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Exam Questions Papers - Engineering

Q1:

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

A exp (j2pf/t)

B exp (-j2pf/t)

C exp (j2pft)

D exp (-j2pft)

ANS:C - exp (j2pft)

Consider x(t) = ej2pft y(t) = h(t) * x (t) ⇒ y(t) = h(t). ej2pf(t - t) . dt = ei2pfth(t) . e- j2pft . dt = ej2pft x H(f) = x(t) x H(f) ⇒ .