B.E-B.E Computer Engineering DIGITAL INTEGRATED CIRCUITS(Karunya University, Coimbatore-2012)

Reg. No. ________                                                                                                                                                   

Karunya University

(Karunya Institute of Technology and Sciences)

(Declared as Deemed to be University under Sec.3 of the UGC Act, 1956)

 

End Semester Examination – November/ December - 2012

 

Subject Title: DIGITAL INTEGRATED CIRCUITS                                                          Time: 3 hours

Subject Code:            09EC214                                                                                                                Maximum Marks: 100          

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              

Answer ALL questions

PART – A (10 x 1 = 10 MARKS)

 

1.         Convert binary 110.001₂ to a decimal number.

2.         How is hexadecimal to binary conversion made? State with an example.

3.         What are universal gates?

4.         State the application of parity generator and checker.

5.         Draw the logic symbol of an inverter.

6.         Mention any two 74 devices.

7.         Draw the IEEE symbol of RS flip flop.

8.         What is the use of D FF in digital computers?

9.         The total number of cells in a memory determines its _________.

10.       Define cache memory.

 

PART – B (5 x 3 = 15 MARKS)

 

11.       Use 2’s complement arithmetic method to add +125 and -68.

12.       State DeMorgan’s theorem.

13.       Explain the size of pull-up resistance when used as external drive for TTL loads.

14.       Define Schmitt trigger.

15.       Write the difference between RAM and ROM.

PART – C (5 x 15 = 75 MARKS)

 

16.       Explain the following codes   a.         ASCII code    b.         EXCESS – 3code                   c.         GRAY code.                                                                                                                                                                                                                                                               (3x5)

(OR)

17.       a.         Write the four rules for binary addition.                                                                                                                                 (5)

b.    Add the 16 bit numbers : 0000 1111 1010 1100 and 0011 1000 0111 1111. Show the corresponding hexadecimal and decimal numbers.                                                                                      (5)

            c.         Draw the adder -subtractor circuit.                                                                                                                                         (5)

 

18.       Draw the Karnaugh map of

a.  Y = F(A,B,C,D) = Π_m(0,1,3,8,9,10,14,15)                                                                                                                 (7.5)

            b.         F(W,X,Y,Z)= ∑(0,2,7,8,9,10,12,13,14,15)                                                                                                                 (7.5)

(OR)

19.       a.         Explain the multiplexer with a neat diagram.                                                                                                          (5)

           b.         Design a multiplexer circuit for the function F(A,B,C)= ∑(0,13,4,5,6)                                            (5)

           c.         Draw a 1 *16 demultiplexer.                                                                                                                                                  (5)

 

20.       Discuss in detail about TTL – to - CMOS interface.                                                                                                 

(OR)

21.       Explain in detail about the TTL parameters.                          

 

[P.T.O]

                       

22.       With a neat diagram explain the operation of serial in parallel out shift register.

(OR)

23.       Describe in detail about the asynchronous ripple counter with a neat diagram.  

                                                                                                          

24.       Describe in detail about the concept of memory addressing.                        

(OR)

25.       Write technical note on:            

a.  EPROM                                                                                                                                                                                             (7.5)

b.  DRAM                                                                                                                                                                                                    (7.5)

                                                                                        

Earning:  ₹ 5.50/-