Chapter 11, Problem 11.56P

Consider the JFET diff-amp shown in Figure P11.56. The transistor parameters are: $I_{DSS}=0.8\text{mA},\lambda =0,$ and $V_P=-2\text{V}.$ (a) Determine $I_S$ $I_{D1},I_{D2},$ and $v_{o2}$ for $v_1=v_2=0.$ (b) Using the small-signal equivalent circuit, determine the differential-mode voltage gain $A_d=v_{o2}/v_d,$ the common-mode voltage gain $A_{cm}=v_o/v_{cm},$ and the CMRR ${}_{dB}$ .