Sense Amplifier Direct Data Transfer Latency Reduction
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Solution Overview
Problem
The latency in memory-to-memory data transfers is increasing due to the need for data to pass through multiple memory components, such as I/O buffers, cache memories, and processor registers, which slows down processing in modern computing systems with faster processors and larger memories.
Innovation Solution
A memory system that allows direct data transfer between sense amplifiers, bypassing additional memory structure components like I/O buffers, cache memories, and processor registers, by using control logic to route data through a pair of first-level and a second-level sense amplifier, thereby short-circuiting the data path and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data is transferred through conventional memory structure components (I/O buffers, cache memories, processor registers), then data transfer completeness is ensured, but data transfer latency increases
Solution Approach 1:
The patent extracts the essential data transfer function from the complex conventional memory path by enabling direct sense amplifier-to-sense amplifier transfers. This bypasses intermediate components (I/O buffers, cache memories, processor registers) while maintaining data integrity through controlled direct coupling, effectively removing unnecessary complexity from the critical data transfer path.
Solution Approach 2:
The patent segments the memory system into distinct functional zones: a direct transfer path between sense amplifiers for latency-critical operations, and the conventional path through I/O buffers and cache for other operations. This segmentation allows simultaneous optimization of both speed and completeness by routing different data transfers through appropriate paths.
2Speed
If direct data transfer between sense amplifiers is implemented, then data transfer speed increases, but system reliability may be affected
Solution Approach 1:
The patent uses the shared data line as an intermediary medium between source and destination sense amplifiers. This controlled intermediary enables direct high-speed transfer while maintaining signal integrity through the inherent electrical coupling characteristics of the data line, avoiding the need for physical direct connection that would compromise system architecture.
Solution Approach 2:
The data line serves multiple functions: it acts as the transfer medium for direct sense amplifier-to-sense amplifier transfers, maintains compatibility with conventional read/write operations through I/O buffers, and preserves standard memory access protocols. This multi-functionality ensures reliability across different operation modes while enabling high-speed direct transfers.
Data Source
AI summary
Systems and methods for reducing the latency of data transfers between memory cells by enabling data to be transferred directly between sense amplifiers in the memory system. In one embodiment, a memory system uses a conventional DRAM memory structure having a pair of first-level sense amplifiers, a second-level sense amplifier and control logic for the sense amplifiers. Each of the sense amplifiers is configured to be selectively coupled to a data line. In a direct data transfer mode, the control logic generates control signals that cause the sense amplifiers to transfer data from a first one of the first-level sense amplifiers (a source sense amplifier) to the second-level sense amplifier, and from there to a second one of the first-level sense amplifiers (a destination sense amplifier.) The structure of these sense amplifiers is conventional, and the operation of the system is enabled by modified control logic.