Stop band attenuation of low-pass filter

1. What is attenuation in stop band?
2. How much attenuation is achieved in the stop band of the filter?
3. What is the stop band gain of a low-pass filter with the passband attenuation?
4. What is attenuation in low-pass filter?

What is attenuation in stop band?

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 the stop band gain of a low-pass filter with the passband attenuation?

9. What is the stop band gain of a low pass filter with δ_S as the pass band attenuation? Explanation: If δ_S is the stop band attenuation, then the stop band gain is given by the formula 20log(δ_S). 10.

What is attenuation in low-pass filter?

For a low-pass or a high-pass filter, the attenuation rate will be –20 times the filter's order, in dB/decade. For example, a first-order filter will have an attenuation rate of –20 dB/decade, while a fourth-order filter will have an attenuation rate approaching –80 dB/decade.