Download OU B.Sc 2019 June-July 4th Semester 3129 Electronics Question Paper

FACULTY OF SCIENCE

B.Sc. IV-Semester (CBCS) Examination, May / June 2019

Subject : Electronics

Paper - IV : Linear Integrated Circuits and Basics of Communication (DSC)

Time : 3 Hours Max. Marks: 80

PART - A (5 x 4 = 20 Marks)

(Short Answer Type)

Note : Answer any FIVE of the following questions.

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1. Give Ideal characteristics of an OP-Amplifier.
2. Explain how voltage regulation can be achieved using OP-Amp?
3. Explain different types of modulation methods.
4. Write about PAM & PCM.
5. Describe how an Op-Amp can be used as an Inverting Amplifier?

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6. Draw the circuit of Astable multivibrator using IC-555.
7. Discuss the need for modulation and define Modulation Index.
8. Discuss the operation of FM discriminator.

PART - B (4 x 15 = 60 Marks)

(Essay Answer Type)

Note: Answer ALL the questions.

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9. (a) Explain the working of OP-Amp as (i) Comparator, (ii) Differentiator and (iii) Integrator
   OR
   (b) Draw the circuit diagram of a Summing amplifier using OP-Amp and explain its working, derive an expression for its output voltage.
10. (a) Explain the working of Wien Bridge Oscillator with circuit diagram and obtain an expression for its frequency.
    OR
    

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    (b) What is analog computation? Explain analog computation circuit using OP-Amp to solve a Simple Second order differential equation with an example.
11. (a) What is amplitude modulation? Derive an expression for AM wave.
    OR
    (b) What is delta modulation? Explain.

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