Digital Electronics — Summer 2025

Draw the symbol of all the logic gates and write their truth tables only.

03 Convert the decimal number 225.225 to binary number and octal number.

Do as directed. 1. Convert the decimal number 43 to hexadecimal number. 2. Find 1’s complement of 000. 3. Find 2’s complement of 000. 4. Convert Gray code 11011 in to binary number.

Design binary to Gray code converter.

Prove following Boolean functions using Boolean theorems. 1. x(x’+y)=xy 2. xy+xy’=x 3. (A’+B’)’=AB

Simplify the Boolean function F(x, y, z)=∑(0, 2, 4, 5, 6). Also draw the AOI logic diagram.

Explain 3 to 8 line decoder with truth table and logic diagram

Design 1-bit magnitude comparator.

Design half subtractor.

Explain 4 to 1 multiplexer with truth table and logic diagram.

Explain JK flip-flop. Also write characteristic table and derive characteristic equation of it.

Implement the Boolean function F=AB’CD’+A’BCD’+AB’C’D+A’BC’Dusing EX-OR and AND gates. Page 1 of

Explain SR latch using NOR gates and SR latch using NAND gates with truth table and logic diagram.

Write the comparison between combinational and sequential circuits.

Convert JK flip-flop to Dflip-flop.

Design a Mod-10 asynchronous counter using Tflip-flops.

Fill in the blanks using bracket. 1. When two inputs of JK flip-flop tied together, the resulting flip-flop is ________ flip-flop. (SR, D, T) 2. One flip-flop can store __________ bit/s. (1, 2, 4) 3. When an inverter placed between two inputs of SR flip-flop, the resulting flip- flop is ________ flip-flop. (JK, D, T)

Convert JK flip-flop to Tflip-flop.

Explain 4-bit universal shift register.

Draw and explain SISO shift register using Dflip-flops.

Write comparison between synchronous and asynchronous counter.

Explain the types of ROM.

Explain buffer register.

Design 4-bit ring counter using Dflip-flips.

Explain SRAMs and DRAMs. Page 2 of