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How many methods of coupling are used for a high frequency response of differential amplifier?

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How many methods of coupling are used for a high frequency response of differential amplifier?

(a) 3

(b) 4

(c) 2

(d) 5

The question was posed to me by my school teacher while I was bunking the class.

Enquiry is from High Frequency Response of the Differential Amplifiers in chapter Frequency Response of Electronic Devices & Circuits

1 Answer

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Right option is (b) 4

To explain I would say: There are four types of coupling mechanisms used. They are Resistance-capacitance coupling, thermal coupling, impedance coupling and transformer coupling. Resistance-capacitance coupling is the most vastly used mechanism.

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