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Optimized NCFET-based approximate multiplier for energy-aware image applications.

Mamidipaka B R Srinivas¹, Konguvel Elango²

¹School of Electronics Engineering, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India.

Scientific Reports

|October 3, 2025

Summary

This summary is machine-generated.

This study introduces novel Negative Capacitance FETs (NCFETs) for approximate computing, significantly reducing energy consumption in multipliers. The NCFET-based 8x8 multiplier achieves superior energy efficiency and performance for image processing applications.

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Area of Science:

VLSI design and approximate computing
Beyond-CMOS technologies
Low-power circuit design

Background:

High-speed multimedia applications demand error-resilient circuits.
CMOS scaling challenges drive exploration of beyond-CMOS technologies like NCFETs.
Multipliers are crucial for image processing and AI, necessitating performance enhancements.

Purpose of the Study:

To develop highly efficient approximate 4:2 compressors and multiplier circuits.
To introduce an 8x8 approximate multiplier using NCFET technology.
To reduce energy consumption in approximate computing systems.

Main Methods:

Design of approximate 4:2 compressors and an 8x8 multiplier using a 45nm Verilog-A NCFET model.
Simulation of circuits operating at a low voltage of 0.5V.
Implementation and evaluation of the multiplier for image multiplication using MATLAB.

Main Results:

The NCFET 4:2 compressor achieves an energy consumption of 0.122aJ, significantly outperforming CMOS alternatives.
The proposed 8x8 approximate multiplier operates at 0.5V, offering substantial power and energy reduction.
MATLAB simulations show improved PSNR and MSSIM, surpassing existing approximate multipliers in accuracy and energy efficiency.

Conclusions:

NCFET technology offers a promising path for energy-efficient approximate computing.
The developed approximate multiplier design significantly enhances performance and reduces energy usage.
This work demonstrates the potential of NCFETs for next-generation low-power digital circuits.