EQUIVALENT NOISE RESISTANCE

A quantitative representation in resistance units of the spectral density of a noise -voltage generator, given by R n = ( W n )/(k T 0 ), where W n is the spectral density, k is Boltzmann's constant , T 0 is the standard noise temperature (290 K), and k T 0 = 4.00 × 10 -21 watt-seconds. Note: The equivalent noise resistance in terms of the mean-square noise-generator voltage, e 2 , within a frequency increment, f , is given by R n = e 2 /(4k T 0 f ).