STUPIDSID
1
Design a two stage RC coupled amplifier for following requirements:
FL = 20Hz.Av ≥ 2000
SIco = 9
Vo = 3V
Select transistor from the table at the end of question paper.
FL = 20Hz.Av ≥ 2000
SIco = 9
Vo = 3V
Select transistor from the table at the end of question paper.
20 M
2 (a)
Explain the procedure to find lower cut-off frequency for CS amplifier and hence find the lower cut-off frequency for the given circuit.
10 M
2 (b)
Explain Wien Bridge oscillator and hence derive equation of frequency also state the use of it.
10 M
3 (a)
Explain High frequency response of CE Amplifier and state the limitations of CE amplifier.
10 M
3 (b)
Design RC phase shift oscillator to generate frequency of 10KHz.
10 M
4 (a)
Design class A power amplifier for car music system to give output power of 20W to a load of 8Ω.
10 M
4 (b)
For the given circuit find Avf, Rif and Rof.
10 M
5 (a)
For the single input balanced output differential amplifier calculate:
(i) Q point
(ii) Ad
(iii) Ri and
(iv) Ro
Assume βac=βdc=100 for both transistors.
(i) Q point
(ii) Ad
(iii) Ri and
(iv) Ro
Assume βac=βdc=100 for both transistors.
10 M
5 (b)
Explain operation of Class B push-pull amplifier and derive equation for power efficiency.
10 M
6 (a)
Draw block diagram of each type of negative feedback amplifier with equation of gain, feedback factor, input impedance and output impedance.
10 M
6 (b)
Explain any two types of current sources that can be used with differential amplifier.
10 M
Write short notes on any four:-
7 (a)
Hartley oscillator.
5 M
7 (b)
Class C power amplifier with applications.
5 M
7 (c)
Use of RE? in differential amplifier (swamping resistor).
5 M
7 (d)
Analysis of voltage shunt feedback amplifier.
5 M
7 (e)
Darlington amplifier with applications.
5 M
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