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1. Two identical silicon diodes D1 and D2 are connected back to back shown in figure. The reverse saturation current Is of each diode is 10-8 amps and the breakdown voltage VBr is 50 v. Evaluate the voltages VD1 and VD2 dropped across the diodes D1 and D2 assuming KT/q to be 25 m V.





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  • By: guest on 02 Jun 2017 12.51 am
    According to figure, D2 is forward bias, D1 is reverse biased. Reverse saturation current I0 = 10-8A. in clockwise direction. For Diode D2 Is = I0 Here Is = I0 eqv2/kT = 2 or ev2/0.026 = 2 V2 = 0.018 V Drop across D1 = V1 = 5 - 0.018 4.98 V By KVL in mesh, VD1 = -4.98 V, VD2 = 0.018 V.
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