Direct Data Transfer Between Sense Amplifiers in DRAM
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Solution Overview
Problem
The latency in data transfers between memory cells in modern computing systems is increasing due to the need for data to pass through multiple memory structure components, such as I/O buffers, memory controllers, and processor registers, which slows down processing speed despite advancements in processor and memory technology.
Innovation Solution
Implementing a memory system that allows direct data transfer between sense amplifiers, bypassing additional memory structure components like I/O buffers, memory controllers, and processor registers, by using control logic to route data from a source sense amplifier to a second-level sense amplifier and then to a destination 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, memory controllers, processor registers), then data transfer completeness is ensured, but data transfer latency increases
Solution Approach 1:
The patent extracts and removes intermediate memory structure components (I/O buffers, memory controllers, processor registers) from the data transfer path between sense amplifiers. By taking out these unnecessary components, the data transfer latency is reduced while maintaining data transfer completeness through direct coupling between sense amplifiers.
Solution Approach 2:
The patent segments the memory system into distinct functional blocks (sense amplifiers, memory cells) and enables direct data transfer between segmented components without requiring passage through higher-level memory structure components. This segmentation allows optimized data paths for specific operations.
2Speed
If data is routed through multiple memory structure components, then system compatibility is maintained, but processing speed decreases
Solution Approach 1:
The patent implements dynamic control of data paths through control logic that can selectively activate different transfer modes (conventional vs. direct). The system dynamically adjusts the data path structure based on operational requirements, enabling high-speed direct transfer when applicable while maintaining compatibility with conventional operations.
Solution Approach 2:
The patent creates a universal memory system that can operate in multiple modes: conventional data transfer through full memory structure components and direct data transfer between sense amplifiers. The control logic provides multi-functionality, allowing the system to maintain compatibility with existing architectures while enabling optimized performance paths.
3Loss of time
If direct data transfer between sense amplifiers is implemented, then data transfer latency is reduced, but control complexity increases
Solution Approach 1:
The patent introduces control logic as an intermediary that manages the complexity of direct data transfer operations. The control logic coordinates sense amplifier operations, manages data line coupling, and ensures proper timing, thereby reducing control complexity to manageable levels while enabling low-latency direct transfers.
Solution Approach 2:
The patent merges the control functions for direct data transfer with the existing memory control architecture. By combining control logic responsibilities and integrating direct transfer management into existing control structures, the patent reduces overall control complexity while maintaining the benefits of direct data transfer.
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.