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Abstract
Approximate computing forms a design alternative that exploits the intrinsic error resilience of various applications and produces energy-efficient circuits with small accuracy loss. In this proposed method, an approximate hybrid high radix encoding for generating the partial products in signed multiplications that encodes the most significant bits with the accurate radix-4 encoding and the least significant bits with an approximate higher radix encoding. Required method is used for approximations of the high radix values to their nearest power of two. To achieve the desired energy–accuracy tradeoff while comparing with the accurate radix-4 multipliers, the proposed multipliers delives upto 56% energy and 55% area savings, when operating at the same frequency, while comparing with state-of-the art inexact multipliers, outperforming them by upto 40% in energy consumption.