GATE EE 2021 Set 1 — Question 33
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Analog & Digital Electronics → Amplifiers & Feedback → BJT & FET Biasing
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Question
In the BJT circuit shown, beta of the PNP transistor is 100. Assume V. The voltage across will be V when is ______ k. (Round off to 2 decimal places.)
Correct answer
16.7 to 17.7
Solution
Given: , V (so V), V, k, k, k, V.
k.
1.Calculate collector current: mA.
2.Calculate emitter current: mA.
3.Calculate emitter voltage: V.
4.Calculate base voltage: V.
5.Base current mA. In a PNP transistor, flows out of the base.
6.Using Thevenin's theorem at the base: , .
k.
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