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.

PSRR (dB)

Required number input.

Convert power-supply rejection ratio from voltage-ratio decibels to a linear rejection factor, 10^(PSRR/20). A 80 dB PSRR means a 10,000:1 small-signal voltage rejection at the stated frequency. 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]

Rejection Ratio

The resulting rejection ratio 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.

• PSRR dB

  Compute the power supply rejection ratio in decibels as 20 x log10(delta Vsupply / delta Vout); both deltas must be positive.

• Gain dB To Linear

  Convert an antenna power gain in decibels to a linear power ratio.

• Linear Gain To dB

  Convert a linear antenna power ratio to an equivalent gain in decibels.