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The V-I characteristic of a silicon diod...

The V-I characteristic of a silicon diode is shown in the Fig. 14.17. Calculate the resistance of the diode at `(a)I_(D) = 15` mA and (b) `V_(B)=-10 V`

Text Solution

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Considering the diode characteristics as a straight line between I = 10 mA to I = 20 mA passing through the origin, we can calculate the resistance using Ohm’s law.
(a) From the curve, at I = 20mA, V= 0.8 V, I= 10mA, V= 0.7 V
`r_(fb) = DeltaV//DeltaI = 0.1V //10 mA = 10 Omega`
(b) From the curve at `V = -10 V, I=-1 muA`,
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