Memory Write-Clock Duty Adjustment for Distortion Control
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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 in clock signals, which existing technologies struggle to address effectively.
Innovation Solution
A memory device and system that include a clock receiver, duty monitor, and duty adjuster to monitor and adjust the duty cycle of write and read clocks, providing feedback to the memory controller for optimal duty control, thereby minimizing duty errors and improving data reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duty monitoring and adjustment mechanisms are added to memory devices, then data reception performance is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the duty monitor continuously monitors the duty cycle of clock signals and provides monitoring information to the memory controller. The memory controller then generates duty control signals based on this feedback to adjust the duty cycle, creating a closed-loop control system that improves data reception performance through continuous optimization.
Solution Approach 2:
The memory device performs self-diagnosis and self-adjustment of clock duty cycles through integrated duty monitors and duty adjusters. The system automatically detects duty errors and corrects them without external intervention, enabling the device to maintain optimal performance autonomously.
2Manufacturing precision
If multiple duty adjusters are implemented in the memory device, then duty cycle control precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the duty adjustment function into multiple independent duty adjusters, each responsible for specific clock signals (write clock, read clock). This segmentation allows precise control of each clock's duty cycle independently, while the modular structure manages complexity by localizing adjustment functions to specific circuit blocks.
Solution Approach 2:
Different duty adjusters are applied to different clock signals based on their specific requirements. The write clock path has dedicated duty adjusters, and the read clock path has separate duty adjusters, allowing each clock domain to be optimized independently with appropriate precision levels.
3Productivity
If duty monitoring is performed on multiple clock signals, then overall system performance is improved, but use of energy increases
Solution Approach 1:
The duty monitor is designed as a multi-functional component that can monitor multiple clock signals (write clock, read clock) using the same basic monitoring circuitry. This universal monitoring capability allows comprehensive duty cycle management across all clock domains without requiring separate monitoring systems for each signal.
Solution Approach 2:
The system performs duty monitoring on essential clock signals that have the greatest impact on data reception performance, while potentially reducing monitoring intensity or frequency for less critical signals. This selective monitoring approach balances system performance improvement with energy consumption constraints.
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.