U.G. DEGREE EXAMINATION, NOVEMBER 2017
Computer Science
Allied DIGITAL ELECTRONICS
(CBCS 2011 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Write the informations about ASCII code.
2. What is meant by Excess 3 code?
3. Write the technical configurations of multiplexers.
4. What is meant by PLA?
5. Write the truth table of RS-flipflop.
6. What are the types of shift registers?
7. Write the principle of MOS technology.
8. Write the principle of CMOS technology.
9. Draw the circuit of resistive divider.
10. Draw the circuit of 4-bit D/A converter.
Sub. Code
1BCESA1/
1BCEA1
AFC-10497
2
Sp 6
Part B x 5 25)
Answer all questions, choosing either or
11. Prove that 0.
12. Explain about the magnitude comparator.
Or
Describe about the 1-OF-16 decoder.
13. Explain with function table of JK flipflop.
Or
Explain about ring counters.
14. Explain about DTL circuits.
Or
Describe the bipolar transistor characteristics.
15. Describe the dual slope A/D conversion.
Or
Explain about the binary ladder.
Part C x 10 30)
Answer any three questions.
16. Explain about the positive and negative logic.
17. Describe the binary adder substractor.
AFC-10497
3
Sp 6
18. Explain about the clocked RS flipflops.
19. Describe the TTL logic.
20. Describe the continuous A/D conversion techniques.
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