Digital filter ripple

1. What is ripple in a filter?
2. What is meant by ripple in DSP?
3. Which filter shows ripple in the passband?
4. What are the 4 categories of digital filtering?

What is ripple in a filter?

Ripples are the fluctuations (measured in dB) in the pass band, or stop band, of a filter's frequency magnitude response curve. Elliptic and Chebyshev-based filters have constant ripple across their pass bands. While Bessel and Butterworth derived filters have no ripple in their pass band responses.

What is meant by ripple in DSP?

Ripple refers to fluctuations (measured in dB) in the passband, or stopband, of a filter's frequency magnitude response curve.

Which filter shows ripple in the passband?

The Chebyshev and Inverse Chebyshev filters are special cases of the more general class of Complete Chebyshevs. The Complete Chebyshev filter has ripple in the passband and stopband as well as infinite attenuation at certain finite frequencies. Complete Chebyshev low-pass filter.

What are the 4 categories of digital filtering?

There are two categories of digital filter: the recursive filter and the nonrecursive filter. These are often referred to as infinite impulse response (IIR) filters and finite impulse response (FIR) filters, respectively.