Thursday, February 10, 2022

Anna University EC1201 Digital Electronics Nov Dec 2021 Question Paper

Anna University Previous Years Question Paper

Question Paper Code : 86565

B.E./B.Tech. DEGREE EXAMINATIONS, NOVEMBER/DECEMBER 2021.

Third Semester

Electronics and Communication Engineering

EC 1201 – DIGITAL ELECTRONICS

(Regulations 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 x 2 = 20 marks)

1. Prove the Boolean theorems x + x = x, x . x = x .

2. What are don’t care minterms? State the use of don’t care minterms.

3. What is tristate logic? What are the demerits?

4. State the features of Bipolar logic families.

5. Give the circuit and truth table of Half-adder.

6. Define Multiplexer.

7. Give significance of priority encoder.

8. Distinguish between EPROM and EEPROM.

9. Enumerate the types of ROMs.

10. Compare PAL and PLA devices.

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