Robustness of using degree of match in performing analog multiplication with spin-torque oscillators

The multiplication operation is one of the most used, but also one of the most energy-expensive operations in digital systems. Here, we focus on a promising strategy to perform the analog multiplication which is based on the use of two coupled spin-torque oscillators (STOs) using the concept of Degree of Match (DOM). The study is based on the theory of non-linear auto-oscillators with negative damping universally used for STOs. The robustness of the DOM is assessed with respect to the variability and noise perturbances parameters.