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Which of the following amplifier class have the highest linearity and lowest distortion?

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Which of the following amplifier class have the highest linearity and lowest distortion?

(a) Class A

(b) Class B

(c) Class C

(d) Class B push-pull

This question was posed to me at a job interview.

My enquiry is from Comparison of Amplifier Classes in section Power Amplifier of Analog Circuits

1 Answer

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Best answer
Correct choice is (a) Class A

The explanation is: Class A amplifier has the highest linearity and the lowest distortion. The amplifying element is always conducting and close to the linear portion of its transconductance curve. The point where the device is almost off is not at a zero signal point and hence its distortions compared to other classes are less.

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