The transistor parameters for the circuit in Figure P11.105 are: \(K_{n}=\) \(0.2 \mathrm{~mA} / \mathrm{V}^{2}, V_{T N}=0.8 \mathrm{~V}\), and \(\lambda=0\). The output resistance of the constant-current source is \(R_{o}=100 \mathrm{k} \Omega\).

(a) For \(v_{1}=v_{2}=0\), design the circuit such that: \(v_{o 2}=2 \mathrm{~V}, v_{o 3}=3 \mathrm{~V}, v_{o}=0, I_{D Q 3}=0.25 \mathrm{~mA}\), and \(I_{D Q 4}=2 \mathrm{~mA}\).

(b) Determine the differential-mode gains \(A_{d 1}=v_{o 2} / v_{d}\) and \(A_{d}=v_{o} / v_{d}\).

(c) Determine the common-mode voltage gains \(A_{c m 1}=\) \(v_{o 2} / v_{c m}\) and \(A_{c m}=v_{o} / v_{c m}\), and the overall \(\mathrm{CMRR}_{\mathrm{dB}}\).

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www R 102 ww R V=5 V IDQ3 103 www M3 RD Ma IDQ4 R$2 M M R$1 +1 = 0.5 mA V=-5 V Figure P11.105 V=-5 V