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In the given circuit input voltage Vin is 3V and VB is 1.5V. The resistance R is 1.5K. Cut-in voltage of diode is 0.5V. Forward bias resistance is 10Ω. The Voltage V will be ____________

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In the given circuit input voltage Vin is 3V and VB is 1.5V. The resistance R is 1.5K. Cut-in voltage of diode is 0.5V. Forward bias resistance is 10Ω. The Voltage V will be ____________

(a) 2.7V

(b) 3V

(c) 0.8V

(d) 1.5V

The question was asked in an online quiz.

My question is from Piecewise Linear Model of Diode-2 in section Diode Circuit of Analog Circuits

1 Answer

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Best answer
Correct answer is (b) 3V

For explanation: In piecewise linear model, we can consider diode as a voltage source of 0.5V along with an ideal diode. VIN being applied is 3V, which is greater than 1.5-0.5 V, and hence the diode is reverse biased and input appears at output.

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