EE2203 Electronic Devices And Circuits Important Questions

1. Explain the working of a PN junction forward bias and reverse bias in detail

2. Draw its VI characteristics and explain the operation of zener diode and define zener

breakdown.

3. Define regulator. Explain the operation of any one type of regulator

4. With a neat sketch, explain the operation of CLC filter

5. Explain how the hybrid parameters hfe , hoe, hie, hre can be determined from the CE

characteristics of a transistor

6. Draw the input and output characteristics of N-P-N transistor in common base configuration

and explain it. How the different hybrid parameters are found out from the above

characteristics

7. Draw and explain input and output characteristics of common emitter configuration of a

transistor

8. Write short note on voltage gain and current gain expressions for CB configuration using

transistor hybrid model

9. Explain in detail about the construction and operation of JFET.

10. Explain the working principle and characteristics of Depletion N-MOSFET under depletion

mode and enhancement mode in detail

11. Write short note on FET as Voltage Variable resistor 12.

explain the operation of Colpitts oscillator with neat diagram 13.

Draw the circuit diagram of a phase shift oscillator using BJT. Derive the expression for its

frequency of oscillation. Determine the minimum hfe for the transistor 14.

Briefly discuss the effect of negative feedback on band width and stability of an amplifier 15.

explain the operation of Schmitt trigger using two transistor for a sinusoidal input with circuit

diagram and waveform 16.

Explain in detail about collector coupled astable multivibrator and its operation with relevant

operation.

17. Explain the operation of UJT saw tooth oscillator 18.

Explain how RC circuits are used as integrator and differentiator. Sketch the output

waveform for the square input

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