EC6202 Electronic Devices and Circuits, Second year, Department of Robotics and Automation Engineering, Model Exam Questions

EC6202 Electronic Devices and Circuits, Second year, Department of Robotics and Automation Engineering, Model Exam Questions

PART A (10*2=20)

1.      What is transition capacitance and Diffusion capacitance?

2.      Mention the applications of diode.

3.      Compare BJT and FET.

4.      Difference between JFET and MOSFET.

5.      Draw the high frequency model of JFET?

6.      Write down the need of cascading the amplifiers.

7.      What is CMRR? List the various methods of improving CMRR.

8.      What is neutralization in tuned amplifier?

9.      Define frequency stability in oscillators.

10.  State the Barkhausen criterion.

PART B (5*13=65)

11.  Explain the working of bridge rectifier. Give the expressions for RMS current, PIV, ripple factor and efficiency.

12.  With neat sketch, explain the construction, operation and characteristics of SCR.

13.  Draw the ‘h’ parameter equivalent circuit for a typical common emitter amplifier and derive expression for Ai,Ri,Av and Ro.

14.  Draw a differential amplifier and its equivalent circuit. Derive for Ad and Ac.

15.  Explain about RC Phase Shift oscillator and derive the expressions.

PART C (1*15=15)

16.  What is Neutralization? Explain any one method in brief.