Equivalence of the collective and the corpuscular theories of noise in junction diodes

There are at present two methods of approach to the problem of noise in p-n junction diodes: 1) the corpuscular theory and 2) the more fundamental collective theory. In the first the noise is expressed in terms of the fate of individual carriers, and in the second the noise is described in terms of distributed diffusion noise and recombination noise sources. The equivalence of the two methods is demonstrated by integrating the continuity equation and identifying the various groups of carriers showing up in the corpuscular theory.