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During high frequency applications of a B.J.T, which parasitic capacitors arise between the collector and the base?

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During high frequency applications of a B.J.T, which parasitic capacitors arise between the collector and the base?

(a) Cje and Cb

(b) Ccs

(c) Cπ

(d) Cµ

I got this question in an interview for internship.

Question is from Effect of Various Capacitors on Frequency Response in portion Transistor Frequency Response of Analog Circuits

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Correct choice is (d) Cµ

Explanation: Only one capacitor up between the base and the collector. This is due to the depletion region present between the base and the collector region.

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