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.

Winding resistance

Required number input.

Inductance

Required number input.

Capacitance

Required number input.

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

Q factor

The resulting q factor returned as a number.

• Bandwidth-to-Q relationships usually assume a lightly coupled, approximately second-order resonance and a specified bandwidth convention. Loading, multiple resonances, loss variation, and measurement method can change the inferred Q.
• 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.

• Inductor SRF

  Compute the self-resonant frequency of an inductor from its inductance and parasitic winding capacitance.

• Bandwidth From Q

  Calculate the bandwidth of a resonant circuit from its resonant frequency and quality factor.

• Capacitor SRF

  Compute the self-resonant frequency of a capacitor from its equivalent series inductance and capacitance.