Page 40 - Complementarity and Variational Inequalities in Electronics

30 Complementarity and Variational Inequalities in Electronics

FIGURE 2.20 Transistor P–N–P.

known as the inverted common-base gain current. Throughout this section, we
use the notation and conventions of Figs. 2.20 and 2.21.
Let us here assume that the two diodes of the Ebers–Moll model are ideal,
which means that each diode acts as a simple switch. If V E < 0 (resp. V C < 0),

then I = 0 (resp. I = 0), and the diode is blocking. If I> 0 (resp. I > 0), then
V E = 0 (resp. V C = 0), and the diode is conducting. We may then write V E ≤ 0,

I ≥ 0, V E I = 0 and V C ≤ 0, I ≥ 0, V C I = 0. That is, also,

−V E I −V E I
≥ 0, ≥ 0,
, = 0 (2.4)
−V C I −V C I