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Memristor technology is becoming an attractive option for memory architectures, in-memory computing, and logic applications due to their non-volatility, high density, and low power operation. However, these memristor-based devices are prone to defects because of the non-deterministic nature of nano-scale fabrication. This research describes a methodology for testing memristor circuits for fault detection and fault diagnosis using a unique property of memristor crossbar circuits – sneak paths. This research focuses on the stuck-at low resistance and stuck-at high resistance faults for our analysis. A 3 × 3 crossbar array was used as an example to demonstrate our fault dictionary-based diagnosis approach with improved test time. Our results show that fault diagnosis can be achieved only in three test vectors for the best case and a worst-case of  m  + 1 test vectors for an  m  ×  n  array where  m &gt; n .

Utilizing Sneak Paths for Memristor Test Time Improvement