•From
the Brownian motion of electrons in a resistive material.
• pn(f) = kT is the power spectrum where:
•k
= 1.3805 * 10-23 (Boltzmann’s constant) and
•T
is the absolute temperature (°Kelvin)
•This
is a “white” noise (“flat” spectrum)
–From a
color analogy
–White
light has all colors at equal energy
•The
probability distribution is Gaussian