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Kapittel 8 · Reaktive elementerfrequency response

RC High-Pass Filter: Why Gain Rolls In Past the Cutoff

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RC high-pass filter — capacitor in series, resistor to ground, V_out across the resistor; H(jω) = jωRC / (1 + jωRC); gain rises at +20 dB/decade below ω_c = 1/RC and is flat at 0 dB above; phase shifts from +90° (lead) down to 0°. Sister scene to low-pass-bode with the roles swapped.

high-pass filterBode plotcutoff frequencytransfer functionfrequency responsedecibels
ForutsetterRC Low-Pass Filter: Why Gain Rolls Off at the Cutoff
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