Read Cache Mitigates Reset Read Disturb in Memory Devices

The patent applies preliminary action by performing a reset operation before the memory cell threshold voltage degrades to a critical level. The reset operation is proactively executed based on predicted future degradation, preventing the memory cell from entering a failure state. This is achieved by monitoring read operation counts or elapsed time and automatically initiating reset operations in advance.

The patent implements feedback mechanisms to monitor the state of memory cells and adjust read operation parameters accordingly. The system tracks threshold voltage degradation through read disturb detection and uses this information to control reset operations, creating a closed-loop system that adapts to actual memory cell conditions and prevents reliability failures.

The patent applies dynamics by making the inter-pulse delay variable rather than fixed. The delay duration is dynamically adjusted based on the specific memory cell state, read operation patterns, and degradation risk assessment. This allows the system to use longer delays when needed for reliability while maintaining shorter delays when memory cells are stable, optimizing both reliability and speed.

The patent changes the temporal parameter of read operations by implementing variable inter-pulse delays. Instead of using a constant delay period, the system adjusts the delay parameter based on memory cell conditions, read disturb detection results, and predicted degradation trajectories, allowing optimization of the reliability-speed tradeoff through parameter adaptation.

The patent applies preliminary anti-action by performing reset operations only when and where needed, based on predicted threshold voltage degradation. Instead of uniformly resetting all memory cells frequently, the system identifies specific memory cells or regions that are at risk of degradation and applies reset operations selectively to those areas, preventing unnecessary energy consumption while maintaining reliability.

The patent implements local quality by applying different reset operation strategies to different memory cell regions based on their individual degradation characteristics. The system monitors and identifies specific memory cells requiring reset operations and applies them locally rather than globally, optimizing energy efficiency by concentrating reset operations only where threshold voltage degradation is detected or predicted.