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In the circuit shown below current I is 2mA and VB is 1V. The resistor R is 1K. Cut-in voltage of diode is 0.7V. Forward bias resistance is 10Ω. The voltage V is __________(a) 3V(b) 2V(c) 1V(d) 0.3VThe question was asked in exam.I would like to ask this question from Piecewise Linear Model of Diode-2 topic in division Diode Circuit of Analog Circuits

Answer»

Correct answer is (a) 3V

For explanation: Since current source is reverse bias to the diode current passes through resistor R. Voltage across resistor R is 2MA X 1K = 2V. Since resistor and diodes are parallel NET output voltage V is VB + voltage across resistor R = 1+2 = 3V.



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