Serial Data Transfer Margin Increase via Dynamic Clock Phase Adjustment
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Solution Overview
Problem
Existing serial data transfer systems face increased data errors due to decreased sampling windows resulting from faster data transfer rates, which reduces the margin for sampling accuracy.
Innovation Solution
The implementation of a system with a first and second latch, and a control circuit that compares outputs to calculate error values, modifies the clock phase using high and reduced gain steps to detect and adjust the data transfer timing, thereby enhancing the sampling margin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the period between bit periods is decreased to increase data transfer rates, then the data transfer rate is improved, but the sampling window decreases resulting in increased data errors
Solution Approach 1:
The patent implements dynamic phase adjustment of the sampling clock through a control circuit that continuously monitors data errors and modifies the clock phase in real-time. This dynamic adaptation allows the system to maintain optimal sampling timing despite the reduced sampling window, resolving the contradiction between high transfer rates and sampling accuracy.
Solution Approach 2:
The system employs a feedback mechanism where data errors are detected and fed back to the control circuit, which then adjusts the sampling clock phase accordingly. This closed-loop control enables the system to compensate for timing deviations caused by the decreased sampling window, maintaining reliability at high transfer rates.
2Productivity
If the sampling window is decreased to achieve higher transfer rates, then the data transfer rate is improved, but the margin for sampling accuracy decreases
Solution Approach 1:
The control circuit performs preliminary phase adjustments before critical sampling errors occur by continuously monitoring error patterns and proactively modifying the clock phase. This preventive approach maintains adequate sampling margin even with the reduced window duration.
Solution Approach 2:
The system dynamically changes the phase parameter of the sampling clock based on detected error patterns and eye transition positions. By adjusting this critical parameter in real-time, the system optimizes the sampling point within the reduced window, preserving measurement precision despite the smaller margin.
3Measurement precision
If the clock phase is adjusted dynamically to optimize sampling, then sampling accuracy is improved, but the system complexity increases
Solution Approach 1:
The control circuit performs self-adjustment by autonomously detecting eye transitions and automatically modifying the clock phase without external intervention. This self-service capability achieves high sampling accuracy while minimizing the need for complex external control mechanisms.
Solution Approach 2:
The patent introduces an intermediary control circuit that acts as a mediator between the data path and clock distribution. This intermediary component simplifies the overall system architecture by centralizing the phase adjustment function in a dedicated module rather than distributing complexity throughout the system.
Data Source
AI summary
Embodiments are related to systems and methods for data processing, and more particularly to systems and methods for enhancing margin in a serial data transfer.