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Given hfe = 60, hie=1000Ω, hoe = 20μ Ω^–, hre = 2 * 10^-4. Find the current gain of the BJT, correct up to two decimal points.(a) – 58.44(b) -59.21(c) – 60.10(d) – 60.00This question was posed to me in a job interview.I need to ask this question from Hybrid Equivalent Model in section Transistor Biasing and Low Frequencies of Analog Circuits

Answer»

Correct OPTION is (a) – 58.44

To elaborate: CURRENT gain, AI = – hf/(1 + hoRL’) where RL’ = 2kΩ||4kΩ

RL’ = 1.33kΩ.

Thus AI = – 60/(1 + 0.0266) = -58.4453.



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