Self-Adaptive Write Circuit for Low-Power and Variation-Tolerant Memristors

Memristive devices such as memristors that have been intensively studied for their possibilities as a strong candidate for future memories are known to have two problems. First, they need a large current in write operation, and second their process-V-DD-temperature (PVT) variations are large compared with the conventional DRAM and FLASH memories. Moreover, the large writing current can be magnified with PVT variations. In this letter, a new write circuit is proposed to prevent unnecessary power loss by using a self-adjusting circuit for properly sizing the writing pulsewidth, thereby minimizing power consumption. The simulation results show that self-adjusting the pulsewidth can save power by 76% on average, compared to the conventional write circuit with a fixed pulsewidth.