How to calculate stopband attenuation

1. How do you measure stopband attenuation?
2. How much attenuation is achieved in the stop band of the filter?
3. What is passband and stopband attenuation?

How do you measure stopband 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.

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.

What is passband and stopband attenuation?

Q: What is the passband and the stopband? A: Passband is the band of frequencies of the input signal that passes through the filter with an attenuation of less than 3 dB attenuation, while stopband is a band of frequencies of the input signal that are blocked or more highly attenuated by the filter.