Download PTU B.Tech 2021 Jan ECE 3rd Sem 78747 Digital System Design Question Paper

Roll No.

Total No. of Pages : 02

Total No. of Questions: 18

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B.Tech. (ECE) (Sem.-3)

DIGITAL SYSTEM DESIGN

Subject Code: UC-BTEC-302-19

M.Code: 78747

Time: 3 Hrs.

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Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

Answer briefly :

1. Convert decimal number 23.5 into binary, octal and hexadecimal number system.
2. Realize A'B + AB' using NAND gates only.
3. Enlist various steps to subtract two numbers using 2's complement.

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4. Draw 3 bit odd parity generator.
5. Design 8:1 multiplexer using 2:1 multiplexer.
6. Write all the decimal digits using seven segment display.
7. What are excitation tables? Write excitation tables of all the flip flops.
8. Draw all types of shift registers.

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9. Draw binary ladder D/A converter.
10. What are the capabilities of VHDL?

SECTION-B

11. Minimize the following expression using Q-M method :
    Y = ?m( 0, 2, 5, 7, 8, 10, 13, 15)

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12. Design Gray to Excess-3 code converter.
13. Convert JK flip flop into T flip flop.
14. Write a VHDL code for 4:1 Multiplexer.
15. Draw and explain Random Access Memory.

SECTION-C

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16. Design 3 bit up synchronous counter and draw its state diagrams.
17. Explain counter type A/D converter and its working.
18. Realize a 4 variable function using 8:1 multiplexer.

NOTE: Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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