EC 6302 DIGITAL ELECTRONICS, Second year, Department of Robotics and Automation Engineering, Model Exam Questions

PART –A (10 ×02 = 20 Marks)
1.      Define ‘min term’ and ‘max term’.
2.      Simplify the given Boolean Expression F=x′+xy+xz′+xy′z′.
3.      Draw the circuits diagram for 4-bit odd parity generator.
4.      Draw the logic circuit of a 2-bit comparator.
5.      Convert JK flip-flop to T flip-flop.
6.      Sketch the logic diagram of a clocked SR flip-flop.
7.      Draw the structure of a static RAM cell.
8.      What is volatile and non-volatile memory?
9.      What are hazard free digital circuits?
10.  What is a state diagram? Give an example.

PART –B (13 x 5 = 65 Marks)

11.   (a)(i) 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)                                                     (8)
      (ii) Simplify the Boolean expression  F=x′y′z′+x′yz+xy′z′+xyz′                              (5)
12.  Write  a note on BCD to 7-segment decoder?                                                              (13)
13.  Design a MOD-5 synchronous counters using JK flip-flop and implement it.             (13)
14.  Describe the RAM and DRAM organization.                                                               (13)
15.  Write notes on hazard free switching circuits?                                                             (13)

PART-C(15 x 1= 15Marks)

16.  Draw and explain Tri-state TTL inverter circuit diagram and explain its operation.  (15)