The filter with the system function H(z)=z -k is a:
A. Notch filter
B. Band pass filter
C. All pass filter
D. None of the mentioned
Answer:A
The filter with the system function H(z)=z -k is a:
A. Notch filter B. Band pass filter C. All pass filter D. None of the mentioned
Explanation: The system with the system function given as H(z)=z -k is a pure delay system . It has a constant gain for all frequencies and hence called as All pass filter.