**EC8392 DE Question Papers**

Anna University Regulation 2017 ECE **EC8392 **DE** Question Papers for previous years** are provided below. **Previous Year Question Papers for **ECE **3rd SEM EC8392 Digital Electronics, Engineering** are listed down for students to make perfect utilization and score maximum marks with our study materials.

### Anna University Regulation 2017 (ECE) 3rd SEM EC8392 DE – Digital Electronics question paper

1. State De-Morgan’s theorem and mention its use.

2. Express the function Y= A+ BC in canonical POS.

3. Convert the given decimal numbers to their binary equivalent 108.364, 268.025.

4. Why totem pole outputs cannot be connected together?

5. Simplify the following Boolean expression into one literal. W’X(Z’+YZ) + X(W+Y’Z).

6. Convert (115)10 and (235)10 into hexadecimal numbers.

7. Define ‘Minterm’ and ‘ Maxterm’.

8. Draw an active high tri-state Gate & write its truth table.

9. Show how to connect NAND gates to get an AND gate and OR gate?

10. State Distributive law and Duality principle.

11. What is meant by Prime Implicant and Essential prime implicants?

12. Find the minimized Boolean expression of this function F=XY+X(Y+Z) +Y(Y+Z).

13. Implement the given function using NAND gates only. F(X, Y, Z) =m(0,6) .

14. Find the canonical POS form of Y= A+B’C

15. If A & B are Boolean variables and if A=1 & A + B=0, determine B

16. Apply De-Morgan’s theorem to simplify A + BC .

17. Implement Y= (1,4,5,6,7) in SOP form using AOI logic.

18. Determine the Boolean expression for the output of the system shown in figure.

19.Interpret the truth table of EX- OR gate.

20. Simplify: ABC ABC using Boolean theorems.

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