EC6302 DIGITAL ELECTRONICS Nov Dec 2018 Question Paper

Anna University B.E ECE 03rd Semester EC6302 DIGITAL ELECTRONICS Nov Dec 2018 Question Paper Free Download in PDF / Scanned Version

Anna University Chennai

Question Paper Code : 20408

B. E./B.Tech DEGREE EXAMINATION, NOVEMBER/DECEMBER 2018.

Third Semester

Electronics and Communication Engineering

EC 6302 — DIGITAL ELECTRONICS

(Common to Mechatronics Engineering, Robotics and Automation Engineering)

(Regulations 2013)

(Also common to PTEC 6302 — Digital Electronics for B.E. (Part-time) Second Semester — Electronics and Communication Engineering — Regulations 2014)

Time : Three hours 

Maximum : 100 marks

Answer ALL questions. .

PART A — (10 x 2 = 20 marks)

1.. What are the universal gates? Justify. ,

2. State De-Morgan's Theorem.

3. Write the characteristic equation of 4 x 1 Multiplexer.

4. State the differences between combinational and sequential circuits.

5. Draw the excitation table for D Flip Flop.

6. Draw the state diagram of 3 bit up counter.

7. Compare PAL, PLA and PROM. .

8. Define setup time with timing diagram.

9. Mention the types of sequential circuits and give the difference between them. ‘

10. Define Mealy machine with a state diagram.

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