R₁ R₂ www Vcc M Rc RE
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Question
It is required to design the bias circuit of Fig. 7.52 for a BJT whose nominal β=100.
(a) Find the largest ratio (RB/RE) that will guarantee IE remains within ±5% of its nominal value for β as low as 50 and as high as 150 .
Transcribed Image Text:R₁
R₂
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Fig. 7.52
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RE
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Step 1: Given:
VIEWStep 2: Reducing the circuit:
VIEWStep 3: Finding emitter currents for low high rage of beta:
VIEWStep 4: For IE remains within ±5% :
VIEWStep 5: Finding the largest ratio (RB/RE) :
VIEWStep 6: Finding IE for nominal and High range:
VIEWStep 7: Finding IE for low range:
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