DIGITAL ELECTRONICS — Summer 2020

Design a logic circuits for AND,OR and NOT gate using only NAND gates.

What is the difference between demultiplexer and multiplexer ? Explain with necessary diagram and truth table.

Explain Dflip flop in detail with circuit diagram and truth table

Derive the SOP expression for following term AB'C' + ABC' + AB'CD + A'BC' + AB

Explain binary to gray and gray to binary conversion with circuit diagram and truth table.

Minimize the following function using tabulation method: F(w, x, y, z) = ∑ (0,1,2,8,10,14,15)

Design a logic circuit for half and full subtraction circuits with K-map equations and truth table.

Convert the following numbers to decimal: (10101.101) , (330.4) , (A325)2816

Construct 3x8 decoders with diagram and necessary truth table.

Explain following terms with example 1) Inter register-transfer operation 2) Arithmetic micro operation 3) Shift micro operation 4) Logic micro operation

Draw the circuit of 3 input TTL(Transistor Transistor Logic) NAND gate and explain its operation.

Explain working of 4-bit binary ripple counter.

Simplify the following equation using K-map and implement using logic gates: F(A,B,C,D) = ∑(0,1,2,3,5,7,8,9,10,12,13)

Explain BCD adder with diagram and truth table

Explain 1's and 2's complement with example

Explain 2-bit UP synchronous counter with K-map equations and circuit diagram

Write short note on PLA.

Reduce the expression A+B[AC+(B+C')D]=A+BD

With neat sketch explain the operation of clocked RS flip flop with NAND and NOR gates.1

Represent the decimal number 8620 in BCD, Excess-3, and Gray code.

Explain 2 bit magnitude comparator with necessary diagram and equation.

List out different types of memories used in digital logic circuits and define them.

Explain meaning of following micro operations 1) T : A+B'+11 2) T : A ˄ B2 3) T : shr A3

Explain BUS transfer logic for two registers

Design a logic circuit with JK flip-flop flip flop for the given state sequence with necessary K-map equation Present state Next state