Digital Logic PU Fall 2023 question paper

py What are advantages and disadvantages of analog and digftal systems? Explain.

• b) Determine the value of base x if (50)x=(203)s .
• c) | What is weighted and non-weighted code? Why Gray code is called reflected code?

ay, Simplify the given function using K-Map. Also realize the simplified logic circuit using NAND gate only. F (A, B, C, D) = En(0, 2, 6, 8,10) + d = Em(11, 12, 13, 14, 15) .b)-Construct a full subtractor circuit using two half subtractors. Also verify your answer.

• a) Design a combinational circuit that converts 4-bit Excess-3 code into Gray code.

OR

Design a combinational circuit {hat converts a decimal digit from the 2421. code to BCD. bb State and prove De Morgans theorem. Construct F= AC + B’D only = using universal gates.

ay Design and implement BCD to decimal converter circuit using 3-8 linedecoder.

OR

Implement the following Boolean functions using 342 PLA. F1(A, B, C) = 2(3, 5, 6,7) F2(A, B, C) = £(0, 2, 4,7) bY For the Boolean function F(A, B, C) = At+B‘C:

• i) Obtain the truth table
• ii) Implement it using a MUX
• iii) : Implement it using a ROM

• a) Kealize the following state diagram into a sequential circuit using SR fliflop: Z ‘ 1 / ~ CO) 0 NS YW 0
• b) Define flip flop. Explain the working of JK: flip flop with its truth 7 - table and logic diagrath. Also explain how it eliminates the problem encountered in SR flip flop.

am Design 2-bit synchronous up counter by using JK Flipflop. bY Design a 4-bit arithmetic circuit which performs eight different arithmetic operations,

Write short notes on: (Any two) 2x5

• a) Priority Encoder
• b) Status Register ,
• c) Master-Slave flip-flop : beaten SLKLLLLILLELI |p)