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September 10, 2025

Design And Evaluation Of Energy-Efficient Approximate Multipliers

Puntos clave

Approximate multipliers significantly reduce power consumption while introducing some imprecision, proving useful in various applications.
The proposed designs utilize two approximate 4:2 compressors in an 8×8 Dadda multiplier, achieving a balance between accuracy and efficiency.
Error analysis confirms the designs' effectiveness, examining metrics like Error Rate and Error Distance to quantify imprecision.
Simulations were conducted using Xilinx Vivado, ensuring the proposed designs meet practical computational needs.

Resumen

Multipliers stand as essential components that play a pivotal role in computational tasks. Their importance is found not just in achieving accurate and high-speed calculations but also in optimizing power efficiency. Approximate multipliers are useful in applications where a modest level of imprecision is tolerated but does not affect the overall outcome. In this paper, two approximate 4:2 compressors are proposed and utilized in an 8×8 Dadda multiplier. By strategically introducing controlled approximations, by sacrificing precision, multipliers with proposed approximate compressors offer reduction in power consumption, area utilization, and delay, by compromising on accuracy. The error analysis is further verified on the scales of Error Rate (ER), Error distance (ED) and multiple other metrics. Xilinx Vivado software is used to simulate and synthesize the proposed designs.

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