PTU Punjab Technical University B-Tech May 2019 Question Papers 3rd Semester Computer Science Engineering (CSE)
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Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech.(CSE)/(IT) (2011 Onwards) (Sem.?3)
DIGITAL CIRCUITS & LOGIC DESIGN
Subject Code : BTCS-303
M.Code : 56593
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.
SECTION-A
Answer briefly :
1. Multiply 1011.01 with 110.1.
2. Discuss the principle of duality.
3. Distinguish between combinational and sequential logic circuits.
4. Define R-2R ladder DAC.
5. What is the purpose of state diagram?
6 Discuss race aro www.FirstRanker.com
und condition in JK flip flop.
7. Draw logic diagram of 3-line to 8-line decoder.
8. Explain level triggering.
9. What is serial-out shift register?
10. Write short note on Programmable Logic Arrays.
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SECTION-B
11. Explain the working of Gray code? Write its importance and uses.
12. Solve the following Boolean functions by using K-Map.
F = (w,x,y,z) = (0,1,4,5,6,8,9,10,12,13,14)
13. With a neat block diagram explain the function of encoder. Explain parity checker.
14. Discuss the advantages and disadvantages of TTL Logic Family.
15. How does a Dynamic RAM cell works? Write its applications.
SECTION-C
16. a) What are Mealy and Moore models of sequential circuits?
b) Give the introduction of Quine-McCluskey method of minimization.
17. Explain the types of counter. Write the steps to design a Synchronous Counter using JK
flip flops.
18. What are the types of analog to digital converter techniques? Explain any one in detail.
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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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This post was last modified on 04 November 2019