IFE 60 k2 Qs 44 k2 30 k2 -5.2 V

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 22RQ
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The current source for a current switch is implemented
with a transistor and three resistors, as shown.
What is the current IEE? What is the
minimum permissible value of VREF if transistor QS
is to remain in the forward-active region? Assume
that βF is large.

IFE
60 k2
Qs
44 k2
30 k2
-5.2 V
Transcribed Image Text:IFE 60 k2 Qs 44 k2 30 k2 -5.2 V
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