Download PTU B-Tech EEE 2020 Dec 4th Sem 77606 Digital Electronics Question Paper

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Total No. of Pages : 02
Total No. of Questions : 18

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B.Tech. (Electrical & Electronics) (2018 Batch) (Sem.-4)
DIGITAL ELECTRONICS
Subject Code : BTEE-401-18
M.Code : 77606
Time : 3 Hrs. Max. Marks : 60

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INSTRUCTIONS 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.

SECTION-A

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Write briefly :

1. Define Noise Margin?
2. State the different classification of binary codes.
3. State the commutative property of Boolean algebra.
4. What is Propagation Delay?

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5. What is a Karnaugh Map?
6. Give the comparison between synchronous & Asynchronous sequential circuits.
7. State and prove De Morgan’s theorem.
8. Obtain the canonical sum of products of the function Y = AB + ACD.
9. What is EEPROM?

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10. Which gates are called as the Universal Gates? What are its advantages?

SECTION-B

11. Simplify the given expression AB + (AC)' + AB’C (AB + C).
12. Explain the flip-flop excitation tables for JK flip-flop.
13. State the postulates and theorems of Boolean algebra.

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14. Design and explain a comparator to compare two identical words.
15. Explain in detail about Race around condition.

SECTION-C

16. Determine the prime implicants of the function F(W,X,Y,Z)= S(1,4,6,7,8,9,10,11,15)
17. Explain with neat diagrams TTL.

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18. Explain the working of BCD Ripple Counter with the help of state diagram and logic Diagram.

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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