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3) Consider the Zener-diode voltage regulator shown below.
Suppose you design this circuit to drive (supply) a load resistance RL.
The supply voltages to the op-amp are +15 V and -15 V (not shown).
a) What is Vout?
b) If R = 1 k N, what is the smallest R, that the circuit can handle
without "sagging" the output voltage?
c) What should be the power rating of the resistor R? Be explicit about
your assumptions.
+15 V •
R
Vout
1N4738

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