Answered: 1 (subtract) 0 (add) A4 B4 A3 B3 A2 B2…

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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Question

The circuit shown below is a 4-bit adder subtractor. The circuit subtracts by doing 2's complement arithmetic, where we take the 2's complement of the number being subtracted.

The 2's complement process consists of 2 steps.

Explain how the circuit shown below

1. Takes the complement of the number being subtracted; and

2. Adds 1 to the complement.

1 (subtract)
0 (add)
A4 B4 A3 B3 A2 B2 A1 B1
Cin
7483
Cout

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