Tribhuvan University
Bachelor of Information Technology
Semester 1 · TU Board 2079
Course Title: Digital Logics (BIT103)
Full Marks: 60Pass Marks: 24Time: 3 hours
Candidates are required to give their answers in their own words as far as practicable.
Group A
Attempt any Two questions.(2 × 10 = 20)
- 1.10
Design a BCD-to Seven-segment decoder to display decimal numbers 1, 2 and 4.
- 2.10
What are the drawbacks of clocked RS flip flop? Explain the operation of a JK flip flop along with its characteristic table, characteristic equation circuit diagram and timing diagram.
- 3.10
Design a sequential circuit using JK flip-flop with the help of given state diagram. [figure in the original paper]
Group B
Attempt any Eight questions(8 × 5 = 40)
- 4.5
Convert (110.101)_8 into binary and decimal number system.
Answer comingAlso asked in 2080, 2078
- 5.5
Subtract (739.57)₁₀— (78.35)₂ using both 10's and 9's complement.
Answer comingAlso asked in 2078
- 6.5
What is magnitude comparator? Design 2-bit magnitude comparator.
- 7.5
Define Half-subtractor with truth table and logic diagram.
Answer comingAlso asked in 2078, 2077
- 8.5
What is decoder? Implement 8 × 1 MUX using 2 × 1 MUX.
Answer comingAlso asked in 2078
- 9.5
Design and explain the operational characteristics of Dflip flop.
- 10.5
Design Mod-5 synchronous counter using T- flip flop.
Answer comingAlso asked in 2078
- 11.5
Draw a Serial-In Serial-Out Shift register and explain it.
Answer comingAlso asked in 2078
- 12.5
Write short notes on: (Any two) a. BCD code b. Status Register c. Ring Counter
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