The Convex Subdifferential Relation Chapter | 2 27
FIGURE 2.17 Ideal Zener diode model.
FIGURE 2.18 Practical Zener diode model.
Then
⎧
I 1 2 2
⎪ (z − 2V 3 z + V ) if z< V 3
⎪ 2(V 1 −V 3 ) 3
⎪
⎨
∗
ϕ (z) = 0
Z if V 3 ≤ z ≤ V 4
⎪
⎪
⎪ 2 2
⎩ I 2 (z − 2V 4 z + V ) if V 4 <z.
2(V 2 −V 4 ) 4