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For low level amplitude modulation, amplifier must be ________

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For low level amplitude modulation, amplifier must be ________

(a) Class C amplifier

(b) Class B amplifier

(c) Class D amplifier

(d) class A amplifier

The question was posed to me in an interview for job.

Enquiry is from Generation of AM Waves topic in division Amplitude Modulation of Analog Communications

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Correct option is (a) Class C amplifier

The best I can explain: In low level AM, modulation is done at low power of carrier and modulating signal therefore output power is low. Therefore, power amplifiers are used to boost the carrier and modulating signal. Thus, Class C amplifier is used.

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