Memory Clock Duty Feedback for Reliable Data Reception
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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 monitors and adjusts the duty cycle of write and read clocks, providing feedback to the memory controller to minimize duty errors and optimize clock signals for improved data synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duty monitoring and adjustment mechanisms are implemented, then data reception performance is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the duty monitor continuously monitors the duty cycle of the write clock 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 while managing complexity through systematic feedback processing.
Solution Approach 2:
The duty adjuster automatically adjusts the duty cycle of the write clock based on monitoring information from the duty monitor, without requiring external intervention. This self-service mechanism allows the system to autonomously correct duty cycle deviations, improving reliability while reducing the need for complex external control mechanisms.
2Manufacturing precision
If multiple duty adjusters are deployed throughout the clock tree, then clock signal optimization is improved, but device complexity increases
Solution Approach 1:
The patent divides the clock distribution system into multiple segments, placing duty adjusters at different locations within the clock tree (including at the input and at various intermediate points). Each duty adjuster independently optimizes the clock signal in its specific segment, allowing for localized precision without requiring complete system redesign.
Solution Approach 2:
Different duty adjusters are strategically positioned at different locations in the clock tree where duty distortion occurs. Each adjuster is configured to address the specific characteristics of its local clock distribution path, providing optimized correction tailored to local conditions rather than applying a uniform solution throughout the entire system.
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.