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 = π W n k T 0 {displaystyle R_{n}={frac {pi W_{n}}{kT_{0}}}} where W n {displaystyle W_{n}} is the spectral density, k {displaystyle k} is the Boltzmann's constant, T 0 {displaystyle T_{0}} is the standard noise temperature (290 K), so k T 0 = 4.00 × 10 − 21 [ W s ] {displaystyle kT_{0}=4.00 imes 10^{-21},} . 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 = π W n k T 0 {displaystyle R_{n}={frac {pi W_{n}}{kT_{0}}}} where W n {displaystyle W_{n}} is the spectral density, k {displaystyle k} is the Boltzmann's constant, T 0 {displaystyle T_{0}} is the standard noise temperature (290 K), so k T 0 = 4.00 × 10 − 21 [ W s ] {displaystyle kT_{0}=4.00 imes 10^{-21},} . 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 the General Services Administration document 'Federal Standard 1037C'.