GATE EE 2024 Set 1 — Question 42
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Analog & Digital Electronics → Amplifiers & Feedback → BJT & FET Biasing
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Question
A BJT biasing circuit is shown in the figure, where V and . The Quiescent Point values of and are respectively
Correct answer
(A) 4.6 V and 2.46 mA
Solution
Given:
V
V
Thevenin resistance .
We know .
.
.
Rounding to one decimal place, .Thus, the quiescent point values are V and mA.The final answer is .
V
V
1.Calculate Thevenin equivalent at the base:
Thevenin voltage .Thevenin resistance .
2.Calculate base current ():
Apply KVL to the base-emitter loop:We know .
.
3.Calculate collector current ():
.4.Calculate emitter current ():
.5.Calculate collector-emitter voltage ():
Apply KVL to the collector-emitter loop:.
Rounding to one decimal place, .Thus, the quiescent point values are V and mA.The final answer is .
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