Memory Device Duty Cycle Adjustment for Data Reception
Find Innovative SolutionsGenerate Solutions
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 for improved data synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duty adjustment is performed using feedback control, then data reception performance is improved, but device complexity increases due to additional monitoring and control circuits
Solution Approach 1:
The patent implements feedback control by monitoring the duty cycle of clock signals and adjusting it based on the monitored values. A duty cycle monitor circuit measures the actual duty cycle, and this information is fed back to a duty cycle adjuster that modifies the clock signal to correct deviations, thereby maintaining optimal data reception performance.
Solution Approach 2:
The memory device performs self-adjustment of clock duty cycles through internal monitoring and control mechanisms. The duty cycle monitor and adjuster circuits automatically detect and correct duty cycle errors without external intervention, enabling the system to maintain optimal performance autonomously.
2Manufacturing precision
If multiple duty adjusters are deployed for different clock signals, then clock duty accuracy is improved, but device complexity increases
Solution Approach 1:
The patent divides the clock signal distribution into multiple segments, each with its own duty cycle adjuster. This allows independent optimization of duty cycles for different clock signals (e.g., write clock, read clock) that are used in different operational modes, ensuring high accuracy for each specific clock application.
Solution Approach 2:
Different duty cycle adjustment mechanisms are applied to different clock signals based on their specific requirements. The write clock path receives duty adjustment optimized for write operations, while the read clock path receives adjustment optimized for read operations, ensuring locally optimal performance for each function.
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.