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2016 | OriginalPaper | Chapter

6. High-Radix Arithmetic-Logic Unit (ALU) Based on Memristors

Authors : Ioannis Vourkas, Georgios Ch. Sirakoulis

Published in: Memristor-Based Nanoelectronic Computing Circuits and Architectures

Publisher: Springer International Publishing

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Abstract

This chapter presents a novel method for implementing crossbar-based multi-level memories, where each cross-point cell stores multiple bits. Furthermore, a conceptual solution for novel CMOS-compatible, memristive, high-radix arithmetic logic units (ALUs) is proposed, for future computing systems. More specifically, a hybrid ALU circuit nano-architecture is described, where: (a) CMOS peripheral circuits are used for binary arithmetic operations; (b) a memristive reconfigurable crossbar-based memory block is used to: (i) allow parallel read/write of data; (ii) facilitate the implementation of efficient arithmetic algorithms (e.g. fast partial product creation for multiplication); and (iii) store information in a compact, high-radix form. Instead of single memristors, the crossbar nodes comprise a type of multi-state composite memristive switches, described in Chap. 3, which permit multi-bit storage in a more robust manner. Radix-4 representation is used because: (i) it balances the offered advantages with the peripheral binary conversion circuitry overhead; and (ii) it provides a good density/reliability trade-off. The fine operation and accuracy of the proposed system architecture is demonstrated through SPICE-level simulations.

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Metadata
Title
High-Radix Arithmetic-Logic Unit (ALU) Based on Memristors
Authors
Ioannis Vourkas
Georgios Ch. Sirakoulis
Copyright Year
2016
DOI
https://doi.org/10.1007/978-3-319-22647-7_6