Cascaded Phase Synchronization with Feedback Phase Correction
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Solution Overview
Problem
In phase synchronization devices, the increasing number of elements leads to difficulties in maintaining equal output phases due to phase rotation amounts caused by path length differences and wire delays, making accurate phase correction challenging, especially under environmental changes.
Innovation Solution
A phase synchronization device with cascaded elements, each equipped with a phase interpolator, phase shifter, phase comparator, and control circuit, where the phase interpolator generates a signal intermediate between input signals, and the phase shifter adjusts the phase to equalize output phases across elements, with the control circuit controlling the phase shift based on detected differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of elements is increased, then the productivity is improved, but the manufacturing precision deteriorates due to phase rotation amounts caused by path length differences and wire delays
Solution Approach 1:
The patent divides the phase correction function into multiple independent elements, where each element has its own phase interpolator, phase shifter, and control circuit. This segmentation allows each element to independently correct its phase deviations caused by path length differences and wire delays, thereby maintaining output phase equality across all elements even as the total number of elements increases.
Solution Approach 2:
The patent implements a feedback mechanism where each element detects its own phase difference between the reference signal and the signal from the previous stage, then uses this detected phase difference to control the phase shifter. This closed-loop feedback enables automatic compensation for phase rotation amounts caused by manufacturing variations and wire delays, maintaining synchronization across all elements.
2Reliability
If environmental conditions change, then the stability of the object's composition deteriorates, but the phase synchronization must be maintained
Solution Approach 1:
The patent uses dynamic phase adjustment through voltage-controlled oscillators and phase shifters that can continuously adapt their output phases in response to changing environmental conditions. The control circuits monitor phase differences in real-time and dynamically adjust the phase shift amounts to compensate for environmental variations, thereby maintaining phase synchronization stability despite changes in temperature, humidity, or other environmental factors.
Data Source
AI summary
A third signal having a phase intermediate between a first signal based on a reference signal and a second signal with a phase shifted by an element of a previous stage is generated, a signal obtained by shifting the phase of the third signal by a first phase shill amount is output as a second signal to an element of a subsequent stage, a phase difference between the third signal and a fourth signal obtained by shifting the phase of a first signal output from the element of the subsequent stage by the first phase shift amount is detected, and the first phase shift amount is controlled on the basis of the detected phase difference.