19-02-2016, 04:53 PM
Abstract
Aim of the project is to design a 4-bit ALU to perform seven arithmetic operations and four logic operations.The circuit is designed so as to meet the following specifications:
Frequency: 200MHz
Power : 23W/cm2
Area : 400x400µm2
The results are verified with AMI06 technology, Spectre spice simulation tools.
Introduction
ALU is a fundamental unit of several combinational circuits. Learning ALU design aids in designing complex circuits.All the arithmetic operations are performed by the Carry look ahead adder using a B-input logic.The B-input logic is based on the equation Y=BiS0+Bi’S1 The logic operations are performed using basic gates.Two select lines are used to perform the operations on two 4 bit inputs in both the units.The third select line is used to select either one of the units.