Q5. A half adder is a circuit that adds two bits to give a sum and a carry. Give the truth table for a half adder, and design the circuit using only two gates. Then design a circuit which will find the 2's complement of a 4-bit binary number. Use four half adders and any additional gates. (Hint: Recall that one way to find the 2's complement of a binary number is to complement all bits, and then add 1.)

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter22: Sequence Control
Section: Chapter Questions
Problem 6SQ: Draw a symbol for a solid-state logic element AND.
Question
Q5. A half adder is a circuit that adds two bits to give a sum and a carry.
Give the truth table for a half adder, and design the circuit using only two
gates. Then design a circuit which will find the 2's complement of a 4-bit
binary number. Use four half adders and any additional gates. (Hint: Recall
that one way to find the 2's complement of a binary number is to
complement all bits, and then add 1.)
Transcribed Image Text:Q5. A half adder is a circuit that adds two bits to give a sum and a carry. Give the truth table for a half adder, and design the circuit using only two gates. Then design a circuit which will find the 2's complement of a 4-bit binary number. Use four half adders and any additional gates. (Hint: Recall that one way to find the 2's complement of a binary number is to complement all bits, and then add 1.)
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