EC2203 MJ2014 Digital Electronics 3rd Semester Question Paper - Reg2008

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Anna University
Question Paper Code :51395
B.E./B.Tech. DEGREE EXAMINATION, MAY/JUNE 2014.
Third Semester
Electronics and Communication Engineering
EC 2203/EC 34/080290010/10144 EC 304 — DIGITAL ELECTRONICS
(Regulation 2008/2010)
(Common to PTEC 2203 Digital Electronics for B.E. (Part-Time) Third Semester –Electronics and Communication Engineering Regulation 2009)



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PART A — (10 x 2 = 20 marks}

1. Apply De-Morgan's theorem to [(A + B) + C]
2. Convert 0.35 to equivalent hexadecimal number.
3. Draw the logic, circuit of a 2 bitcomparator.
4. What is priority encoder?
5. Compare the logics of synchronous counter and ripple counter.
6. Sketch the logic 'diagram of a clocked SR flip flop.
7. Draw the structure of a static RAM cell.
8. List the advantages of PLDs.
9. What is a state diagram? Give an example.
10. Write the VHDL code for a half adder.

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