A Low-Power Configurable Adder for Approximate Applications - 2018


Addition is a key fundamental perform for several error-tolerant applications. Approximate addition is taken into account to be an economical technique for trading off energy against performance and accuracy. This paper proposes a carry-maskable adder whose accuracy can be configured at runtime. The proposed scheme can dynamically select the length of the carry propagation to satisfy the quality requirements flexibly. Compared with a standard ripple carry adder and a typical carry look-ahead adder, the proposed sixteen-bit adder reduced power consumption by 54.1p.c and 57.5percent and vital path delay by seventy two.5% and 54.twop.c, respectively. In addition, results from a picture processing application indicate that the standard of the processed images will be controlled by the proposed adder.

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