If d.c. unregulated input is 20 V, V_{0} = 10 V, load current is 0–20 mA, design the regulator, assume for the Zener, I_{z(min)} = 10 mA, I_{z(max)} = 100 mA.
If d.c. unregulated input is 20 V, V_{0} = 10 V, load current is 0–20 mA, design the regulator, assume for the Zener, I_{z(min)} = 10 mA, I_{z(max)} = 100 mA.