Electrical Connector Cross-Talk Reduction via Intermediary Filtering
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Solution Overview
Problem
Electrical connectors experience significant cross-talk issues due to the close spacing of signal contacts, which compromises signal integrity, especially in miniaturized and high-speed electronic communications.
Innovation Solution
The electrical connector design includes a dielectric or insulative housing with signal contacts arranged in rows and columns, featuring capacitors and resistors between contact portions to reduce cross-talk, and unassigned contacts that help dissipate energy and reduce resonance effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If signal contacts are closely spaced to achieve high-density connectors, then productivity and device miniaturization are improved, but cross-talk between adjacent signal contacts increases compromising signal integrity
Solution Approach 1:
The patent introduces intermediary elements (ground contacts, shielding structures, and filtering components) positioned between adjacent signal contacts to mediate and reduce electromagnetic interference. These intermediaries act as barriers that prevent direct coupling between aggressor and victim signal contacts, thereby reducing cross-talk while maintaining high contact density.
Solution Approach 2:
The patent applies different structural configurations to different regions of the connector. Specifically, alternating patterns of ground contacts and signal contacts are used in different columns and rows, and varying contact geometries are employed in different locations to optimize signal integrity locally while maintaining overall high density.
2Volume of moving object
If signal contacts are closely spaced, then the connector size is reduced, but cross-talk interference increases
Solution Approach 1:
Ground contacts and shielding structures are positioned as intermediary elements between closely spaced signal contacts. These intermediaries create electromagnetic barriers that prevent interference while maintaining compact connector dimensions.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by stacking multiple rows and columns of contacts with varying patterns. Ground contacts are positioned in alternating columns and rows, creating vertical and horizontal separation dimensions that reduce cross-talk without increasing the overall connector footprint.
3Reliability
If capacitors and resistors are added to reduce cross-talk, then signal integrity is improved, but device complexity increases
Solution Approach 1:
The patent combines filtering functions (capacitors and resistors) directly into the contact structures themselves rather than adding separate external filtering components. The capacitive and resistive elements are integrated into the contact geometry and arrangement, achieving signal integrity improvement without proportionally increasing overall device complexity.
Solution Approach 2:
The ground contacts and structural elements serve multiple functions: they provide electrical grounding, create shielding barriers, establish reference planes, and work with the capacitive and resistive elements to filter interference. This multi-functionality reduces the need for separate dedicated components for each function.
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
This configuration effectively minimizes cross-talk between adjacent signal contacts, improving signal integrity and reducing insertion loss spikes, thereby enhancing the performance of high-density connectors.
Implementation Method 1
a respective capacitor electrically coupled between the first and second portions
Implementation Method 2
a resistor electrically coupled between the first and second portions
Data Source
AI summary
An electrical connector includes a plurality of leadframe assembly, each having a leadframe housing and a plurality of contacts carried by the leadframe housing. The electrical connector includes at least one unassigned electrical contact that includes a resistor.