Important Questions in EC2203 Digital Electronics - Nov/Dec 2012 Exams AU,Chennai

Anna University, Chennai Nov/Dec 2012 Examinations

Rejinpaul.com Important Questions

EC2203 Digital Electronics 

III SEM ECE

Unit I-V

1.     Simplify the following Boolean function by using Quine â€"McCluskey method F(A,B,C,D) = âˆ'(0,2,3,6,7,8,10,12,13)

2.     Reduce the following function using K-map technique F(A,B,C,D) =  (0,3,4,7,8,10,12,14) + d( 2,6)

3.     Discuss the general characteristics of TTL and CMOS logic families

4.     Minimize the given terms πM ( 0,1,4,11,13,15) + πd (5,7,8) using Quine-McCluskey methods and verify the results using K-Map methods.  

5.     Explain the operation of carry look ahead adder with neat diagram

6.     Design a combinational circuit that generates the 9’s complement of a BCD digit

7.      Design a excess 3 to BCD code convertor

8.     Realize F(W,X,Y,Z) = âˆ' m (1,4,6,7,8,9,10,11,15) using 4 to 1 MUX

9.     Explain in detail the operation of 4 bit ripple counter

10.How will you convert a D flip flop into JK flip flop

11.Explain the operation of universal shift register with neat block diagram

12.With a neat state diagram and logic diagram ,design and explain the sequence of states of BCD counter

13.Explain read and write operation of memory with timing waveforms

14.A combinational circuit is defined by functions F₁(A,B,C) =âˆ' M(0,1,6,7)

F₂(A,B,C) =âˆ' M(2,3,5,7)

              Implement the circuit with a PLA having three inputs , three product terms and two inputs

15.Design a combinational circuit using a ROM .The circuit accepts a three bit number and outputs a binary number equal to the square of the input number

16.Write short notes on EPROM and EEPROM

17.Describe the hazards that could occur in asynchronous sequential circuits. What are the ways in which they are eliminated

18.Design negative edge triggered   T flip flop from logic gates

19.Write a verilog coding for full adder

20Design a serial adder using moore model and mealy model