The circuit shown ensures a constant current of 100 mA is delivered to the load even if the load conditions are changing. The Zener breakdown voltage is 5 V. Determine the value of R needed. Assume the transistor is Silicon and that V+ is large enough to cause the Zener to go into breakdown and to prevent the transistor from going into saturation. Assume further that the collector and emitter currents are approximately equal.
The circuit shown ensures a constant current of 100 mA is delivered to the load even if the load conditions are changing. The Zener breakdown voltage is 5 V. Determine the value of R needed. Assume the transistor is Silicon and that V+ is large enough to cause the Zener to go into breakdown and to prevent the transistor from going into saturation. Assume further that the collector and emitter currents are approximately equal.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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The circuit shown ensures a constant current of 100 mA is delivered to the load even if the load conditions are changing. The Zener breakdown voltage is 5 V. Determine the value of R needed. Assume the transistor is Silicon and that V+ is large enough to cause the Zener to go into breakdown and to prevent the transistor from going into saturation. Assume further that the collector and emitter currents are approximately equal.
Transcribed Image Text:V+
R
Vz A
1 kΩ
Load
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