Consider the JFET diff-amp shown in Figure P11.56. The transistor parameters are: \(I_{D S S}=0.8 \mathrm{~mA}, \lambda=0\), and \(V_{P}=-2 \mathrm{~V}\).

(a) Determine \(I_{S}\), \(I_{D 1}, I_{D 2}\), and \(v_{o 2}\) for \(v_{1}=v_{2}=0\).

(b) Using the small-signal equivalent circuit, determine the differential-mode voltage gain \(A_{d}=v_{o 2} / v_{d}\), the common-mode voltage gain \(A_{c m}=v_{o} / v_{c m}\), and the \(\mathrm{CMRR}_{\mathrm{dB}}\).

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V+=5V RD=ID 25 RD= 25 802 Q Q2 12 - = 20 Rs V-=-5 V Figure P11.56