Download AKTU B-Tech 5th Sem 2015-2016 Integrated Circuits Eec 501 Question Paper

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36 FEC-501

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(Following Paper ID and Roll No. to be filled in your Answer books)

Paper ID: 131521 Roll No:

B.Tech.

(SEM. VI) THEORY EXAMINATION, 2015-16

INTEGRATED CIRCUITS

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[Time:3 hours] [Total Marks:100]

SECTION-A

Note : Attempt all parts. All carry equal marks. Write answer of each part in short. (2x10=20)

1. (a) Define current mirror circuit and current steering process.
2. (b) State the type of distortions that can occur in an amplifier.
3. (c) By what factors is the frequency of an op amp modified limited?

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4. (d) Differentiate between positive feedback and negative feedback.
5. (e) Define the terms VIH and VIL
6. (f) Explain Barkhausen criteria for oscillations.
7. (g) Sketch properly labeled Master Slave D flip-flop.
8. (h) What is the cause of undesirable "oscillations"?

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9. (i) Define level shifter stage.
10. (j) Mention the properties of ideal op-amp.

SECTION-B

Note : Attempt any five questions from this section (10x5=50)

1. Explain the input impedances of common-source, mirror current mirror amplifier, cascade amplifier, and Wilson current mirror amplifier.
2. Why is the gain of an amplifier in dB so conveniently handy as calculus to operate? Find out the expression for voltage gain in dB.

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3. A combinational circuit has 3-inputs A, B, C, and 1-output F. Truth table for the given function is as follows:
   A B C F
   0 0 0 False
   0 0 1 True
   A B C False
   

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   A B C True
   (i) Write the truth table for F. Also write its simplified expression for F. Use the conventional True = 1 and False = 0.
   (ii) Draw CMOS logic circuit for the expression obtained for F using NAND gates only.
4. Derive the expression for Condition for oscillations and derive the condition for frequency of oscillations.
5. Draw and explain the different type of current mirror. Also derive the expression for load.

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6. Design a series amplifier with feedback, for a transistor with a gain of 174 V/V with upper 3dB frequency of 224 MHz to produce an amplifier with upper 3dB frequency of 2.24 GHz. What will be gain of the modified amplifier?
7. Design an audio band output stage that delivers 4 watts into 4-ohm load. Assume VCC-22V. Specify appropriate components.
8. Briefly describe the operation of TTL inverter circuits Draw the diagram. Discuss the mode of operation of 555 timer IC.

SECTION-C

Note : Attempt any two questions from this Section. (15x2=30)

1. Sketch the gate-level representation of D-flip-flop and explain its operation.

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2. CMOS circuit implementation and explain the operation.
3. Explain the different types of parallel adder circuits using their advantages and disadvantages in details.
   Sketch the circuit and transfer characteristics of Schmitt trigger. What are the applications of Schmitt trigger? Explain in details.

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