Consider the circuit in Figure P2.28. Let (V_{gamma}=0). The secondary voltage is given by (v_{s}=V_{s} sin omega

Question:

Consider the circuit in Figure P2.28. Let $V_{\gamma}=0$. The secondary voltage is given by $v_{s}=V_{s} \sin \omega t$, where $V_{s}=24 \mathrm{~V}$. The Zener diode has parameters $V_{Z}=16 \mathrm{~V}$ at $I_{Z}=40 \mathrm{~mA}$ and $r_{z}=2 \Omega$. Determine $R_{i}$ such that the load current can vary over the range $40 \leq I_{L} \leq 400 \mathrm{~mA}$ with $I_{Z}(\mathrm{~min})=40 \mathrm{~mA}$ and find $C$ such that the ripple voltage is no larger than $1 \mathrm{~V}$.

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