Series OSS                                                                                                                      Code No. 118

                                                          DIGITAL ELECTRONICS & MICRO PROCESSORS
                                                                                       (Theory)
Time allowed : 3 hours                                                                                        Maximum Marks : 60
Instructions : Attempt all questions.

 

1. (a) What  are  the  applications and advantages of digital signal processing ?    4
    (b) Convert the following decimal numbers to binary numbers :    4
(i) 39
(ii) 185
    (c) Add the following binary numbers :    4
(i) 1001 and 1100
(ii) 1011 and 1111
                                       OR
Draw a full adder circuit and explain its operation.    12

 

2. (a) Explain the following :    4x2
(i) Priority encoder
(ii) Seven segment LED display

(b) Give the types of multiplexer and demultplexer and give oneexample of each type.    4
                                        OR
Explain the operation of the following using truth table:    4x3
(i) RS flip flop
(ii) D type flip flop
(iii) JK flip flop

 

3. (a) Describe the operation of asynchronous counter.
    (b) Describe the operation of universal shift register.

 

4. Explain the general principle of counter type A/D convertor.    12
                                         OR
(a) Give a brief description of PROM.    6
(b) Explain the expansion of memory in terms of word length and capacity.

 

5. (a) Draw the block diagram of 8085 microprocessor.    6
    (b) For a microprocessor, explain in brief the following    6
(i) Data and address bus
(ii) Control bus