IES-ESE (Engineering Services) Electronics Analog and Digital Circuits-Counters, Registers, Memories, and Microprocessors Study Material (Page 5 of 11)

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Binary Subtractor

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A combinational circuit that performs the subtraction of two bits is called a half subtractor. One that performs the subtraction of three bits (two significant bits and a previous borrow) is a full subtractor. The names of the circuits stem from the fact that two half subtractors can be employed to implement a full subtractor.

Half Subtractor

Let us consider the truth table of half subtractor. There are four possible combinations for the inputs. When both…

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Binary Multiplication

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Introduction

Early microprocessors were designed to implement only addition and subtraction as the basic operations. Today, almost all microprocessors implement, four basic operations performed by arithmetic circuit. These are addition, subtraction, multiplication, and division. Inclusion of multiply and divide operations help to implement the digital signal processing algorithm in DSP. Many digital system applications require multiplication and division for operands of significant size to be executed at very high speeds. Even computers require these two basic operations other than addition and subtraction.

Binary Multi…

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