Find the current Ix if the voltage across the diode is 0.5V. The reverse saturation current of diode 10^-11A, the cut-in voltage of diode is 0.6V. Assume that the temperature at which diode operates is 25°C. The resistance R1=2KΩ.(a) 3.97mA(b) 4.51mA(c) 2.45mA(d) 3.05mAI had been asked this question in an internship interview.I'd like to ask this question from Characteristic Equation of Diode-2 in division Diode Circuit of Analog Circuits

Find the current Ix if the voltage across the diode is 0.5V. The rever

1.	Find the current Ix if the voltage across the diode is 0.5V. The reverse saturation current of diode 10^-11A, the cut-in voltage of diode is 0.6V. Assume that the temperature at which diode operates is 25°C. The resistance R1=2KΩ.(a) 3.97mA(b) 4.51mA(c) 2.45mA(d) 3.05mAI had been asked this question in an internship interview.I'd like to ask this question from Characteristic Equation of Diode-2 in division Diode Circuit of Analog Circuits
Answer» Correct option is (d) 3.05mA For explanation: Since voltage drop across diode is 0.5V current through resistor is 0.5/2k = 0.25mA Current through diode where I0 = reverse SATURATION current η = ideality FACTOR VT = thermal voltage V = applied voltage Since ideality factor is not GIVEN take it as one. Current through diode I = 10^-11 x (e^0.5/0.0257) = 2.8mA Total current = 2.8mA + 0.25mA = 3.05mA.

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