Abstract
Due to their very nature, Spin Waves (SWs) created in the same waveguide, but with different frequencies, can coexist while selectively interacting with their own species only. The absence of inter-frequency interferences isolates input data sets encoded in SWs with different frequencies and creates the premises for simultaneous data parallel SW based processing without hardware replication or delay overhead. In this paper we leverage this SW property by introducing a novel computation paradigm, which allows for the parallel processing of n-bit input data vectors on the same basic SW based logic gate. Subsequently, to demonstrate the proposed concept, we present 8-bit parallel 3-input Majority gate implementation and validate it by means of Object Oriented MicroMagnetic Framework (OOMMF) simulations. To evaluate the potential benefit of our proposal we compare the 8-bit data parallel gate with equivalent scalar SW gate based implementation. Our evaluation indicates that 8-bit data 3-input Majority gate implementation requires 4.16x less area than the scalar SW gate based equivalent counterpart while preserving the same delay and energy consumption figures.
Highlights
The information technology revolution our society experienced during the past decade resulted in the generation of huge amounts of raw data, which precessing requires efficient computing platforms[1]
Our evaluation indicates that 8-bit data 3-input Majority gate implementation requires 4.16x less area than the scalar SW gate based equivalent counterpart while preserving the same delay and energy consumption figures
As we evaluated 8-bit data parallel gates we made use of SWs with 10 GHz, 20 GHz, 30 GHz, 40 GHz, 50 GHz, 60 GHz, 70 GHz, and 80 GHz frequencies
Summary
The information technology revolution our society experienced during the past decade resulted in the generation of huge amounts of raw data, which precessing requires efficient computing platforms[1]. Different technologies, e.g., tunneling FET, Graphene pn-Junction, spintronics, and memristor, have been considered as CMOS alternatives to meet the data processing market requirements[5]. Among those Spin-Wave (SW) based computing seems be one of the most promising avenues due to its[5]: (i) Ultra-low power consumption (it doesn’t involve any charge movements), (ii) acceptable delay, (iii) scalability to nm wavelength range, and (iv) intrinsic data parallelism (multiple frequencies can independently and simultaneously coexist in the same waveguide). Two phase encoding based Majority gates were physically realized1415
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