× Question 4 In the figure below, transistor Q3 is equivalent to 3 transistors in parallel, each of which is matched to Q4. Assume the following: V*= 5V, V = - 5V, and the output current lo=1.8 mA. For all transistors: Take B=30, Va=infinity. Vee(on)=0.7V What is the value of resistance R1? Choose the answer closest to what you have found! DO NOT ignore the impact of base currents and do not round up numbers on your calculator. V+= SV R₁ 24 0 2x - V-=-SV To 0/11 ...

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Can someone help explain why the answer is 14.27? I do not under the three transistor Current Source.

Question 4
In the figure below, transistor Q3 is equivalent to 3 transistors in parallel, each of which is matched to Q4. Assume the following: V=5V, V = -5V, and the output current lo=1.8 mA. For all transistors: Take B-30, VA-infinity,
VBE(On)=0.7V
What is the value of resistance R1? Choose the answer closest to what you have found! DO NOT ignore the impact of base currents and do not round up numbers on your calculator.
V+=
5V
Hide answer choices
A 5.17k
B 14.35k
с 11.45k
D
E
11.23k
14.27k
24
Q5
8 V-=-5 V
0/11
To
Correct answer
Transcribed Image Text:Question 4 In the figure below, transistor Q3 is equivalent to 3 transistors in parallel, each of which is matched to Q4. Assume the following: V=5V, V = -5V, and the output current lo=1.8 mA. For all transistors: Take B-30, VA-infinity, VBE(On)=0.7V What is the value of resistance R1? Choose the answer closest to what you have found! DO NOT ignore the impact of base currents and do not round up numbers on your calculator. V+= 5V Hide answer choices A 5.17k B 14.35k с 11.45k D E 11.23k 14.27k 24 Q5 8 V-=-5 V 0/11 To Correct answer
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