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The signal from a flow transmitter is filtered using a low-pass filter to ensure that the maximum frequency content of the pressure transmitter signal is 20 Hz. What is the minimum frequency with which the signal must be sampled (digitized) to satisfy the Nyquist sampling criterion

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sqdancefan

Answer:

  40 Hz

Explanation:

To satisfy the Nyquist sampling criterion, the sampling rate must be at least twice the highest frequency contained in the signal being sampled.

  2 × 20 Hz = 40 Hz

The minimum sampling frequency is 40 Hz.

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