Stuck-at-OFF Fault Analysis in Memristor-Based Architecture for Synchronization

Nonlinear circuits may be interconnected and organized in networks to couple their dynamics and achieve synchronization, a process that is commonly observed in nature. Recent works have shown that memristors may be used as coupling elements in synchronization applications. However, these devices may suffer from low endurance and thus switching faults. Hence, evaluating redundancy and adaptive properties against possible device failures is important. In this direction, we study the performance of a network of chaotic circuits that are coupled using memristors organized in a crossbar geometry. This topology is analyzed in terms of robustness while assuming the existence of defective coupling devices. Our simulation results, based on a physics-based model of bipolar memristor, demonstrate the adaptive behavior of the crossbar architecture and show evidence of different network topologies whose performance outperforms that of the fully functional crossbar.