Memory Clock Duty Adjustment for Accurate Write 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 in clock signals, which existing technologies struggle to address effectively.
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, enabling independent control of write and read clock duties to minimize errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duty adjustment is performed using existing technologies, then some duty correction is achieved, but data reception performance is degraded due to duty distortion in clock signals
Solution Approach 1:
The patent implements a feedback mechanism where the memory device monitors its own clock signal duty cycle and communicates monitoring information to the memory controller, which then generates control signals to adjust the duty cycle. This closed-loop feedback system continuously optimizes the duty cycle to maintain accurate data reception timing, resolving the contradiction between reliability and manufacturing precision by enabling dynamic correction of duty distortion.
Solution Approach 2:
The memory device performs self-monitoring of its clock signal duty cycle through the duty monitor circuit, generating monitoring information that reflects the actual duty cycle status. This self-service approach allows the system to autonomously detect duty distortion and trigger appropriate correction actions without external intervention, improving both reliability and precision simultaneously.
2Manufacturing precision
If independent control of write and read clock duties is implemented, then duty errors are minimized, but device complexity increases
Solution Approach 1:
The patent divides the clock duty control into separate independent control paths for write operations and read operations. The write clock duty is controlled through a write duty adjuster that receives control signals based on write monitoring information, while the read clock duty is controlled through a read duty adjuster that receives control signals based on read monitoring information. This segmentation allows precise independent control of each clock's duty cycle without requiring complex interdependent control logic, thus achieving high precision while managing device complexity through modular design.
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.