Modification of A. Van der Ziel relation for natural noise in diodes with non-ideality factor of I-V characteristic e > 1

The spectrum of natural noise in junction of the diode with non-ideality factor of the I-V characteristic greater than one, e > 1, is investigated. It is shown, that the model by A. Van der Ziel is inapplicable for e > 1 in the region of small currents (except the 'ideal' case e = 1). At small currents the spectrum of noise is described by the Nyquist relation. To solve this problem we accept that the I-V characteristic is described by a few 'ideal' junctions connected in serial; in case of e = n = 1, 2, 3,... these may be n identical junctions. The total current noise includes noise sources of all junctions. The presented result is the modification of A. Van der Ziel relation for e'1.