Using the curves of Fig. 1.48a, what level of temperature coefficient would you expect for...

Using the curves of Fig. 1.48a, what level of temperature coefficient would you expect for a 20-V diode? Repeat for a 5-V diode. Assume a linear scale between nominal voltage levels and a current level of 0.1 mA.

FIG. 1.48 Electrical characteristics for a 10-V, 500-mW Zener diode.