Multi-Phase Clock Edge Correction for Quadrature Alignment
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Solution Overview
Problem
Existing technologies face challenges in generating and correcting clock signals with multiple phases for high-speed data transmission and reception, leading to errors in clock edges that affect data integrity.
Innovation Solution
A method and device for correcting clock edges by receiving multiple clock signals, detecting errors in their rising and falling edges, and adjusting these edges based on detected errors to ensure quadrature alignment, thereby improving data transmission accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple clock signals with various phases are used for high-speed data transmission, then data transmission speed is improved, but clock edge errors occur affecting data integrity
Solution Approach 1:
The patent employs feedback mechanisms where the first clock signal serves as a reference to detect phase errors in the second, third, and fourth clock signals. The detected errors are fed back to adjust and correct the phase of subsequent clock edges, ensuring that despite high-speed transmission requirements, the clock signals maintain accurate phase relationships and data integrity is preserved.
2Reliability
If clock edges are corrected based on error detection, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The correction circuit is segmented into specialized sub-circuits, each responsible for correcting specific clock signals (second clock correction circuit, third clock correction circuit, fourth clock correction circuit). This segmentation allows each sub-circuit to handle a specific task efficiently, improving reliability while managing complexity through modular design rather than a single complex correction unit.
Solution Approach 2:
The first clock signal acts as an intermediary reference signal that mediates the phase relationship between the other clock signals. By using this intermediate reference, the system can detect and correct phase errors without requiring direct comparison between all clock pairs, simplifying the overall correction mechanism while maintaining high reliability.
3Manufacturing precision
If phase adjustment is performed sequentially based on multiple reference points, then manufacturing precision of clock phases is improved, but processing time increases
Solution Approach 1:
The system performs preliminary phase alignment by using the first clock signal to pre-establish a reference phase before correcting subsequent clock signals. The second clock is corrected first using this reference, then the third clock is corrected using both the first and second clocks as references, and finally the fourth clock is corrected using the first, second, and third clocks. This preliminary structuring of reference relationships enables efficient sequential correction without requiring iterative adjustments, reducing processing time while maintaining high precision.
Data Source
AI summary
Provided is a method of correcting a clock, the method including receiving a first clock, a second clock, a third clock, and a fourth clock, correcting each of a second rising edge of the second clock, a third rising edge of the third clock, and a fourth rising edge of the fourth clock based on a first rising edge of the first clock, and correcting each of a first falling edge of the first clock, a second falling edge of the second clock, a third falling edge of the third clock, and a fourth falling edge of the fourth clock based on a first rising edge of the first clock.