Exam Questions Paper - ECE Questions and Answers

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If then for this to be true x(t) is __________ .

exp (j2pf/t)

exp (-j2pf/t)

exp (j2pft)

exp (-j2pft)

Answer : Option C

Explanation :

Consider x(t) = e^j2pft

y(t) = h(t) * x (t)

⇒ y(t) = h(t). e^{j2pf(t - t)} . dt

= e^i2pfth(t) . e^{- j2pft} . dt

= e^j2pft x H(f) = x(t) x H(f)

⇒ .

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