Abstract
In this paper a brief theory is given about the amplitude and probability density distribution of a narrow band shot noise. It is found that the probability density distribution follows the normal law and the amplitude distribution is the integral of the normal function. However, if the noise voltage is applied across a nonlinear impedance such as a type 1N34 crystal diode, both the amplitude and probability density distributions are changed. The change depends upon the current-voltage characteristic of the nonlinear impedance. An experimental method is described which can be used to measure the amplitude and the probability density distribution. The noise source was a photomultiplier tube followed by a narrow band amplifier centered at 16 kc. The measured results agree with that obtained by calculations.
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