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Which of the following configuration classes has the lowest second order harmonics?

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Which of the following configuration classes has the lowest second order harmonics?

(a) Class A

(b) Class AB

(c) Class B

(d) Class C

This question was addressed to me during an online interview.

The origin of the question is Second Harmonic Distortion in division Large Signal Amplifiers of Electronic Devices & Circuits

1 Answer

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Right answer is (a) Class A

Easy explanation: Class A configuration has the highest linearity due to which is produces the least amount of distortion, which in turn produces even lower second order harmonic distortion. It is then followed by Class AB, Class B and Class C.

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