Impulse

Designing high-pass filters using impulse invariance

Designing high-pass filters using impulse invariance
  1. Why can t we use impulse invariance technique for implementing digital highpass filter?
  2. Which method is suitable for designing high pass filter?
  3. Which filter Cannot be designed using impulse invariance method?
  4. What is impulse invariance method for designing IIR filter?

Why can t we use impulse invariance technique for implementing digital highpass filter?

One of the main disadvantages of realizing digital filters using impulse invariance is aliasing. According to the Nyquist sampling criterion, in order for the frequency response of the digital filter to match that of the corresponding analog filter with impulse response h(t), h(t) has to be band-limited.

Which method is suitable for designing high pass filter?

A highpass filter is to be designed, using the 'direct' method, i.e. by placing transfer function poles and zeros at suitable points in the z-plane.

Which filter Cannot be designed using impulse invariance method?

The impulse invariance method is inappropriate for designing high-pass filters or stop-band filters due to spectrum aliasing that results from the sampling process.

What is impulse invariance method for designing IIR filter?

Impulse invariance is a technique for designing discrete-time infinite-impulse-response (IIR) filters from continuous-time filters in which the impulse response of the continuous-time system is sampled to produce the impulse response of the discrete-time system.

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