The parameters of the transistors in the circuit in Figure P4.56 are \(V_{T N D}=\) \(-1 \mathrm{~V}, K_{n D}=0.5 \mathrm{~mA} / \mathrm{V}^{2}\) for transistor \(M_{D}\), and \(V_{T N L}=+1 \mathrm{~V}, K_{n L}=\) \(30 \mu \mathrm{A} / \mathrm{V}^{2}\) for transistor \(M_{L}\). Assume \(\lambda=0\) for both transistors.

(a) Calculate the quiescent drain current \(I_{D Q}\) and the dc value of the output voltage.

(b) Determine the small-signal voltage gain \(A_{v}=v_{o} / v_{i}\) about the \(Q\)-point.