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What type of filter is an antialiasing filter?

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What type of filter is an antialiasing filter?

(a) Band pass

(b) High pass

(c) Low pass

(d) Band stop

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This intriguing question originated from Data Conversion topic in portion Digital Communication Techniques of Avionics

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Correct choice is (c) Low pass

To explain: The antialiasing filter is basically just a low pass filter which allows signals with frequencies less than the cut off value to pass through. The cut off frequency is usually half of the sampling frequency.

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