A MOSFET current gain amplifier is shown in Figure P12.47. The transistor parameters are \(K_{n}=K_{p}=10 \mathrm{~mA} / \mathrm{V}^{2}, V_{T N}=1 \mathrm{~V}, V_{T P}=-1 \mathrm{~V}\), and \(\lambda_{n}=\lambda_{p}=0\). The LED turn-on voltage is \(V_{\gamma}=1.6 \mathrm{~V}\). Assume the LED small-signal resistance is \(r_{f}=0\).

(a) Determine the quiescent currents \(I_{D Q 1}\) and \(I_{D Q 2}\).

(b) Determine the small-signal current gain \(A_{i}=I_{o} / I_{i}\).

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M VG=7.6 V Figure P12.47 V+ = 10 V RD=525 2 www M2 www Rp=500 2 LED = 16 mA