Low Error Efficient Approximate Adders for FPGAs

Also Available Domains Arithmetic Core|Xilinx ISE

Project Code :TVPGTO620

Objective

The main aim of this paper is to design low error efficient approximate adders for FPGAs. We are implementing the approximate adders based on optimized LUT based designs at the LSP of the adder implementation.

Abstract

In this project, we are aimed to design an approximate adder which is based on LUT structures. In general whatever the implemented approximate or accurate adders are mostly implemented in ASIC implementations and sometimes based on the application when these modules are incorporated in FPGA based applications which implies tat that the reprogrammable or reusable circuits involves such ASIC based modules, these FPGA applications are unable to meet the real time parameters as per the specifications. So in order to apply it in Re programmable or re-usable circuits, here we are first introducing two different 2 bit adders which are implemented using LUT structures. After that these are utilized to construct n bit adder which is n-bit approximate adder. Based on the usage of the proposed two bit adders, here we are suggesting two different n bit approximate adders. The two proposed n bit approximate adders are LEADx (low error and area efficient approximate adder) and APEx (area and power efficient approximate adder. Both approximate adders are composed of an accurate and an approximate part. APEx has smaller area and lower power consumption than the other approximate adders than the existing adders. As a case study, the approximate adders are used in video encoding application.

NOTE: Without the concern of our team, please don't submit to the college. This Abstract varies based on student requirements.

Block Diagram

Specifications

Software Requirements:

Xilinx Vivado Tool
HDL: Verilog

Hardware Requirements:

Microsoft® Windows XP
Intel® Pentium® 4 processor or Pentium 4 equivalent with SSE support
512 MB RAM
100 MB of available disk space

Learning Outcomes

Basics of Digital Electronics
VLSI design Flow
Introduction to Verilog Coding
Different modeling styles in Verilog

Data Flow modeling
Structural modeling
Behavioral modeling
Mixed level modeling

Introduction to Arithmetic circuits
Knowledge on types of approximate adder circuits
Different approximation techniques
Knowledge on approximate FA adder designs
Applications in real time
Xilinx Vivado for design and simulation
Generation of Netlist
Solution providing for real time problems
Project Development Skills:

Problem Analysis Skills
Problem Solving Skills
Logical Skills
Designing Skills
Testing Skills
Debugging Skills
Presentation Skills
Thesis Writing Skills

Demo Video

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Tools

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Xilinx Vivado
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FPGA

Others

Matlab Interfacing