Active filters: low-pass, high-pass, band-pass
Analog Electronics · Engineering
Study notes
Audio crossover: LPF 200Hz to woofer (blocks hiss), HPF 2kHz to tweeter. Sallen-Key op-amp 2nd order: -40dB/decade. Anti-alias before ADC: LPF at Nyquist. Design: choose cutoff, order for steepness.