P. Gillet et al., ANALOG SOLUTION OF THE AMBIPOLAR DIFFUSIO N EQUATION, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 321(2), 1995, pp. 53-59
Charge dynamics within the bases of power bipolar devices is described
by a diffusion equation. It is shown that a spectral representation o
f the carrier distribution allows analog solution of this equation, by
means of an equivalent electrical network (RC lines). The calculation
carl be achieved using a general electrical simulation software. As a
n example, rite charge dynamics within the base of a PIN diode is desc
ribed.