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Which effect plays a critical role in producing changes in the frequency response of the B.J.T.?

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Which effect plays a critical role in producing changes in the frequency response of the B.J.T.?

(a) Thevenin’s effect

(b) Miller effect

(c) Tellegen’s effect

(d) Norton’s effect

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Asked question is from Effect of Various Capacitors on Frequency Response in section Transistor Frequency Response of Analog Circuits

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The correct option is (a) Thevenin’s effect

Explanation: The miller effect results in a change in the capacitance seen between the base and the collector. This is why it affects the frequency response of the B.J.T. deeply by changing the poles and affecting the high frequency voltage gain stage.

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