Elliptic filter matlab

1. What is elliptic function filter?
2. How do you make an elliptic filter?
3. Why is elliptic filter better?
4. Where are elliptic filters used?

What is elliptic function filter?

An elliptic filter (also known as a Cauer filter, named after Wilhelm Cauer, or as a Zolotarev filter, after Yegor Zolotarev) is a signal processing filter with equalized ripple (equiripple) behavior in both the passband and the stopband.

How do you make an elliptic filter?

Bandpass Elliptic Filter

Design a 20th-order elliptic bandpass filter with a lower passband frequency of 500 Hz and a higher passband frequency of 560 Hz. Specify a passband ripple of 3 dB, a stopband attenuation of 40 dB, and a sample rate of 1500 Hz. Use the state-space representation.

Why is elliptic filter better?

Compared with the same order Butterworth or Chebyshev filters, the elliptic filters provide the sharpest transition between the passband and the stopband, which accounts for their widespread use.

Where are elliptic filters used?

The key application for the elliptic filter is for situations where very fast transitions are required between passband and stopband. It could be that spurious signals fall just outside the required bandwidth and these need to be removed.