Digital Electronics - Digital System Projects Using HDL - Discussion


In a frequency counter, what happens at high frequencies when the sampling interval is too long?

[A]. The counter works fine.
[B]. The counter undercounts the frequency.
[C]. The measurement is less precise.
[D]. The counter overflows.

Answer: Option D


No answer description available for this question.

Anubhav said: (Dec 23, 2011)  
Consider an example. Let the sampling time be 1 sec. This means the counter will count number of pulses from the unknown signal for 1sec duration and would display it after 1 sec. thus if the signal is of 800 Hz, at the end of 1 sec, counter would have counted up to 800.

Thus in case of high frequencies and high sampling time, counter might count beyond its limit and overflows

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