Mainband–Sideband Interconnect Isolation With Dual Regulators
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Solution Overview
Problem
Existing interconnect technologies for chiplet arrangements in autonomous vehicle computing systems do not adequately address freedom from interference between mainband and sideband data paths, which is crucial for ensuring reliability and safety in autonomous driving applications.
Innovation Solution
The implementation of a set of mainband and sideband data paths in the interconnect, where the mainband data paths receive constant voltage from a first voltage regulator and the sideband data paths receive constant voltage from a second voltage regulator, with a shared ground to electrically isolate these paths and prevent interference. Additionally, de-capping components are used to eliminate transient noise between the data paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If mainband and sideband data paths share common power and ground references, then device complexity is reduced, but interference between data paths increases
Solution Approach 1:
The patent divides the data transmission system into two independent segments: mainband data paths and sideband data paths. Each segment has its own dedicated voltage regulator and power source, physically separating them to prevent interference. The shared ground connection is maintained but sufficed to provide a common reference without creating electrical coupling between the two independent power domains.
2Reliability
If independent power sources are provided for mainband and sideband data paths, then freedom from interference is improved, but device complexity increases
Solution Approach 1:
The system is segmented into independent power domains where mainband data paths receive power from a first voltage regulator and sideband data paths receive power from a second voltage regulator. This segmentation ensures that failures or noise in one domain cannot propagate to the other, achieving freedom from interference.
Solution Approach 2:
A shared ground connection acts as an intermediary element that allows both independent power domains to coexist without direct electrical coupling. The ground provides a common reference potential while the independent voltage regulators prevent direct current interaction between the two data path systems.
3Object-affected harmful factors
If de-capping components are added between data paths, then transient noise is eliminated, but device complexity increases
Solution Approach 1:
De-capping components (decoupling capacitors) are introduced as intermediary elements at the interface between mainband and sideband data paths. These components filter high-frequency transient noise and voltage fluctuations, acting as a buffer that prevents noise propagation between the independent data path systems.
Data Source
AI summary
An interconnect for providing freedom from interferences can include a set of mainband data paths and a set of sideband data paths. The set of mainband data paths receive constant voltage from a first voltage regulator powered by a first power source, and the set of sideband data paths receive constant voltage from a second voltage regulator powered by a second power source.