FIR filter attenuation in the passband

1. What is passband attenuation?
2. What is the attenuation of a filter?
3. How much attenuation is achieved in the stop band of the filter?
4. Which filter has high attenuation in stop band?

What is passband attenuation?

Passband attenuation refers to the maximum signal loss within the passband of the filter which should ideally be zero; i.e., pass band shall not attenuate the signal it passes; it's a unit gain region.

What is the attenuation of a filter?

Attenuation Rate.

A high attenuation rate helps a filter distinguish between signals of similar frequency and is usually a desirable feature. The attenuation rate is also related to the order of a filter. For a low-pass or a high-pass filter, the attenuation rate will be –20 times the filter's order, in dB/decade.

How much attenuation is achieved in the stop band of the filter?

Depending on application, the required attenuation within the stopband may typically be a value between 20 and 120 dB higher than the nominal passband attenuation, which often is 0 dB.

Which filter has high attenuation in stop band?

The elliptic filter can be designed to have very high attenuation for certain frequencies in the stop band, which reduces the attenuation for other frequencies in the stop band.