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Which filter is used to get back the original signal from sampled signal?

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Which filter is used to get back the original signal from sampled signal?

(a) low pass filter

(b) high pass filter

(c) band pass filter

(d) band reject filter

This question was posed to me during an online exam.

My query is from Phase Shift Method in section SSB Modulation of Analog Communications

1 Answer

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Best answer
The correct choice is (a) low pass filter

Explanation: Sampling is the conversion of continuous-time signal to discrete-time signal by sampling the continuous signal with respect to specific time intervals, thereby discritising it. Now to get back the original signal we have to use low pass filter, which attenuates high frequencies and allows only low frequencies to pass.

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