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      • KCI등재

        Approximate Multipliers Using Bio-Inspired Algorithm

        Kunaraj Kumarasamy,K. K. Senthilkumar,Vaithiyanathan Dhandapani 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.1

        As most of the real-world problems are imprecise, dedicating a lot of hardware for precise computations is futile for lowpower applications and few applications where the precision is not of paramount importance. For such applications an imprecise computational block is suffi cient if it has other performance benefi ts like low power and low area. We propose Constrained Cartesian Genetic Programming (CCGP), a variant of CGP to evolve lower order imprecise multipliers and further the higher order multipliers are constructed from them. Gate-level architectures for 2 × 2, 3 × 2, 3 × 3 and 4 × 4 imprecise multipliers are evolved. Also, we propose few partitioning methodologies for the construction of higher order multipliers using the evolved imprecise lower order multipliers. The constructed evolved-partitioned multiplier (EPM) of orders 8 × 8 and 16 × 16 has signifi cant performance benefi ts over the existing multiplier architectures in terms of cell area and power. The circuits are synthesized using Cadence SoC Encounter ® using TSMC ® 180 nm standard cell library. The 16-bit EPMs show a maximum power reduction of 33% compared to other truncated multipliers and an area improvement of 2%.

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