Engineering BE Computer Engineering Sem 3 December 2018 2018 Electronics And Communition Fundamentals Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q2 Solve any THREE out of remaining questions
2. Q3 Draw neat and clean diagrams
3. Q4 Assume suitable data if required
4. Q1 the concept and significance of CMRR and Slew Rate in case of op-amps. 5 marks
   • B. Given B=120 and Ig= 3.2 mA for a common-emitter configuration with Q,
   • (b) Ay if a load of 2 kQ is applied
   • (c) Ai with the 2 kQ load. 5
   • C. Discuss the factors that influence modulation index of an FM wave. 5
   • D. Justify that adaptive delta modulation superior to delta modulation. 5 emitter bias configuration as shown in following figure has the specifications: Determine Rc, Re and Rp. 10
   • B. Explain how op-am can be used comparator and zero crossing detector. 10 Paper Subject Code: 50904 Electronics Circuits and Communication Fundamentals is the source of the leakage current in a transistor? If the emitter current of a transistor is 8 mA and Ip is 1/100 of Ic, determine the levels of Ic and Ip. 5
   • B. Draw and explain Colpitts oscillator. 5
   • C. Explain principle of FDM. 5
   • D. Determine the output voltage for the circuit if Vi=5V and V2=3V
   • A. What is DSBSC wave and explain its generation using balanced modulator. 10
   • B. What is multiplexing in communication system? Draw block diagram of TDM-PCM system and explain. 10 Shannon’s theorem on channel capacity What is the maximum capacity of a perfectly noiseless channel whose bandwidth is 120 Hz, in which the values of the data transmitted may be indicated by any one of the
   • B. With respect to neat diagram explain the elements of analog communication system. 10
   • A. What is meant by Nyquist rate in sampling and explain its significance. 5
   • B. Give the proper definition for entropy and information rate. 5
   • C. Write short note on op-amp as differentiator. 5
   • D. Differentiate between Class A and Class C power amplifiers with respect to circuit diagram, operating cycle and power efficiency. 5

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