Dipole coupled magnetic quantum-dot cellular automata-based efficient approximate nanomagnetic subtractor and adder design approach. (11th October 2019)

• Record Type: Journal Article
• Authors: Sivasubramani, Santhosh; Mattela, Venkat; Pal, Chandrajit; Acharyya, Amit
• Is Part Of: Nanotechnology. Volume 31:Number 2(2020)
• Publication Date: 2019-10-11
• Subjects: nanomagnetic logic -- nanomagnetic computing -- approximate nanomagnetic logic -- nanomagnetic approximate adder -- nanomagnetic approximate subtractor -- in-plane magnetization; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab475c
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: In this paper, we propose a dipole coupled magnetic quantum-dot cellular automata-based approximate nanomagnetic (APN) architectural design approach for subtractor and adder. In addition, we also introduce an APN architecture which offers runtime reconfigurability using a single design layout comprising only four nanomagnets. Subsequently, we propose the APN add/sub architecture by exploiting shape anisotropy and ferromagnetically coupled fixed input majority gate. The proposed APN architecture designs have been implemented using a micromagnetic simulation tool and performance has been compared with the state-of-the-art approach resulting in a ∼50%–80% reduction in the number of nanomagnets and clock cycles without degradation in the accuracy leading to area and energy efficiency.