The transistor parameters in the circuit in Figure P4.68 are the same as those given in Problem 4.68. The circuit parameters are \(V_{D D}=3.3 \mathrm{~V}\), \(R_{S 1}=1 \mathrm{k} \Omega\), and \(R_{\mathrm{in}}=250 \mathrm{k} \Omega\).

(a) Design the circuit such that \(I_{D Q 1}=0.1 \mathrm{~mA}, I_{D Q 2}=0.25 \mathrm{~mA}, V_{D S Q 1}=1.2 \mathrm{~V}\), and \(V_{S D Q 2}=1.8 \mathrm{~V}\).

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

Data From Problem 4.68:-

The transistor parameters in the circuit in Figure P4.68 are \(V_{T N 1}=0.6 \mathrm{~V}\), \(V_{T P 2}=-0.6 \mathrm{~V}, K_{n 1}=0.2 \mathrm{~mA} / \mathrm{V}^{2}, K_{p 2}=1.0 \mathrm{~mA} / \mathrm{V}^{2}\), and \(\lambda_{1}=\lambda_{2}=0\). The circuit parameters are \(V_{D D}=5 \mathrm{~V}\) and \(R_{\mathrm{in}}=400 \mathrm{k} \Omega\).

(a) Design the circuit such that \(I_{D Q 1}=0.2 \mathrm{~mA}, I_{D Q 2}=0.5 \mathrm{~mA}, V_{D S Q 1}=2 \mathrm{~V}\), and \(V_{S D Q 2}=3 \mathrm{~V}\). The voltage across \(R_{S 1}\) is to be \(0.6 \mathrm{~V}\).

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

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