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.

Noise factor

Required number input.

Convert a linear noise factor to an equivalent system noise figure in decibels. 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]

Noise figure

The resulting noise figure returned as a number.

• Noise figure and noise temperature require a defined source temperature, bandwidth, gain convention, impedance match, and cascade order. Loss ahead of the first stage, frequency dependence, measurement uncertainty, and nonlinear operation can dominate receiver sensitivity.
• 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.

• Noise Figure To Factor

  Convert a system noise figure in decibels to a linear noise factor.

• SNR To dB

  Convert a linear signal-to-noise ratio to an equivalent ratio in decibels.

• Linear Gain To dB

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