If the z-transform of a system is given by \(H\left( z \right) = \frac – McqOptions

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1.	If the z-transform of a system is given by \(H\left( z \right) = \frac{{\alpha + {z^{ - 1}}}}{{1 + \alpha {z^{ - 1}}}}\) where α is real-valued, \|α\| < 1, ROC : \|z\| > \|α\|, then the system is
A.	a low-pass filter
B.	a band-pass filter
C.	an all-pass filter
D.	a high-pass filter
Answer» D. a high-pass filter

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