Differential Pair Transmission Line Error Detection
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Solution Overview
Problem
Current methods for examining differential pair transmission lines on printed circuit boards are inadequate as they do not provide immediate feedback on measurement errors, making it difficult to identify and correct abnormalities during the measurement process.
Innovation Solution
A method using a processor to capture and analyze insertion losses of differential signal lines, calculate maximum error ratios, and output warning signals when thresholds are exceeded, along with converting insertion losses into mixed mode losses and using linear regression to further evaluate data accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement data is analyzed only after measurement completion, then post-measurement analysis can be performed, but immediate detection of measurement errors is not achieved
Solution Approach 1:
The patent applies preliminary action by performing error detection and warning signal generation during the measurement process itself, rather than waiting until after measurement completion. The processor continuously monitors measurement data and compares it against reference data, generating warning signals immediately when anomalies are detected, thus enabling real-time error identification without delaying the measurement workflow.
Solution Approach 2:
The patent implements feedback by creating a closed-loop measurement system where measurement results are immediately compared against reference data, and warning signals are fed back to the operator in real-time. This feedback mechanism allows operators to adjust measurement conditions or reperform measurements while the measurement process is still active, rather than discovering errors only after completion.
2Measurement precision
If detailed analysis methods are applied to all measurement data, then measurement accuracy is improved, but measurement and processing time increases
Solution Approach 1:
The patent applies partial action by performing detailed error analysis only on measurement data that shows anomalies when compared against reference data. Instead of applying comprehensive analysis to all measurement data regardless of quality, the system first performs a quick comparison check, and only triggers detailed linear regression analysis and error calculation when the initial comparison indicates potential issues, thus saving processing time for normal measurements.
Solution Approach 2:
The patent segments the measurement analysis process into multiple stages: initial data capture, reference comparison, anomaly detection, and detailed error analysis. This segmentation allows the system to quickly process most measurements through the first three stages and only apply the computationally intensive detailed analysis to cases where it is actually needed, improving overall measurement efficiency while maintaining accuracy for problematic data.
Data Source
AI summary
A method for examining differential pair transmission lines, performed by a processor, comprising: capturing a plurality of first insertion losses of a first signal line within a frequency range and a plurality of second insertion losses of a second signal line within the frequency range, wherein the first signal line and the second signal line are configured to transmit a pair of differential signals; calculating a plurality of maximum error ratios between the first insertion losses and the second insertion losses within the frequency range; determining whether any one of the maximum error ratios is greater than or equal to an upper threshold; outputting a warning signal when the processor determines one of the maximum error ratios is greater than or equal to the upper threshold; and ending the method when the processor determines each one of the maximum error ratios is smaller than the upper threshold.