Engineering B.E. (Computer Engineering) Sem 3 Electronic Circuits and Communication Fundamentals May 2024 Question Paper - Mumbai University | munotes
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Questions asked in this paper
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Q1 Solve any four 20 marks
- (a) Draw and explain in brief the output characteristics of CE configuration
- (b) Inthe Colpitts oscillator, and C2 If the frequency of the oscillator is 10kHz,find the value of the inductor and the required gain
- (c) Draw and explain in brief: block diagram of typical OP-AMP
- (d) Draw and explain in brief: block diagram of the SSB modulation system
- (e) Draw and explain basic block diagram of the digital communication
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Q2 (a) Discuss the principle of amplitude modulation .Draw and explain the block diagram of the A M transmitter 10 marks
- (b) State necessity of biasing. Draw circuit and explain collector feedback 10
- (a) Draw the equivalent op-amp circuit and draw and explain the transfer characteristics of Op-Amp 10
- (b) In an inverting amplifier the input voltages are 5Vpp and 3Vpp with operating frequency of 3kHz draw the circuit diagram and output waveform for the given input voltages 10
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Q4 (a) Explain Frequency demodulation using Foster—Seely discriminator. 10 marks
- (b) Inalow level AM modulator with a modulation coefficient m=0.8 a quiescent gain Aq =100,an input carrier frequency fe=500kHz with amplitude and a 1000Hz modulating signal find the maximum and minimum voltage gains and the respective output voltage 10
- (a) Determine the deviation ratio and worst-case bandwidth foran FM system with a maximum frequency deviation of 40kHz and a maximum
- (b) Explain: Information (41) Entropy (iii) Information rate (iv) Channel 10
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Q6 (a) Write Short notes (Any Four) 20 marks
- (i) comparison of DM and ADM
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