What minimum steady state voltage Vin is required to turn the LED on and keep the transistor fully saturated? Assume that the forward bias voltage for the LED is 2 V and there is a 0.2 V collector-to-emitter voltage drop when the transistor is saturated.

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter27: Single-phase Transformers
Section: Chapter Questions
Problem 6PP: ES480VIPNS275turnsRatioESISNS525turnsZ=1.2k
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What minimum steady state voltage Vin is required to turn the LED on and keep the transistor fully saturated? Assume that the forward bias voltage for the LED is 2 V and there is a 0.2 V collector-to-emitter voltage drop when the transistor is saturated.

Vino
LED
SV
ㅎ
330 2
Transcribed Image Text:Vino LED SV ㅎ 330 2
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Where did VBE come from if it was not given in the problem? How do you compute that value if it's not given?

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