Sallen-Key Active Filter Calculator
Design Sallen-Key low-pass active filters. Select RC values for Butterworth, Bessel, or Chebyshev response.
Key Formulas
Cutoff: fc = 1/(2π×R×C)
Gain: AV = 1 + Rf/Rg
Q=0.707: Butterworth (maximally flat)
Design Sallen-Key low-pass active filters. Select RC values for Butterworth, Bessel, or Chebyshev response.
Cutoff: fc = 1/(2π×R×C)
Gain: AV = 1 + Rf/Rg
Q=0.707: Butterworth (maximally flat)