Memory Write-Clock Duty Adjustment for Data Reception Stability
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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 duty monitoring and adjustment operations are performed, then data reception performance is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback by having the memory device monitor its own clock duty cycle and communicate monitoring information back to the memory controller, which then generates control signals to adjust the duty cycle. This closed-loop feedback mechanism enables automatic optimization of data reception performance without manual intervention.
Solution Approach 2:
The memory device performs self-diagnosis and self-adjustment by monitoring its own clock duty cycle and generating or receiving control signals to correct duty errors. This self-service capability reduces the need for external intervention and simplifies the overall system operation.
2Manufacturing precision
If duty monitoring information is transmitted to memory controller, then clock duty optimization is improved, but loss of time increases
Solution Approach 1:
The patent performs preliminary action by having the memory device continuously monitor clock duty cycle and prepare monitoring information in advance. When duty errors are detected, the adjustment process can begin immediately without waiting for error manifestation, reducing overall adjustment time.
Solution Approach 2:
The patent replaces mechanical or manual duty cycle adjustment with electronic monitoring and control signal transmission. The digital communication of monitoring information and control signals enables rapid duty cycle optimization without physical intervention or lengthy calibration processes.
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.