The impulse response of a linear time invariant system is a...

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The impulse response of a linear time invariant system is a rectangular pulse of duration T. It is excited by an input of a pulse of duration T. What is the filter output waveform?

A. Rectangular pulse of duration T

B. Rectangular pulse of duration 2T

C. Triangular pulse of duration T

D. Triangular pulse of duration 2T

Answer: Option D

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