Threshold Logic with Current-Driven Magnetic Domain Walls

TL;DR

This paper introduces a threshold logic paradigm using current-driven magnetic domain walls, significantly reducing device count in logic circuits by reinterpreting existing gates and extending input capabilities.

Contribution

It reinterprets a magnetic domain wall logic gate as a threshold logic device and extends it to multiple inputs, achieving substantial reductions in device count.

Findings

80% reduction in device count with three-input gates

87% reduction with extended multi-input gates

Reinterprets magnetic domain wall logic as threshold logic

Abstract

The recent demonstration of current-driven magnetic domain wall logic [Z. Luo et al., Nature 579:214] was based on a three-input logic gate that was identified as a reconfigurable NAND/NOR function. We reinterpret this logic gate as a minority gate within the context of threshold logic, enabling a domain wall threshold logic paradigm in which the device count can be reduced by 80%. Furthermore, by extending the logic gate to more than three inputs of non-equal weight, an 87% reduction in device count can be achieved.