Experimental Validation of Memristor-Aided Logic Using 1T1R TaOx RRAM Crossbar Array

TL;DR

This paper experimentally demonstrates memristor-aided logic gates using a 1T1R TaOx RRAM crossbar array, analyzing energy consumption and showing initialization dominates energy use.

Contribution

It provides the first experimental validation of MAGIC logic gates on a 1T1R array and analyzes energy distribution across operation stages.

Findings

Energy consumption is dominated by initialization (85%).

OR and NOT gates successfully implemented on 1T1R array.

Energy split-up: 14.8% execution, 85% initialization, 0.2% read.

Abstract

Memristor-aided logic (MAGIC) design style holds a high promise for realizing digital logic-in-memory functionality. The ability to implement a specific gate in a MAGIC design style hinges on the SET-to-RESET threshold ratio. The TaOx memristive devices exhibit distinct SET-to-RESET ratios, enabling the implementation of OR and NOT operations. As the adoption of the MAGIC design style gains momentum, it becomes crucial to understand the breakdown of energy consumption in the various phases of its operation. This paper presents experimental demonstrations of the OR and NOT gates on a 1T1R crossbar array. Additionally, it provides insights into the energy distribution for performing these operations at different stages. Through our experiments across different gates, we found that the energy consumption is dominated by initialization in the MAGIC design style. The energy split-up is 14.8%, 85%, and 0.2% for execution, initialization, and read operations respectively.