How do I select an AC coupling capacitor?

AC coupling capacitor forms high-pass filter with input resistance of next stage. Set f_c well below lowest frequency of interest: f_c = 1/(2π·R_input·C) 1/(2π×10k×20) = 796nF, use 1μF.

What is the response at very low frequencies?

Below f_c: |H| decreases at -20dB/decade. At f = f_c/10: only 10% of signal passes. RC high-pass blocks DC (f=0) completely. Capacitor is an open circuit to DC.

Can I use RC high-pass for audio applications?

Yes. Set f_c below 20Hz (lowest audible frequency) for transparency, or higher for bass cut effect. Subwoofer crossover: high-pass at 80-120Hz for main speakers; low-pass to subwoofer.

RC High-Pass Filter Calculator

Design RC high-pass filter: f_c = 1/(2πRC), attenuation: |H(f)| = (f/f_c)/√(1+(f/f_c)²). AC coupling capacitor sizing. Bass cut filter. Remove DC offset while passing AC signals.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Design RC high-pass filter: f_c = 1/(2πRC), attenuation: |H(f)| = (f/f_c)/√(1+(f/f_c)²). AC coupling capacitor sizing. Bass cut filter. Remove DC offset while passing AC signals. Use the rc high-pass result to inform your clinical assessment.

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Frequently Asked Questions

How do I select an AC coupling capacitor?

What is the response at very low frequencies?

Can I use RC high-pass for audio applications?