A discrete-time all-pass system has two of its poles at 0.25∠0° and 2∠30°. Which one of the following statement about the system is TRUE?

Question

TuteeHUB · Accepted Answer

It has constant phase response over all frequencies.

TuteeHUB · Answer

It has two more poles at 0.5∠30° and 4∠0°.

TuteeHUB · Answer

It is stable only when the impulse response is two-sided.

TuteeHUB · Answer

It has constant phase response over the entire z-plane.

1.	A discrete-time all-pass system has two of its poles at 0.25∠0° and 2∠30°. Which one of the following statement about the system is TRUE?
A.	It has two more poles at 0.5∠30° and 4∠0°.
B.	It is stable only when the impulse response is two-sided.
C.	It has constant phase response over all frequencies.
D.	It has constant phase response over the entire z-plane.
Answer» C. It has constant phase response over all frequencies.

Discussion