$ .