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Which filters exhibit their dependency upon the system design for stability purposes?

Which filters exhibit their dependency upon the system design for stability purposes? Correct Answer IIR

Concept:

  • FIR filters are inherently stable since the poles are found only at Z = 0 which is inside the unit circle.
  • For IIR filters to be stable the necessary and sufficient condition is that all poles are inside the unit circle which is attained through system designing or filter designing.

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  • If the poles of the IIR filter will lie outside the unit circle of |z|=1, the filter will be unstable in nature.

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