Signal Development Cache for Low-Latency Memory Reads
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Solution Overview
Problem
Memory devices face throughput limitations due to latency issues in signal development operations, which are slower than sense amplifier operations, affecting latency-sensitive applications.
Innovation Solution
Implementing a signal development cache with cache elements that can be selectively coupled with sense amplifiers, allowing independent development of cell access signals and sequential coupling with the sense amplifier to generate output signals, along with flexible mapping schemes to optimize memory operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If signal development operations are performed sequentially with sense amplifier operations, then signal development can be completed, but throughput is limited due to latency
Solution Approach 1:
The signal development cache performs signal development operations in advance before the sense amplifier is ready to receive signals. Multiple signal development components independently develop signals from different memory cells and store them in cache elements, so that when the sense amplifier becomes available, signals are already prepared and can be transferred immediately, eliminating idle time and improving throughput
Solution Approach 2:
The signal development function is divided into multiple independent signal development components (first, second, third, etc.), each capable of independently developing signals from different memory cells. This segmentation allows parallel processing of multiple signals simultaneously, reducing overall latency and increasing throughput compared to a single sequential signal development operation
2Productivity
If multiple signal development components are used, then parallel signal development is enabled, but device complexity increases
Solution Approach 1:
Multiple signal development components and cache elements are designed with identical, standardized structures that can serve multiple purposes. Each component can work with any memory cell or memory section, and the cache elements can store signals from any source. This modular, universal design allows parallel processing while keeping individual component complexity low and making the system easier to manufacture and control
Data Source
AI summary
Methods, systems, and devices related to signal development caching in a memory device are described. In one example, a memory device in accordance with the described techniques may include a memory array, a sense amplifier array, and a signal development cache configured to store signals (e.g., cache signals, signal states) associated with logic states (e.g., memory states) that may be stored at the memory array (e.g., according to various read or write operations). The memory device may also include a controller configured to determine whether data associated with an address of the memory array is stored in one or more cache blocks of the signal development cache. As an example, the memory device may determine whether the data is stored in one or more cache blocks of the signal development cache based on mapping information associated with the address of the memory array.