Clock Phase Recovery for High-Speed Data Strobe Synchronization
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Solution Overview
Problem
In electronic appliances, the increasing operation speed leads to synchronization issues between clock signals and data strobe signals due to differences in signal paths and characteristics, causing phase mismatches across operation units.
Innovation Solution
A phase detection device comprising a clock divider, a recoverer, and a phase detector that divides clock signals, generates a recovered clock signal with the same frequency, and synchronizes phases with data strobe signals to adjust signal generation times, ensuring synchronized operation across units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If operation speed is increased, then productivity is improved, but phase synchronization between clock signals and data strobe signals deteriorates
Solution Approach 1:
The patent changes the timing parameters of clock signals by dividing them into multiple divided clock signals with different phases (e.g., 0°, 90°, 180°, 270°). This allows the system to operate at high speeds while maintaining synchronization by selecting the appropriate phase that aligns with data strobe signals, thus resolving the contradiction between high operation speed and phase synchronization reliability.
Solution Approach 2:
The patent dynamically adjusts the phase selection based on detection results. The phase detection device identifies the optimal phase relationship between divided clock signals and data strobe signals, and the system adapts its operation accordingly. This dynamic adjustment enables high-speed operation while maintaining reliable synchronization under varying conditions.
2Adaptability or versatility
If signal paths are extended to connect operation units, then adaptability is improved, but phase mismatch increases
Solution Approach 1:
The patent segments the clock signal into multiple divided clock signals with different phases. This segmentation allows each signal path to be optimized independently while maintaining overall synchronization. By having multiple phase options, the system can compensate for path length differences and maintain precise phase alignment across extended signal paths.
Solution Approach 2:
The phase detection device acts as an intermediary that measures and identifies phase differences between divided clock signals and data strobe signals. Based on these measurements, the system selects the appropriate phase combination to achieve synchronization, thus mediating the phase mismatch issue caused by extended signal paths.
Data Source
AI summary
A phase detection device includes a clock divider configured to divide a clock signal and generate a plurality of divided clock signals, a recoverer configured to generate a recovered clock signal having substantially the same frequency as the clock signal based on the plurality of divided clock signals, and a phase detector configured to detect a phase of the recovered clock signal in response to a data strobe signal.