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

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

(a) No capacitor arises

(b) Ccs

(c) Cb

(d) Ccs and Cb

The question was asked in my homework.

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

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The correct choice is (a) No capacitor arises

The best I can explain: The emitter and the collector are far away from each other when the B.J.T. is being constructed. Hence, we find that they don’t share a common junction where charges can accumulate. Thus, no such parasitic capacitors appear.

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