Circular Optical Transceiver Layout for Signal Integrity
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Solution Overview
Problem
Traditional network devices with optical or copper ports face challenges due to long electrical signal traces, high power consumption, and inadequate cooling, which affect signal integrity and increase heat generation.
Innovation Solution
The proposed solution involves positioning optical transceiver modules around an integrated circuit (ASIC) on a printed circuit board (PCB) in a semi-circular or circular pattern, reducing trace lengths and eliminating the need for retimers and high-power serdes. This configuration also includes a non-linear faceplate with increased air inlet openings for improved cooling and a power plug attachment for efficient power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical transceiver modules are positioned at the front faceplate extending to the ASIC, then signal transmission is achieved, but electrical signal traces become excessively long causing signal integrity issues and high power consumption
Solution Approach 1:
The patent transitions from a traditional linear front-faceplate-to-ASIC arrangement to a circular/circular-arc layout where optical modules are positioned around the periphery of the PCB with the ASIC at the center. This dimensional reconfiguration reduces trace lengths by utilizing radial connections from the center ASIC to the peripheral modules, fundamentally changing the spatial relationship between components.
Solution Approach 2:
The patent employs a circular or circular-arc arrangement of optical transceiver modules around the central ASIC, replacing the traditional straight-line or rectangular layout. This curved/circular configuration optimizes the geometric relationship between the center point (ASIC) and surrounding modules, minimizing the average trace length while maintaining signal integrity.
2Reliability
If traditional optical cages with retimers are used, then signal integrity is maintained over extended traces, but power consumption increases significantly
Solution Approach 1:
The patent removes retimers from the system by reducing trace lengths to a manageable level, eliminating the need for intermediate signal regeneration components. This extraction of unnecessary components directly reduces power consumption while maintaining signal integrity through the shortened electrical paths.
Solution Approach 2:
By reconfiguring the layout from a linear extension to a circular arrangement, the patent achieves shorter trace lengths that eliminate the need for retimers, thereby reducing power consumption without compromising signal integrity.
3Ease of manufacture
If optical modules are arranged in a linear fashion on the faceplate, then manufacturing is simplified, but cooling efficiency is inadequate due to heat generation
Solution Approach 1:
The circular arrangement of optical modules around the ASIC creates a distributed heat source pattern that improves thermal management. This curved layout allows for better airflow patterns and heat dissipation compared to linear arrangements, while still maintaining manufacturing feasibility through standardized PCB routing patterns.
Data Source
AI summary
A device is provided that includes a printed circuit board and an integrated circuit that is installed on the printed circuit board. A plurality of optical transceiver modules are positioned on the printed circuit board around three or more sides of the integrated circuit. The plurality of optical transceiver modules are to be in operable communication with the integrated circuit. A faceplate is installed that has multiple face portions that expose receptacles for the plurality of optical transceiver modules around the integrated circuit.