PCB Signal Path Impedance Testing with TDR Automation
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Solution Overview
Problem
Current methods for testing characteristic impedance of signal path routings on printed circuit boards (PCBs) are not prompt or accurate enough, affecting product quality.
Innovation Solution
A system and method utilizing a time domain reflectometer (TDR) connected to a computer with specialized modules for initializing, obtaining, testing, and analyzing impedance data, including receiving test information, initializing the TDR, determining valid status parameters, obtaining and comparing test data against standards, and generating reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional impedance testing methods are used, then testing can be performed, but the testing speed and accuracy are insufficient
Solution Approach 1:
The system performs preliminary actions by pre-configuring the TDR instrument parameters, pre-loading test data formats, and pre-establishing the testing environment before actual impedance measurements begin. This preparation work is done in advance to enable faster and more accurate measurements during the actual testing phase.
Solution Approach 2:
The patent replaces traditional manual or mechanical impedance testing methods with an automated computer-controlled TDR system. The computer automatically controls the TDR instrument, processes test data, and generates reports, substituting manual operations with automated electronic systems to improve both speed and accuracy.
2Productivity
If manual impedance testing methods are used, then testing can be performed, but automation and efficiency are insufficient
Solution Approach 1:
The computer system performs multiple functions including controlling the TDR instrument, acquiring test data, processing measurements, analyzing results, and generating reports. This multi-functional automated system replaces multiple separate manual operations, significantly improving productivity and automation level simultaneously.
Solution Approach 2:
The system enables self-service by allowing the computer to automatically control the TDR instrument, process test data, and generate reports without requiring continuous manual intervention. The automated system serves itself by handling the entire testing workflow from initiation to completion, improving both efficiency and automation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables prompt and accurate testing of characteristic impedance, ensuring product quality by providing reliable test data and reports for signal path routings on PCBs.
Implementation Method 1
a time domain reflectometer (TDR) connected to a computer with specialized modules for initializing, obtaining, testing, and analyzing impedance data
Data Source
AI summary
A method for testing a characteristic impedance of a signal path routing of a printed circuit board (PCB) controls the test device to test a characteristic impedance of the signal path routing of the PCB to get test data of the signal path routing of the PCB. The method further analyzes the test data of the signal path routing of the PCB get analysis results, generate a test report for storing the test data of each signal path routing of the PCB and the analysis results if all signal path routings of the PCB have been tested.