Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 10 (Q.No. 20)
20.
If 
. dt, then F[y(t)] is
. dt, then F[y(t)] is- jsgn(f). x(f)
j2pf . e-jptf . x(f)
Answer: Option
Explanation:
⇒ F{Y(t)} = Y(f) = X(f) x 
sin (t) ⇌ 
By duality :
⇌ sgn + (- f)
⇒ 
⇌ jsgn (- f)
∴⇌ - j sgn (f)
∵ sgn(- f) = - sgn(f)
⇒ Y(f) = X(f). [- j sgn(f)].
Discussion:
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