Question

The ADC sampling rate should be _____

a.) is only important if noise is present in the data.
b.) much higher than the bandwidth of interest. A good rule is that the sample rate should be at least 10 times the bandwidth.
c.) exactly the same as the bandwidth of interest. If it is higher or lower aliasing will occur.
d.) much lower than the bandwidth of interest. A good rule is that the sample rate should be less than 1/10 of the bandwidth.

Answer 1

The correct ADC sampling rate should be much higher than the bandwidth of interest often at least 10 times greater, to avoid aliasing and preserve signal quality as per the Nyquist theorem.

Step-by-step explanation:

The ADC (Analog-to-Digital Converter) sampling rate is a critical parameter in digital signal processing and should be chosen with care. According to the Nyquist theorem, the sampling rate should be at least twice the highest frequency of the input signal to accurately reconstruct the original signal without aliasing. Therefore, it is incorrect to say that the sampling rate should be 'much lower than the bandwidth of interest' or 'exactly the same as the bandwidth of interest,' as these could lead to aliasing or loss of information.

Accordingly, the correct option is that the sampling rate should be 'much higher than the bandwidth of interest'. A common rule of thumb is that the sample rate should be at least 10 times the bandwidth to ensure an adequate buffer against noise and other factors that could affect signal quality. However, this factor can vary depending on specific application requirements and the nature of the signals being sampled.