Question

Butterworth and sallen key difference between

Answer 1

 



Sallen-Key Low Pass Filter Calculator
This calculator calculates the capacitor values for a Sallen-Key low pass Butterworth, Bessel, and Chebyshev filters. The Sallen-Key filter is a simple active filter based on op-amps stages, which is ideal for filtering audio frequencies. The calculator only computes filters that have an even number of poles, which is a more efficient use off op-amps.  Odd order filters require a single extra real pole which still requires an op-amp, so it makes sense to just use a higher order even filter.  For example, if an application requires a third order filter requiring 2 op-amps, it makes more sense to use a forth order filter, which also requires 2 op-amps.hope this answer was helpful