Design of Ultra-Low Power Consumption Approximate 4-2 Compressors Based on the Compensation Characteristic

Also Available Domains Arithmetic Core|Xilinx ISE

Project Code :TVPGTO598


The main aim of this work is to reduce the power in multiplier by using different 4:2 compressors designs


In this project, three novel approximate 4-2 compressors are proposed and utilized in 8-bit multipliers. Meanwhile, an error-correcting module (ECM) is presented to promote the error performance of approximate multiplier with the proposed 4-2 compressors. Approximate computing is utilized in some digital signal processing applications which are inherent error tolerant circuits. The approximate arithmetic blocks are utilized in them to optimize performance of these circuits. Multiplier is basic in computer arithmetic blocks. Moreover, the 4-2 compressors are widely employed in the parallel multipliers to accelerate the compression process of partial products. In this project, the number of the approximate 4-2 compressor’s outputs is innovatively reduced to one, which brings further improvements in the energy-efficiency. Compared with the exact 4-2 compressors, the simulation results indicate that the proposed approximate compressors UCAC1, UCAC2, UCAC3 achieve optimized delay, power and area, respectively. And the utilization of these proposed compressors in 8-bit multipliers brings reduction of power consumption. 

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Block Diagram


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 multiplier design
  • About Dadda multiplication
  • Knowledge on partial product generation and reduction
  • Knowledge on adders, compressors
  • About approximation computing
  • 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

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