The poles of a digital filter with linear phase response can lie
A. Only at z =0
B. Only on the unit circle
C. Only inside the unit circle but not at z =0
D. On the left side of Real (z) =0 line
Answer:B
The poles of a digital filter with linear phase response can lie
A. Only at z =0 B. Only on the unit circle C. Only inside the unit circle but not at z =0 D. On the left side of Real (z) =0 line
Explanation: For stable systems the poles in z plane must lie inside or on the unit circle and Minimum number of delay elements = (Maximum power of z)-(minimum power of z).