The circuit in Figure P3.52 is another configuration used to switch an LED on and off. The

Question:

The circuit in Figure P3.52 is another configuration used to switch an LED on and off. The transistor parameters are $V_{T P}=-0.6 \mathrm{~V}, k_{p}^{\prime}=40 \mu \mathrm{A} / \mathrm{V}^{2}$, and $\lambda=0$. The diode cut-in voltage is $V_{\gamma}=1.6 \mathrm{~V}$. Design $R_{D}$ and the transistor width-to-length ratio such that $I_{D}=15 \mathrm{~mA}$ for $V_{I}=0 \mathrm{~V}$ and $V_{S D}=0.20 \mathrm{~V}$.

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