What is the system function of all-zero filter or comb filter? – McqOptions

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1.	What is the system function of all-zero filter or comb filter?
A.	( frac{1}{M}(1+z^{-M} e^{j2 }) )
B.	( frac{1}{M}(1+z^M e^{j2 }) )
C.	( frac{1}{M}(1-z^M e^{j2 }) )
D.	( frac{1}{M}(1-z^{-M} e^{j2 }) )
Answer» E.

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