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MCQ Practice Question
Signals & SystemsZ-Transform

The frequency response of a stable discrete-time LTI system can be obtained from H(z) by evaluating it on?

  • AThe unit circle z=e^(jω)
  • BThe real axis only
  • Cz=0 only
  • Dz=infinity only
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Correct Answer: A. The unit circle z=e^(jω)
Explanation: When the unit circle is in the ROC, H(e^(jω)) is obtained by evaluating H(z) at z=e^(jω).
Reference: Standard signals and systems: z-transform
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