Question

A)

i) The voltage across a Zener diode is not constant. How do you characterize the characteristic in the circuitry?

ii) The voltage across a forward-biased diode is not constant. How do you characterize this characteristic in circuitry?

Answer #1

2(a) Qualitatively hand-sketch log(I) vs. V for a Schottky diode
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difference.
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diode with A*=100A/cm2-K2, T=300K, ?Bn=0.55eV. Compare it with the
IS of a 1 mm2 P+N diode with ND = 1018 cm–3, T=300K and, Dp
=4cm2/s, ?p=1?s.
(c) Compare the forward voltage of the two diodes in (b) at a
forward current of 50A....

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