Simulation of coupled spin torque oscillators for pattern recognition
Simulation of coupled spin torque oscillators for pattern recognition
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DOI：
10.1063/1.5042423
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发表时间：
2018-10-21
影响因子：
3.2
通讯作者：
Becherer, Markus
中科院分区：
文献类型：
--
作者：
Popescu, Bogdan;Csaba, Gyorgy;Becherer, Markus
本文采用电路级仿真研究了自旋转矩振荡器（STO）的同步动力学，并展示了一种基于STO动力学的模式识别方案。考虑到STO的半径或厚度等参数的变化，我们进行了灵敏度分析，以确定不同STO耦合方法的鲁棒性。在指出交叉耦合结构优点的基础上，提出了一种用于模式识别的耦合方案。在电阻耦合网络中编码了几种模式，并在相应的网络初始化后成功地识别了这些模式。最后，通过提取相应的脉冲灵敏度函数，我们展示了如何将现有的解析相域模型适用于STO阵列。我们将分析模型的结果与STO的数值模型进行了比较，得出结论，两者吻合良好，从而为设计提供了一种快速的方法。AIP出版社出版。
In this paper, we use circuit-level simulations to investigate the synchronization dynamics of spin torque oscillators (STOs) and demonstrate a pattern recognition scheme based on STO dynamics. We perform a sensitivity analysis in order to determine the robustness of the different STO coupling methods, considering parameter variations, such as radius or thickness of STOs. After pointing out the advantages of the cross coupled architecture, we demonstrate a coupling scheme for pattern recognition. Several patterns are encoded in the resistive coupling network and are successfully identified, after the network has been initialized correspondingly. Finally, by extracting the corresponding impulse sensitivity function, we show how an existing analytical phase domain model can be adapted to the STO array. We compare the results of this analytical model with the numerical model of the STO and conclude that they agree well providing thus a fast method for design. Published by AIP Publishing.