BSc IT Sem I ATKT DIGITAL ELECTRONICS Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Attempt any three of the following: 15 marks
   • a. Convert:
   • ii) (2F)16 = (? 2
   • b. Convert :
   • i) (62) 10= ( ? )excess3 2
   • ii) (577)10= ( ? 2
   • iii) bea=( Explain with an example to steps to find a two’s complement of and write 5 the rules of two’s complement subtraction in binary number system
   • d. Solve :
   • e. Solve:
   • ii) (110101001) 2
   • f. Solve:
   • ii) (AFD1 )16- = 3
2. Q2 Attempt any three of the following: 15 marks
   • a. Describe the NAND and the OR gate with the symbol , the logical statement , the Boolean expression and its logical circuit diagram
   • b. State and proof the commutative and associative law in Boolean algebra
   • c. Prove the following
   • i) A+AB=A+B
   • ii) (A+B)ABC =A+B4+C
   • d. Simplify the expression and draw circuit diagram
   • e. Solve the SOP expression using Kmaps = 2 m (1,3,4,5,7,9,11,13,15)
3. Q3 Attempt any three of the following: 15 marks
   • b. With the help of K-Maps build a 2- bit half adder and describe it working Cc. Explain with an example code conversion from binary to gray
   • d. Design a combinational circuit for the following description. The circuit had 4 inputs and 2 output. One of the outputs is true if the major inputs are true, the other output is true if there is a tie between the 4 input
   • e. Describe the working of a comparator
   • f. Describe the working a BCD subtractor
4. Q4 Attempt any three of the following: 15 marks
   • a. Draw the logical circuit diagram and describe the working of a 4:2 decoder
   • b. Draw the logical circuit diagram and describe the working 4:1 multiplexer using 2:1
   • c. Difference between multiplexer and demultiplexer,
   • d. Describe with a truth table the working of D-flip flop
   • e. Describe with a truth table the working T- flip flop
   • f. Describe the working of the JK Flip Flop
5. Q5 Attempt any three of the following: 15 marks
   • a. Short note on synchronous counters
   • b. Describe working of 4 bit binary counter
   • c. Explain the terms bushing and perset of a counter
   • d. Write a short note on Bidirectional shift registers
   • e. Describe the working of the Johnson counter
   • f. What are parallel and shift registers ? Explain

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