Full Marks: 60
Pass Marks: 24
Time: 3 hours
Attempt any two questions: (2 x 10 = 20)
- Design the 4-bit synchronous up/down counter with timing diagram, logic diagram and truth table.
- Design a full subtractor with truth table and logic gates.
- Design a decimal adder with logical diagram and truth table.
Attempt any eight questions: (8 x 5 = 40)
- Differentiate between Analog and Digital system.
- Convert the following octal numbers to hexadecimal.
- Which gates can be used as inverts in additional to the NOT gate and how?
- Draw a logic gates that implements the following
- $ A = ( Y_1 \oplus Y_2) (Y_3 \odot Y_4) + ( Y_5 \oplus Y_6 \oplus Y_7 ) $
- $ A = ( X_1 \odot X_2) + (X_3 \odot X_4) + ( X_4 \odot X_5) \oplus ( X_4\odot X_7 ) $
- State and prove De-Morgan’s theorem 1st and 2nd with logic gates and truth table.
- Reduce the following expressions using K-map $ \overline{A} + B(A+ \overline{B}+D) (\overline{B}+C) (B+C+D) $
- Differentiate between a MUX and a DEMUX.
- Explain the operation of Decoder.
- What are the various types of shift registers?
- What do you mean by Synchronous counter?