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AND 기반의 캐리 예측 신호를 활용한 근사 가산기 설계
석혜린(Hyelin Seok),서효주(Hyoju Seo),이정원(Jungwon Lee),김용태(Yongtae Kim) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6
This paper proposes a new approximate adder using AND based carry prediction to improve accuracy. Compared to the lower-part OR adder (LOA) and error tolerant adder I (ETAI), the proposed approximate adder is the most accurate while sacrificing hardware cost. The proposed approximate adder enhances error rate (ER), mean error distance (MED), mean relative error distance (MRED), and mean squared error (MSE) compared to the LOA and ETAI. Specifically, the proposed adder reduces the MED and MRED by 49% compared to the ETAI. Furthermore, the proposed adder shows the best performance when jointly analyze the accuracy and hardware cost.