In the two-transistor NMOS current source shown in Figure 10.16, the parameters are: \(V^{+}=3 \mathrm{~V}, V^{-}=-3 \mathrm{~V}\), and \(I_{\mathrm{REF}}=0.2 \mathrm{~mA}\). The transistor parameters are: \(V_{T N 1}=0.4 \mathrm{~V}, K_{n 1}=0.2 \mathrm{~mA} / \mathrm{V}^{2}\), and \(\lambda_{1}=\lambda_{2}=0\).

(a) If \(V_{T N 2}=0.4 \mathrm{~V}\) and \(K_{n 2}=(0.2 \pm 5 \%) \mathrm{mA} / \mathrm{V}^{2}\), determine the range in values of \(I_{O}\).

(b) If \(K_{n 2}=0.2 \mathrm{~mA} / \mathrm{V}^{2}\) and \(V_{T N 2}=(0.4 \pm 5 \%) \mathrm{V}\), determine the range in values of \(I_{O}\).

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IREF V+ Ro ID2=10 + VDSI M M2 VDS2 + VGS V- Figure 10.16 Basic two-transistor MOSFET current source