Memory Write Clock Duty Feedback for Duty Error Correction
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Solution Overview
Problem
Memory devices face challenges in efficiently managing duty errors of write and read clocks, leading to degraded data reception performance due to duty distortion during data transfer operations.
Innovation Solution
A memory device with a clock receiver, duty monitor, and duty adjuster that receives a write clock, monitors its duty cycle, and adjusts it in response to a control signal, while also providing monitoring information to the memory controller to optimize clock duty cycles and minimize errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory device operates with a fixed duty cycle clock signal, then the system operation is simple, but duty errors accumulate leading to degraded data reception performance
Solution Approach 1:
The patent implements a feedback mechanism where the memory device monitors its own clock signal duty cycle and communicates duty error information to the memory controller. The memory controller then generates duty control signals to adjust the clock duty cycle, creating a closed-loop system that continuously corrects duty errors to maintain optimal data reception performance.
Solution Approach 2:
The memory device performs self-diagnosis by monitoring its own clock signal characteristics and generating duty error information. This self-service approach allows the system to automatically detect and report duty cycle deviations without external intervention, enabling proactive correction before performance degradation occurs.
2Reliability
If the memory device monitors and adjusts clock duty cycle, then data reception performance improves, but the device complexity increases
Solution Approach 1:
The patent divides the duty cycle adjustment functionality into separate modular components: a duty monitor that detects duty errors, a control interface that communicates with the memory controller, and a duty adjuster that applies corrections. This segmentation allows each component to perform its specific function efficiently while maintaining overall system manageability and flexibility.
Data Source
AI summary
A memory device includes a clock receiver configured to receive, from a memory controller, a write clock that is used to receive write data during a data write operation, a duty monitor configured to generate first monitoring information by monitoring a duty of the write clock, and a duty adjuster configured to adjust the duty of the write clock in response to a duty control signal and output an adjusted write clock. The memory device provides the first monitoring information to the memory controller, and receives the duty control signal, generated using the first monitoring information, from the memory controller.