2nd-Order All-Pass Filter

Design from specification

2nd-order all-pass: flat magnitude, phase sweeps through −180° at f₀. ω₀ = 1/(RC), Q = Rq/R.

Approximation: Centre f₀ [Hz]: Damping ζ: C [F] (optional): R series: C series:

R [Ω]: C [F]: Rq [Ω]:

Components: R = — C = — Rq = —

Cutoff f₀ = — Hz Q = — ζ = — passband gain = —

Transfer function:
H(s) = —

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