Paper

Approximate Multipliers Based on New Approximate Compressors

Volume Number:
65
Issue Number:
12
Pages:
4169
–
4182
Publication Date:
June 2018

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Abstract

Approximate computing is an emerging trend in digital design that trades off the requirement of exact computation for improved speed and power performance. This paper proposes novel approximate compressors and an algorithm to exploit them for the design of efficient approximate multipliers. By using the proposed approach, we have synthesized approximate multipliers for several operand lengths using a 40-nm library. Comparison with previously presented approximated multipliers shows that the proposed circuits provide better power or speed for a target precision. Applications to image filtering and to adaptive least mean squares filtering are also presented in the paper.

Description

IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 65, no. 12, pp. 4169-4182, Dec. 2018, doi: 10.1109/TCSI.2018.2839266.