Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Inductance

Required number input.

Capacitance

Required number input.

Winding resistance

Required number input.

Compute the dynamic impedance in ohms of a parallel resonant LC circuit at resonance. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Parallel impedance

The resulting parallel impedance returned as a number.

• Compact electronics formulas omit some combination of tolerances, temperature drift, bandwidth, loading, parasitics, noise spectrum, nonlinearity, clipping, calibration, layout, and device-specific limits. Typical datasheet values are not guaranteed limits.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Series Resonance Impedance

  Compute the impedance in ohms of a series RLC circuit at resonance, where reactances cancel and only the winding resistance remains.

• Parallel Q Factor

  Compute the Q factor of a parallel resonant LC circuit from its winding resistance, inductance, and capacitance.

• Ideal Capacitor Impedance

  Calculate ideal capacitive reactance Xc=−1/(2πfC) and its magnitude in ohms. ESR, ESL, leakage, and self-resonance are not included.