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In the circuit shown below voltage Vin is 3V and VB1 is -1V and VB2 is 1V. Assume both diodes are identical. Cut-in voltage of diode is 0.7V. Forward bias resistance is 10Ω. The voltage Vout is __________

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In the circuit shown below voltage Vin is 3V and VB1 is -1V and VB2 is 1V. Assume both diodes are identical. Cut-in voltage of diode is 0.7V. Forward bias resistance is 10Ω. The voltage Vout is __________

(a) 0.6V

(b) 1V

(c) 1.7V

(d) 2V

This question was addressed to me in exam.

This question is from Piecewise Linear Model of Diode-2 topic in division Diode Circuit of Analog Circuits

1 Answer

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Best answer
Correct choice is (a) 0.6V

To explain: In this condition both diodes are forward biased

This circuit can be further reduced to by assuming VB as 1V

By network analysis using kirchoff’s voltage rule current through RD2 will be 0.09A.

The voltage in Vout will be VB+VD-0.09×10 = 0.6V.

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