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In the 2’s complement number system, we can accomplish the subtraction, A-B, by adding to A the 2’s complement of B; A – B = A + 2’s complement of B. This simple observation allows us to do subtraction using the same circuit used for addition. Note also that since 2’s complement of B = 1’s complement of B + 1 Therefore: A – B = A + 1’s complement of B + 1 Using the block diagram of a 4-bit adder/subtractor unit below, construct the actual circuit.   1. DRAW THE LOGIC DIAGRAM OF THE CIRCUIT 2. DRAW THE ACTUAL CIRCUIT

In the 2’s complement number system, we can accomplish the subtraction, A-B, by adding to A the 2’s complement of B; A – B = A + 2’s complement of B. This simple observation allows us to do subtraction using the same circuit used for addition. Note also that since 2’s complement of B = 1’s complement of B + 1 Therefore: A – B = A + 1’s complement of B + 1 Using the block diagram of a 4-bit adder/subtractor unit below, construct the actual circuit.   1. DRAW THE LOGIC DIAGRAM OF THE CIRCUIT 2. DRAW THE ACTUAL CIRCUIT

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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In the 2’s complement number system, we can accomplish the subtraction, A-B, by adding to A
the 2’s complement of B;
A – B = A + 2’s complement of B.
This simple observation allows us to do subtraction using the same circuit used for addition.
Note also that since
2’s complement of B = 1’s complement of B + 1
Therefore:
A – B = A + 1’s complement of B + 1
Using the block diagram of a 4-bit adder/subtractor unit below, construct the actual circuit.

 

1. DRAW THE LOGIC DIAGRAM OF THE CIRCUIT

2. DRAW THE ACTUAL CIRCUIT

Add/Sub B input (4-bit) A input (4-bit) 1's complement Circuit 4-bit Ripple Adder Carry in
Transcribed Image Text:Add/Sub B input (4-bit) A input (4-bit) 1's complement Circuit 4-bit Ripple Adder Carry in
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