EC6302 Digital Electronics, Second year, Department of ROBOTICS & AUTOMATION ENGINEERING First  and Second Units Model Questions.

PART –A (10 ×02 = 20 Marks)



1.      State Demorgan’s Theorem
2.      What is a totem pole output?
3.      What are Don’t care terms?
4.      Define ‘min term’ and ‘max term’
5.      State Distributive Law
6.      What is Prime Implicant?
7.      Design a half subtractor using basic gates.
8.      Give examples for combinational circuit.
9.      What is an encoder?
10.  Implement the given function using NAND gates F(x,y,z)= Σm(0,6)


PART –B (5 x 13= 65Marks)

11.  Simplify the Boolean function using K-map. F (w, x , y, z ) = Σ(0, 1, 2, 4, 5, 6, 8, 9, 12, 13, 14 )                                                                                                             (13)
                                                           
12.  Reduce the following function using K-map technique.
F(A,B,C,D)= Ï€(0,3,4,7,8,10,12,14)+d(2,6)                                                                (13)
                                                                                                           
13.  Simplify the following Boolean function by using a Quine-McCluskey method.                F (A, B, C, D) = Σm(0, 2, 3, 6, 7, 8, 10, 12, 13 )                                              (13)

14.  Derive the equation for a 4-bit look ahead carry adder circuit                                 (13)

15.  Draw & explain the block diagram of a 4-bit parallel adder / Subtractor.                   (13)
                                                           
PART –C (15x1= 15Marks)


16.  Define Boolean expression and explain with examples?                                           (15)