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The V-I characteristic of a silicon diode is shown in the Fig. Calculate the resistance of the diode at a) I_(D)=15mA and (b) V_(D)=-10V |
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Answer» Solution :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=20A, V=0.8V`, `I=10mA, V=0.7V` `r_("fb")=DeltaV//DeltaI=0.1V//10mA=10Omega` b) From the curve at `V=-10V.I=-1muA`. THEREFORE, `r_("RB")=10V//1muA=1.0xx10^(7)Omega` |
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