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For the bias circuit shown, what is the value of R in Ohms that is needed to set Ibias equal to 128.1μA? Assume that the emitter area of Q2 is 9 times the emitter area of Q1, and the emitter area of Q3 is 4 times the emitter area of Q4. Use Vt = kT/q = 26mV. Neglect all base currents and the effect of base- VDD width modulation. Q3 Q1 Q4 Q2 R Ibias

For the bias circuit shown, what is the value of R in Ohms that is needed to set Ibias equal to 128.1μA? Assume that the emitter area of Q2 is 9 times the emitter area of Q1, and the emitter area of Q3 is 4 times the emitter area of Q4. Use Vt = kT/q = 26mV. Neglect all base currents and the effect of base- VDD width modulation. Q3 Q1 Q4 Q2 R Ibias

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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For the bias circuit shown, what is the value of R in Ohms that is needed to set Ibias equal to 128.1μA? Assume that the emitter area of Q2 is 9 times the emitter area of Q1, and the emitter area of Q3 is 4 times the emitter area of Q4. Use Vt = kT/q = 26mV. Neglect all base currents and the effect of base- VDD width modulation. Answer: 23 Q3 Q1 X The correct answer is: 727.33 Q4 Q2 R 20 Ibias
Transcribed Image Text:For the bias circuit shown, what is the value of R in Ohms that is needed to set Ibias equal to 128.1μA? Assume that the emitter area of Q2 is 9 times the emitter area of Q1, and the emitter area of Q3 is 4 times the emitter area of Q4. Use Vt = kT/q = 26mV. Neglect all base currents and the effect of base- VDD width modulation. Answer: 23 Q3 Q1 X The correct answer is: 727.33 Q4 Q2 R 20 Ibias
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