Special Section on Solid-State Circuit Design — Architecture, Circuit, Device and Design Methodology
Trading Accuracy for Power with a Configurable Approximate Adder
2019 年 E102.C 巻 4 号 p. 260-268
詳細
2019 年 E102.C 巻 4 号 p. 260-268
Approximate computing is a promising paradigm to realize fast, small, and low power characteristics, which are essential for modern applications, such as Internet of Things (IoT) devices. This paper proposes the Carry-Predicting Adder (CPredA), an approximate adder that is scalable relative to accuracy and power consumption. The proposed CPredA improves the accuracy of a previously studied adder by performing carry prediction. Detailed simulations reveal that, compared to the existing approximate adder, accuracy is improved by approximately 50% with comparable energy efficiency. Two application-level evaluations demonstrate that the proposed approximate adder is sufficiently accurate for practical use.
