HH_2_4 - The resistor R C protects the transistor by...

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Problem HH 2.4 In problem HH 2.3 you designed a simple regulated power supply using a zener. It has some practical problems: V out is not adjustable zener diodes give only a moderate ripple rejection and regulation against changes of input load and for widely varying load currents a high power zener is necessary. By using an emitter follower to isolate the zener you get the improved circuit below.
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Unformatted text preview: The resistor R C protects the transistor by limiting maximum output current. Design a +10 volt supply with the same specifications as in Problem HH 2.3. Use a zener and emitter follower. Calculate worst-case dissipation in transistor and zener. What is the percentage change in zener current from the no-load condition to full load? Compare with your previous circuit....
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