GATE EE 2017 Set 2 — Question 37
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Analog & Digital Electronics → Amplifiers & Feedback → BJT & FET Biasing
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Question
For the circuit shown in the figure below, it is given that . The transistor has and when the B-E junction is forward biased.
For this circuit, the value of is

Correct answer
(D) 129
Solution
Given and .
From the circuit, the current through the resistor is .
Applying KVL to the output loop:
.
Thus, .
The collector voltage is .
The base voltage is .
The base current is .
We also know .
Substituting :
.
Since , we have .
From the circuit, the current through the resistor is .
Applying KVL to the output loop:
.
Thus, .
The collector voltage is .
The base voltage is .
The base current is .
We also know .
Substituting :
.
Since , we have .
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