Equivalent noise resistance

In telecommunications, an equivalent noise resistance is a quantitative representation in resistance units of the spectral density of a noise-voltage generator, given by

is the spectral density,

is the Boltzmann constant,

is the standard noise temperature (290 K), so

Note: The equivalent noise resistance in terms of the mean-square noise-generator voltage, e2, within a frequency increment, Δ f, is given by This article incorporates public domain material from Federal Standard 1037C.

General Services Administration.