MU Electronics Engineering (Semester 4)
Discrete Electronic Circuits
May 2014
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Solve any four:-
1 (a) For the following clipper circuit sketch the i/p and o/p wave form write equation for Vo.

5 M
1 (b) Compare BJT, JFET and MOSFET
5 M
1 (c) Which components in an amplifier (CS and CE) circuit affect low frequency response? Explain.
5 M
1 (d) State and explain Barkhansen's criteria.
5 M
1 (e) Explain effect of swapping resistor in differential amplifier.
5 M
1 (f) Derive expression of efficiency of clan A Transformer coupled amplifier.
5 M

2 (a) Draw approximate hybrid π model of CE transistor amplifier and derive expressions for Av, Ai, Zi and Zo.
10 M
2 (b) Determine operating point and draw DC load line for the circuit shown:-

10 M

3 (a) Draw two stage CS-CS amplifier circuit and derive expressions for Av, Zi and Zo.
10 M
3 (b) State different types of negative feedback topologies and explain current series in detail using block diagram.
10 M

4 (a) Draw circuit diagram for dual i/p balanced o/p differential amplifier (using any type of devices) and derive expressions for Ad, Ac, CMRR and Ri.
10 M
4 (b) Draw circuit diagram of colpitt's oscillator and explain it's working. State applications, advantages and disadvantages of this circuit.
10 M

5 (a) Justify need for constant current source and explain any one in detail.
10 M
5 (b) Explain working of class B (push-pull) power amplifier.
10 M

6 (a) For the circuit shown find Av, Ri and Ro.

10 M
6 (b) Draw High frequency model for CS JFET amplifier and explain.
5 M
6 (c) Explain importance and need for biasing in amplifier.
5 M



More question papers from Discrete Electronic Circuits
SPONSORED ADVERTISEMENTS