US20260038560
2026-02-05
Physics
G11C11/40615
The patent application discloses innovative apparatuses, systems, and methods for managing refresh rates in volatile memory, such as DRAM. The focus is on dynamically adjusting the self-refresh rate based on the number of refresh operations performed between the self-refresh exit and the subsequent self-refresh entry. This dynamic adjustment is achieved by selecting appropriate refresh rate curves from multiple available options, which can be influenced by factors like the number of auto-refresh operations recently performed.
Volatile memory devices, such as DRAM, require periodic refresh operations to maintain stored data due to charge leakage. These refresh operations are crucial for preserving information stored in memory cells, which use capacitors to hold data. Existing technologies typically use fixed refresh rate curves for self-refresh and auto-refresh operations, lacking the flexibility to adapt to varying conditions or operational histories.
The disclosed embodiments describe memory devices that store information in memory cells, with data represented as voltages. Refresh operations are necessary to prevent data loss, and these operations are guided by refresh rate curves. The invention introduces the ability to dynamically select refresh rate curves based on recent refresh activity, allowing for more efficient memory management. This adaptability is crucial for optimizing performance and power consumption in varying operational contexts.
The memory device described includes a memory array with multiple banks, each containing word lines, bit lines, and memory cells. A row decoder and column decoder facilitate the selection of specific lines and cells for read and write operations. The device interfaces with a controller via command, address, and data terminals, receiving commands like refresh, activate, and access commands. The device's internal logic determines the timing of refresh operations using selected refresh rate curves, enhancing flexibility and efficiency.
By allowing dynamic adjustment of refresh rates, the invention addresses limitations of existing technologies that use static refresh rate curves. This flexibility leads to more efficient memory operation, potentially reducing power consumption and improving performance. The ability to tailor refresh rates based on operational history and environmental conditions represents a significant advancement in memory device technology, making it more adaptable to the needs of modern computing environments.