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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, $e 2$ , within a frequency increment, $Δ f$ , is given by $R_n = \frac{e^2}{4 k T_0\Delta f}$ .

Source: from Federal Standard 1037C

Categories: Noise

Last updated: 09-02-2005 03:37:07

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10-26-2009 08:16:03
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Equivalent noise resistance