Given the problem in above question which of the following s

Given the problem in above question, which of the following statement is correct?

a. The ZOH for reconstruction must have the same sampling rate as the sampling impulse train

b. The ZOH for reconstruction sampling rate can be higher than the sampling impulse train

c. The ZOH for reconstruction sampling rate can be lower than the sampling impulse train.

d. None of the above.

Explain with details

Solution

option b

according to the nyquist criteria sampling frequency must be greater than or equal to twice the modulating signal frequency

so to reconstruct the modulating signal , sampling rate must be higher than the sampling impulse train