STUPIDSID
1 (a)
What is an operating point? How to choose an operating point for faithful amplification of an input signal?
6 M
1 (b)
Derive the expressions for the operation point in voltage divider bias configuration. Use accurate method for analysis.
8 M
1 (c)
For the circuit shown in Fig Q1(c), calculate IB, IC, VCE, VC, VB and VE Assume β=100 and VBE=0.7V
6 M
2 (a)
Bring out the difference between Bipolar Junction Transistors and Field effect Transistors.
5 M
2 (b)
Explain the construction and working of N-channel depletion mode MOSFET along with its characteristics curves.
10 M
2 (c)
List and briefly explain some applications of field effect transistors.
5 M
3 (a)
Define the following terms with reference to photo sensors
i) Responsivity
ii) Response time
iii) Noise equivalent power
iv) Spectral Response.
i) Responsivity
ii) Response time
iii) Noise equivalent power
iv) Spectral Response.
7 M
3 (b)
Explain the working of a photo diode along with its VI characteristics.
7 M
3 (c)
Write a short note on Liquid crystal displays.
5 M
4 (a)
With a neat diagram, explain the h-parameter model for common-emitter transistor configuration.
8 M
4 (b)
Explain bandwidth with reference to an amplifier. What are the factors affecting it?
5 M
4 (c)
Explain the importance of cascaded connection of amplifiers, with a diagram.
7 M
5 (a)
Classify large signal amplifier and make a suitable comparison.
10 M
5 (b)
With a block diagram explain the working no Negative feedback amplifiers. How is gain affected in these amplifiers?
10 M
6 (a)
Explain Barkhausen criterion.
6 M
6 (b)
Determine the gain and phase shift for an oscillator circuit with a 1% positive feedback and a two stage CE configuration.
4 M
6 (c)
Explain the working of an Astable Multivibrator with necessary diagrams and expression for frequency of oscillations.
10 M
7 (a)
What is voltage Regulation? With a neat circuit diagram explain the working of a Buck regulator.
12 M
7 (b)
Compare linear power supplies with switched mode power supplies.
3 M
7 (c)
A regulated power supply provides a ripple rejection of -80dB. If the ripple voltage in an unregulated input were 2V, determine the output ripple.
5 M
8 (a)
Discuss any five performance parameters of an operational Amplifier.
5 M
8 (b)
Explain with neat diagrams, the working of low-pass and high pass filters using operational amplifiers.
8 M
8 (c)
For the relaxation oscillator circuit in Fig. Q8(c), determine the peak ? to ? peak amplitude and frequency of the square wave given that saturation output voltage of op-amp is ± 12.5V at power supply voltages of ± 15V.
7 M
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