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Which among the following is the Analog Continuous Modulation technique?

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Which among the following is the Analog Continuous Modulation technique?

(a) PAM

(b) PCM

(c) AM

(d) PM

I had been asked this question during an interview.

Origin of the question is Time Domain Description topic in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications

1 Answer

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Best answer
Correct choice is (c) AM

To elaborate: Only AM (Amplitude Modulation) is Analog Continuous Modulation technique while rest are Digital Modulation techniques. In AM, the amplitude of a carrier wave is varied with respect to the instantaneous amplitude of the message signal. This is how amplitude modulation takes place.

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