Adaptive SRAM Delay Parameter Control for Timing Optimization
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Solution Overview
Problem
Existing semiconductor memory devices, particularly SRAM, face challenges in optimizing timing parameters to enhance memory access performance without compromising reliability, due to process variations, temperature, and aging effects.
Innovation Solution
A method and system for adapting the delay parameter of a memory-cell array by initializing it, writing test data, reading and comparing data, and iteratively adjusting the delay parameter to achieve optimal timing ratios between operation and pre-charge portions of the clock cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed timing parameters are used in SRAM memory operations, then device complexity is reduced and ease of manufacture is improved, but memory access performance cannot be optimized for process variations, temperature, and aging effects
Solution Approach 1:
The patent implements dynamic timing parameters that automatically adjust during runtime based on actual memory operation conditions. The delay parameter is adapted iteratively by writing test data, reading it back, comparing results, and adjusting the delay value to optimize the ratio between operation portion and pre-charge portion of clock cycles, thereby resolving the contradiction between fixed simplicity and dynamic performance optimization
Solution Approach 2:
The patent employs a feedback mechanism where memory operation results are monitored and used to adjust timing parameters. By writing test data, reading it back, comparing the read data with written data, and using the comparison results to adjust the delay parameter, the system continuously optimizes memory access performance while maintaining reliability across process variations, temperature changes, and aging effects
2Speed
If the operation portion of the clock cycle is extended to improve memory access speed, then productivity increases, but the pre-charge portion may become insufficient compromising reliability
Solution Approach 1:
The patent dynamically changes the delay parameter to optimize the ratio between the operation portion and pre-charge portion of clock cycles. By adjusting this parameter based on actual memory performance and conditions, the system achieves optimal memory access speed while ensuring sufficient pre-charge time is allocated to maintain operation reliability, resolving the trade-off between speed and reliability
Data Source
AI summary
A method, system and product including adapting a value of a delay parameter that is utilized in an operation of a memory-cell array, wherein the delay parameter influences a ratio between an operation portion of a clock cycle and a pre-charge portion of the clock cycle, wherein writing or reading to the memory-cell array is enabled during the operation portion of the clock cycle and is disabled during the pre-charge portion of the clock cycle, wherein said adapting comprises: initializing the delay parameter with an initial value; writing a first test data into the memory-cell array; attempting to read from the memory-cell array a second test data; comparing the first test data with the second test data; and selecting a target value for the delay parameter based on said comparing.