Pluggable Module Interposer Assembly Signal Integrity
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Solution Overview
Problem
Conventional communication systems face issues with multiple interfaces between conductors and host circuit boards, leading to increased costs and electrical performance problems such as reflections, noise, and attenuation, particularly at high data rates.
Innovation Solution
A communication system is designed with an interposer assembly that electrically connects a pluggable module to a host circuit board, using a cable assembly with signal and ground conductors, and a receptacle assembly with a cage member for shielding, reducing the number of interfaces and improving signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple interfaces (circuit card, electrical communication connector) are used to connect conductors to host circuit board, then the system provides modular connectivity and adaptability, but electrical performance deteriorates due to reflections, noise, and attenuation at high data rates
Solution Approach 1:
The patent extracts and eliminates the intermediate circuit card and electrical communication connector from the signal path. The cable conductors are directly connected to the host circuit board contact pads, removing the problematic interfaces that cause reflections, noise, and attenuation while preserving modular connectivity through the pluggable module design.
Solution Approach 2:
The patent merges the cable assembly contacts directly with the host circuit board contact pads through the interposer assembly, eliminating the separate electrical communication connector and circuit card interfaces. This consolidation reduces the number of interfaces in the signal path while maintaining adaptability.
2Adaptability or versatility
If multiple interfaces (circuit card, electrical communication connector) are used, then modular connectivity is achieved, but system cost increases
Solution Approach 1:
The patent extracts and removes the expensive intermediate components (electrical communication connector, circuit card) from the system. By directly connecting cable conductors to host circuit board contact pads through the interposer assembly, the design eliminates unnecessary components and reduces system cost while maintaining modular connectivity.
Solution Approach 2:
The patent merges multiple separate components into a more integrated structure where the interposer assembly directly connects cable conductors to host circuit board contact pads. This consolidation eliminates the need for separate electrical communication connectors and circuit cards, reducing device complexity and cost.
3Ease of operation
If conventional receptacle assembly with electrical communication connector is used, then connectivity is established, but signal quality deteriorates due to multiple interfaces causing reflections and noise
Solution Approach 1:
The patent extracts and eliminates the electrical communication connector and circuit card from the signal path. Cable conductors are directly connected to host circuit board contact pads, removing the sources of reflections and noise while maintaining ease of connectivity establishment through the pluggable module design.
Solution Approach 2:
The interposer assembly serves as a simplified intermediary structure that directly connects cable conductors to host circuit board contact pads without introducing additional interfaces. This mediator eliminates the problematic electrical communication connector while maintaining connectivity functionality.
Data Source
AI summary
A communication system includes a host circuit board and an interposer assembly coupled to the host circuit board having an interposer substrate including an upper surface and a lower surface. The interposer assembly has host circuit board contacts electrically connected to contact pads of the host circuit board and cable assembly contacts coupled to a pluggable module. The pluggable module includes a mating interface along a bottom of the pluggable module facing the interposer assembly. The pluggable module includes a cable assembly having a cable at the cable end. The cable has a signal conductor and a ground conductor being electrically connected to corresponding cable assembly contacts of the interposer assembly at the upper surface of the interposer substrate.