MU Electronics Engineering (Semester 4)
Discrete Electronic Circuits
December 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


Solving the following questions:-
1 (a) Explain the clamper circuit with proper waveforms.
4 M
1 (b) What are different biasing methods used for common source configuration and hence explain any one in detail.
4 M
1 (c) Explain why the feedback is required in oscillators.
4 M
1 (d) Explain need of constant current source in differential amplifier.
4 M
1 (e) Design self bias circuit using JFET for mid point biasing Let IDSS=8mA, Vp=-3V.
4 M

2 (a) Design voltage divider biased circuit to give Icq=5mA, VCEq=5V and β=100.
10 M
2 (b) Explain complete the frequency response of CS amplifier.
10 M

3 (a) Explain working of CASCODE Amplifier in detail.
10 M
3 (b) For the given circuit find Icq, VCEq, Ad, ACM and CMRR

10 M

4 (a) Explain working of class A transformer coupled power amplifier ad derive equation of power efficiency.
10 M
4 (b) What are different biasing circuits for E MOSFET explain any one in detail.
10 M

5 (a) Explain working of any one high frequency oscillator circuit and give its applications.
10 M
5 (b) Explain current-series feedback amplifier with the help of block diagram and derive expressions for Rif, Rof and Af.
10 M

6 (a) For the given two stage circuit find Ri, Ro and Voltage gain.

12 M
6 (b) Explain MOSFET Wilson current source.
8 M



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