Response to the following problem:
A zener shunt regulator employs a 9.1-V zener diode for which VZ = 9.1 V at IZ = 9 mA, with rz = 40 Ω and IZK = 0.5 mA. The available supply voltage of 15 V can vary as much as ±10%. For this diode, what is the value of VZ0? For a nominal load resistance RL of 1 kΩ and a nominal zener current of 10 mA,what current must flow in the supply resistor R? For the nominal value of supply voltage, select a value for resistor R, specified to one significant digit, to provide at least that current.
What nominal output voltage results? For a ± 10% change in the supply voltage, what variation in output voltage results?
If the load current is reduced by 50%, what increase in VO results?
What is the smallest value of load resistance that can be tolerated while maintaining regulation when the supply voltage is low?
What is the lowest possible output voltage that results?
Calculate values for the line regulation and for the load regulation for this circuit using the numerical results obtained in this problem.