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Semiconductor Electronics Five Marks Questions

12th Standard

    Reg.No. :
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Physics

Time : 01:00:00 Hrs
Total Marks : 50
    10 x 5 = 50
  1. The given circuit has two ideal diodes connected as shown in figure below. Calculate the current flowing through the resistance R1.

  2. Four silicon diodes and a 10 Ω resistor are connected as shown in figure below. Each diode has a resistance of 1Ω. Find the current flows through the 10Ω resistor.

  3. A transistor having α = 0.99 and VBE = 0.7V, is connected in the common-cmiitter configuration as shown in figure. If the transister is in saturation region, find the value of the collector current.

  4. In the circuit shown in the figure, the BJT has a current gain (β) of 50. For an emitter-base voltage VEB = 600 mV, calculate the emitter-collector voltage VEC (in volts).

  5. In the circuit shown in the figure, the input voltage Vi is 20 V, VBE = 0 V, and VCE = 0 V. What are the values of IB, IC, β?

  6. The current gain of a common emitter transistor circuit shown in figure is 120. Draw the DC load line and mark the Q point on it. (VBE to be ignored).

  7. What is the output Y in the following circuit, when all the three inputs A, B, and C are first 0 and then 1?

  8. In the combination of the following gates, write the Boolean equation for output Y in terms of inputs A and B.

  9. Prove the Boolean identity AC + ABC = AC and give its circuit description.

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