# Anti-alias-filter requirement estimate
# Scope: Single-pole low-pass attenuation at Nyquist; no complete anti-alias design.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

sampleRate = 1000 Hz
cutoff = 100 Hz

nyquist := sampleRate/2 [Hz]
magnitude := 1/sqrt(1+(nyquist/cutoff)^2)
attenuationDb := -20*log10(magnitude)

check Nyquist attenuation target in dB: attenuationDb >= 12

scenario alternative: sampleRate = 800 Hz