An IIR system with system function H(z)=(B(z))/(A(z)) is called a mixed phase if:
A. All poles and zeros are inside the unit circle
B. All zeros are outside the unit circle
C. All poles are outside the unit circle
D. Some, but not all of the zeros are outside the unit circle
Answer:A
An IIR system with system function H(z)=(B(z))/(A(z)) is called a mixed phase if:
A. All poles and zeros are inside the unit circle B. All zeros are outside the unit circle C. All poles are outside the unit circle D. Some, but not all of the zeros are outside the unit circle
Explanation: For an IIR filter whose system function is defined as H(z)=(B(z))/(A(z)) to be said a mixed phase and if the system is stable and causal, then the poles are inside the unit circle and some, but not all of the zeros are outside the unit circle.