📉 RC Low-Pass Filter
Passes low frequencies, attenuates high frequencies. Roll-off: −20 dB/decade.
Cutoff Freq: fc = 1 / (2π × R × C)
Gain at f: |H| = 1 / √(1 + (f/fc)²)
Phase: φ = −arctan(f/fc)
Gain at f: |H| = 1 / √(1 + (f/fc)²)
Phase: φ = −arctan(f/fc)