Howtosignalprocessing
- What will be the condition of Butterworth filter?
- How does a Butterworth filter work?
- What happens when you increase the stages of a Butterworth filter?
- What is the limitation of Butterworth filter?
What will be the condition of Butterworth filter?
In Butterworth filter, mathematically it is possible to get flat frequency response from 0 Hz to the cut-off frequency at -3dB with no ripple. If the frequency is more than the cut-off frequency, it will roll-off towards zero with the rate of -20 dB/decade for the first-order filter.
How does a Butterworth filter work?
The Butterworth filter is a type of signal processing filter designed to have as flat frequency response as possible (no ripples) in the pass-band and zero roll off response in the stop-band. Butterworth filters are one of the most commonly used digital filters in motion analysis and in audio circuits.
What happens when you increase the stages of a Butterworth filter?
If the Butterworth filter order increases, then the cascaded stages within the Butterworth filter design increases and also the brick wall response & filter gets closer as shown in the above figure. In general, there are various topologies used for implementing the linear analog filters.
What is the limitation of Butterworth filter?
However, one main disadvantage of the Butterworth filter is that it achieves this pass band flatness at the expense of a wide transition band as the filter changes from the pass band to the stop band. It also has poor phase characteristics as well.
