EDC MID - II Questions

Unit – V

1. Comparison of CB,CE & CC amplifier configurations.
2. A transistor is connected in CC configuration and its h-parameters are h_ie= 1100Ω, h_re=2.5x 10^-4, h_fe=50, h_oe=24μ A/V, the circuit uses R_L=10kΩ and R_S=1KΩ. calculate gain A_i, input resistance R_i & voltage gain A_v of this amplifier.
3. A transistor used in CE amplifier connection has the following set of h-parameters h_ie= 1kΩ, h_re=5 x 10^-4, h_fe=100, h_oe=5 x 10^-4 Ω^-1, R_L=5kΩ and R_S=15KΩ. Determine i/p impedance ,o/p impedance, current gain & voltage gain.
4. Explain each & every component in common emitter amplifier circuit.
5. Analyse CE amplifier circuit using h-parameters.

Unit-VI

1.      Explain the principle of MOSFET in depletion mode with neat sketches and o/p characteristics.

2.      Draw the structures of an n-channel JFET and explain its principle of operation. Why is the name field effect used for the device? Show the circuit symbol of JFET.

3.      a. Define r_d, g_m, and  μ of JFET.

b. Write the features of FET and its types.

4.      Explain drain transfer characteristics of JFET.

5.      a. Explain types of MOSFET.

b. Explain the operation of Enhancement n-channel MOSFET with drain & transfer      characteristics.

Unit- VII

1. Explain UJT characteristics with neat sketches.
2. a. Explain UJT relaxation oscillator with neat graph.

b. Explain application of UJT.

3. a. Explain CS amplifier with Fixed bias.

b. Find Z_i, Z_o, A_v for fixed bias circuit R_G=1MΩ ,  R_D=5.1KΩ, V_DD= 10v ,V_GS= -1.5V, g_m=2ms.

4. Explain the operation of common drain amplifier.
5. Explain with neat sketches FET CS with voltage divider bias.

Unit-VIII

1. Explain the construction and V-I characteristics of a tunnel diode with help of energy band diagrams.
2.  Draw the basic structure of SCR and explain its characteristics.
3. Explain construction & characteristics of schottky diode and its applications.
4. Explain the operation of photodiode, How it will work as variable resistance device , its applications.
5. Explain
1. Varactor diode
2. Schottky barrier diode.

  

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