Analog Circuits Mock Test 1

1. Find the temperature at which a diode current is 2mA for a diode which has reverse saturation current of 10^-9 A. The ideality factor is 1.4 and the applied voltage is 0.6V forward bias.

2. 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.

3. DC resistance of diode is measured at ____________

4. Calculate the forward bias current of a Si diode when forward bias voltage of 0.4V is applied, the reverse saturation current is 1.17x10^-9A and the thermal voltage is 25.2mV.

5. In the circuit shown below voltage V_in is 3V and V_B is 1V. The resistor R₁ and R2 are 1K. Assume both diodes are identical. Forward bias resistance is 10Ω. Cut-in voltage of diode is 0.7V. The voltage V_out is __________

6. What is the value of the voltage equivalent of temperature at room temperature (27^oC)?

7. Which of the following I-V characteristics represents a typical Si diode?

8. Calculate the thermal voltage when the temperature is 25°C.

9. Average AC resistance and dynamic resistance are ____________

10. In the given circuit input voltage Vin is 3V and V₂ is 1V. The resistance R₁ is 1.5K. Cut-in voltage of diode is 0.5V. Forward bias resistance is 10Ω. The current I will be __________