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Find voltage VOUT if the reverse saturation current of the diode is 1.1×10-8A, the cut-in voltage of diode is 0.6V and assume the temperature as 25oC.

Find voltage VOUT if the reverse saturation current of the diode is 1.1×10-8A, the cut-in voltage of diode is 0.6V and assume the temperature as 25oC. Correct Answer 0.3148V

Equation for diode current where I0 = reverse saturation current η = ideality factor VT = thermal voltage V = applied voltage Since in this question ideality factor is not mentioned it can be taken as one. Take VT as its standard value 0.026V. Voltage VD = ηVTln(I/IO + 1) = 1 x 0.0257ln (2 x 10-3/(1.1 x 10-9))+1) = 0.0257ln(1,818,182) = 0.3704 V.

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