Discussion
What distinguishes natural sampling from flat-top sampling?
Answer: B
In natural sampling the pulse top follows the signal for the duration of the pulse, whereas flat-top sampling holds the value captured at one instant. Flat-top is what a sample-and-hold circuit produces and is far more practical, at the cost of the aperture effect. Spacing is uniform in both. Neither holds the peak. And the rate is a separate choice. The two forms differ in what happens during the pulse, not in when the pulses occur. Checking the units of each quantity catches a wrong formula before the arithmetic begins.
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