STUPIDSID
1(a)
Draw the differential amplifier circuit using two op-amp. State advantage of one additional op-amp in that. Show how its output is related to input using necessary derivations.
7 M
1(b)
Design the Wein bridge using JFET, to produce a sinusoid output of frequency 2KHz. The FET has g m =2.5 ms and μ=35.
7 M
2(a)
Explain the working of Hartley oscillator. Derive the expression for frequency of oscillation.
7 M
2(b)
Derive the expression for current gain with resistive load using hybrid π model.
7 M
2(c)
The following low frequency parameters are known for a given transistor at IC=1.3 mA, VCE= 10V at room temperature and the h-parameters are as follows.
hfe =50, hie = 1100, hre=2.5x10-4 , hoe =24μA/V.
At the same point f T = 50 MHz and Cob =3pF. Compute all the values of hybrid π parameters of CE transistor model.
hfe =50, hie = 1100, hre=2.5x10-4 , hoe =24μA/V.
At the same point f T = 50 MHz and Cob =3pF. Compute all the values of hybrid π parameters of CE transistor model.
7 M
Solved any one question from Q.5 & Q.6
3(a)
Explain the positive full wave rectifier using op-amp.
7 M
3(b)
Draw the hybrid π common emitter transistor model. Also derive the expression for input conductance.
7 M
4(a)
Explain working of 555 timer based Monostabe multivibrator. Design the same for the output pulse width of 10 ms.
7 M
4(b)
Prove that output is integral function of Input.
7 M
5(a)
Explain the basic differentiator using an op-amp. What are the problems associated with this configuration? How they are overcome?
7 M
5(b)
Explain how op-amp can be used to generate free running square wave with necessary circuit diagram and waveforms. Show how time period can be calculated.
7 M
Solved any one question from Q.7 & Q.8
6(a)
What is PLL? Explain operation of PLL with basic blocks and mention any four applications of it in radio communication.
7 M
6(b)
What is need of clipper circuit? Explain op-amp as a positive and negative clipper along with necessary waveforms.
7 M
7(a)
Explain the working of a Schimitt trigger using op-amp
7 M
7(b)
Analyze second order Butterworth high Pass filter. Draw its frequency response and state design procedure.
7 M
8(a)
Derive transfer function of Sallen-key low pass filter
7 M
8(b)
Sketch Delyiannis-Friend circuit and obtain its transfer function.
7 M
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