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Exam Questions Papers - Engineering

Q1:

The Causal system given below is __________
H(z) = 6 + z-1 - z-2

A maximum phase

B minimum phase

C mixed phase

D none of these

ANS:B - minimum phase

Minimum phase H(z) = 6 + z-1 - z-1 6z2 + z - 1 = 0 ∴ We have zeros at z = 1/3 and z = - 1/2 ∴ All the zeroes lies inside the unit circle, it is a min. phase system.