Repeat Problem 4.15 if the source resistor is bypassed by a source capacitor \(C_{S}\).

Data From Problem 4.15:-

For the NMOS common-source amplifier in Figure P4.15, the transistor parameters are: \(V_{T N}=0.8 \mathrm{~V}, K_{n}=1 \mathrm{~mA} / \mathrm{V}^{2}\), and \(\lambda=0\). The circuit parameters are \(V_{D D}=5 \mathrm{~V}, R_{S}=1 \mathrm{k} \Omega, R_{D}=4 \mathrm{k} \Omega, R_{1}=225 \mathrm{k} \Omega\), and \(R_{2}=175 \mathrm{k} \Omega\).

(a) Calculate the quiescent values \(I_{D Q}\) and \(V_{D S Q}\).

(b) Determine the small-signal voltage gain for \(R_{L}=\infty\).

(c) Determine the value of \(R_{L}\) that will reduce the small-signal voltage gain to 75 percent of the value found in part (b).

Rin Ca Figure P4.15 VDD Rp CC2 R ww R ww RL - V