Equivalent noise resistance

In telecommunication, an equivalent noise resistance is a quantitative representation in resistance units of the spectral density of a noise-voltage generator, given by $R_n = \frac {\pi W_n}{k T_0}$ where $W_{n}$ is the spectral density, $k$ is the Boltzmann's constant, $T_{0}$ is the standard noise temperature (290 K), so $kT_0 = 4.00 \times 10^{-21}\,[Ws]$ .

Note: The equivalent noise resistance in terms of the mean-square noise-generator voltage, e², within a frequency increment, Δ f, is given by

R_n = \frac{e^2}{4 k T_0\,\Delta f}.

This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C".

Equivalent noise resistance

See also