Explanation: The key characteristic of the butterworth filter is that it has a flat pass band as well as stop band. So, it is sometimes called a flat-flat filter. 2. Which filter performs exactly the opposite to the band-pass filter?
A. Band-reject filter
B. Band-stop filter
C. Band-elimination filter
D. All of the mentioned
Answer:A
Explanation: The key characteristic of the butterworth filter is that it has a flat pass band as well as stop band. So, it is sometimes called a flat-flat filter. 2. Which filter performs exactly the opposite to the band-pass filter?
A. Band-reject filter B. Band-stop filter C. Band-elimination filter D. All of the mentioned
Explanation: A band reject is also called as band-stop and band-elimination filter. It performs exactly the opposite to band-pass because it has two pass bands: 0 < f < fL and f > fH.