Home » Signals and Systems » Signals and systems electrical engineering miscellaneous » Question

Signals and systems electrical engineering miscellaneous

Easy Questions
Moderate Questions
Difficult Questions

Signals and Systems

Signals and systems electrical engineering miscellaneous
  1. The frequency response of a causal and stable LTI system is
    H(jω) =
    1 - jω
    1 + jω

    The group delay of the system is
    1. 2
      1 + ω²
    2. - 2
      1 + ω²
    3. 2 tan– 1ω
    4. – 2 tan– 1ω
Correct Option: A

Group delay τ(ω) = -
d
 ∠H(jω)
dω

∠H(jω) = tan–1 (– ω) – tan–1 ω = – 2 tan–1 ω
τ(ω) =
d
 (- 2 tan–1 ω) =
2
dω1 + ω²


Your comments will be displayed only after manual approval.