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PDM is generated by ________

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PDM is generated by ________

(a) Bistable multivibrator

(b) Monostable multivibrator

(c) Astable multivibrator

(d) Schmitt trigger

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

This is a very interesting question from Detection of AM Waves in division Amplitude Modulation of Analog Communications

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Correct answer is (b) Monostable multivibrator

Best explanation: PDM (Pulse Duration Modulation) is used to produce an analog signal with the help of a digital source. Monostable multivibrators are used to generate a single output pulse of a particular width. Its output is either high or low when a suitable external pulse is applied.

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