Connector-Cable Module Pad Layout for Crosstalk Cancellation
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Solution Overview
Problem
Existing connector-cable modules experience non-negligible noise due to crosstalk between signal lines, which affects the reliable transmission of differential signals.
Innovation Solution
A connector-cable module configuration featuring a multicore cable with stranded signal lines and strategically positioned pads on a board, where the third pad's gravity center is between the first and second pads' gravity centers, cancels crosstalk between the first and third signals and between the second and third signals, reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If signal lines are arranged in a conventional connector-cable module, then the connector can be connected to an electronic device regardless of vertical orientation, but non-negligible noise is generated due to crosstalk between signal lines
Solution Approach 1:
The patent applies asymmetry by strategically positioning the third pad's gravity center between the first and second pads' gravity centers along the line connecting them. This asymmetric arrangement of signal lines and pads creates an uneven distribution that cancels out crosstalk effects between differential signal lines, thereby reducing noise while maintaining multi-orientation connectivity capability
2Ease of manufacture
If the third pad is positioned independently without specific geometric constraints, then layout flexibility is maintained, but crosstalk cancellation is not achieved
Solution Approach 1:
The patent applies parameter changes by defining specific geometric parameters for pad positioning: the third pad's gravity center must lie between the first and second pads' gravity centers along the line connecting them. This parameter-based constraint transforms the pad layout from a flexible but unreliable arrangement to a constrained configuration that actively cancels crosstalk, thereby improving signal transmission quality while maintaining manufacturability
Data Source
AI summary
A connector-cable module includes a multicore cable including first, second, and third signal lines; and a connector connected to one end of the multicore cable and including a board and first, second, and third pads connected to the first, second, and third signal lines and provided on the board. A first signal and a second signal transmitted through the first and second signal lines form a differential signal. The connector is configured such that when a line passes through a first gravity center of the first pad and a second gravity center of the second pad, a foot of a perpendicular drawn from a third gravity center of the third pad to the line is located between the first gravity center and the second gravity center.