Dr. Santhosh Sivasubramani Profile

Dr. Santhosh Sivasubramani

at Indian Institute of Technology Hyderabad

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Proceedings Article | 20 August 2020 Poster + Presentation + Paper

Efficient in-plane nanomagnetic non-majority logic gate based arithmetic computation

Santhosh Sivasubramani

Proceedings Volume 11470, 1147041 (2020) https://doi.org/10.1117/12.2575669

KEYWORDS: Logic devices, Logic, Magnetism, Anisotropy, Computer architecture, Statistical analysis, Spintronics, Software development, Nanomagnetism, Quantum dots, Nanoelectronics, Nanoengineering, Nanotechnology

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Nanomagnetic Logic (NML) based computation started emerging as a key alternative towards the Beyond CMOS based Rebooting Computing paradigm. Arithmetic computation using this NML can be performed using majority (based on the principles of Magnetic Quantum-dot Cellular Automata) and non-majority logic gates. However there have been extensive studies on the majority logic gates based NML arithmetic architectures, its counterpart needs extensive analysis. Kurtz et al., and Varga et al., have performed the pioneering work in designing non- majority based `AND', `OR' operations. Here in this study, we introduce the non-majority voting gate based half-subtractor and adder architecture design methodology. To the best of author's knowledge this is the first time demonstration of arithmetic nanomagnetic implementation using non-majority gate. Subsequently, it can be inferred from the micromagnetic simulations and modeling that an asymmetrically shaped nanomagnet can be used as a compute nanomagnet in performing computation. The results show that only 4 nanomagnets are required to perform half subtractor/adder leading to area efficient design. This reduction is achieved by exploiting the principles of SP hybrid anisotropy and Boolean optimizations. Thus it can be observed that the non-majority voting based computation can lead to area efficient nanomagnetic arithmetic architecture design. Consequently, the thermal bit-stability analysis has also been carried out for the proposed sub-5o nm design.

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