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Q. |
When two LTI systems with impulse responses ha (t) and hb (t) are cascaded then equivalent response is given by |
A. | h(t) = ha(t) + hb(t) |
B. | h(t) = ha(t) – hb(t) |
C. | h(t) = ha(t) hb(t) |
D. | h(t) = ha(t) * hb(t) |
Answer» D. h(t) = ha(t) * hb(t) | |
Explanation: the equivalent impulse response of two systems connected in series (cascaded) is given by convolution of individual impulse responses. |
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