Physics-Based SPICE Model of Spin-Torque Oscillators
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概要
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The spin-torque oscillator (STO) is a new compact device operating as a tunable RF oscillator in the tens of gigahertz range whose characteristics are determined by the applied current and magnetic field. In this paper, we present a physics-based empirical circuit-level model of an STO that is compatible with circuit-level simulators such as SPICE. The characteristics of an STO are modeled as physics-based analytic functions of the applied current and external magnetic field. The validity of our model was verified by the HSPICE simulation of a current mirror circuit that contains an STO element. The simulation results are in good agreement with the experimental data in the normal operation range. High-order nonlinear effects at large currents are not included in our model because there is no theoretical equation available yet that can precisely explain these effects.
- 2012-04-25
著者
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Ahn Sora
Department of Electronics Engineering, Ewha Womans University, Seoul 120-750, Korea
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Lim Hyein
Department of Electronics Engineering, Ewha Womans University, Seoul 120-750, Korea
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Lee Seungjun
Department of Electronics Engineering, Ewha Womans University, Seoul 120-750, Korea
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Shin Hyungsoon
Department of Electronics Engineering, Ewha Womans University, Seoul 120-750, Korea
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Lee Seungjun
Department of Electronics Engineering, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul 120-750, Korea
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Shin Hyungsoon
Department of Electronics Engineering, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul 120-750, Korea
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