Howtosignalprocessing
- Is ripple and attenuation same?
- What is stop band attenuation?
- What is stopband ripple?
- Is passband ripple and passband attenuation same?
Is ripple and attenuation same?
the ripple is a certain amount of amplification or attenuation tolerated in the pass band of the filter. So it depends if those effects are critical for your application or not. if you are doing a FFT and the amplitude of the spectrum is key, then a low or no ripple low pass filter is required.
What is stop band attenuation?
The stopband attenuation is the difference, in decibels, between the lowest gain in the passband and the highest gain in the stopband. Ideally this would be infinite; the higher the better.
What is stopband ripple?
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.
Is passband ripple and passband attenuation same?
So the passband ripple is the amount of variation in the amplitude, within the designated passband of the filter, and stop band attenuation is the minimum attenuation level with the designated rejection band of the filter.
