If an RC differentiator is to produce narrow spikes,the time constant should be
A) equal to the input pulse width.
B) 10 times larger than the input pulse width.
C) 10 times smaller than the input pulse width.
D) equal to the square root of R times

Question

Quizplus · Accepted Answer

A RC differentiator produces a spike at the output for a rapid change in input. The time constant of the differentiator determines the width of the spike. If we want narrow spikes, the time constant should be small, i.e., smaller than the input pulse width. Therefore, the best choice is C, which suggests that the time constant should be 10 times smaller than the input pulse width. Choosing options A and B will result in wider spikes, and option D is not relevant to this context.

If an RC Differentiator Is to Produce Narrow Spikes,the Time