Failure Insertion Fuse Circuit for High-Bandwidth Bus Protection
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Solution Overview
Problem
Existing failure insertion units (FIUs) risk damaging bus or network interfaces due to overvoltages when used in systems with high bandwidths, especially when combined with Ethernet, as conventional protective circuits degrade signal integrity and are not feasible.
Innovation Solution
A failure insertion unit with a fuse circuit that protects the bus or network interface by only activating when a fault is switched, and includes a protective circuit within the FIU that can be selectively activated based on the interface type, with a switching device to disconnect the interface before applying fault voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional protective circuit is integrated into the bus or network interface to protect against overvoltages, then the interface is protected from damage, but signal integrity is degraded and the solution is not feasible for high-bandwidth systems
Solution Approach 1:
The patent introduces a fuse circuit as an intermediary protective element positioned between the failure insertion unit and the bus/network interface. This fuse circuit acts as a mediator that protects the interface from overvoltages without degrading signal integrity, as it only activates during fault conditions rather than continuously interfering with normal signal transmission.
Solution Approach 2:
The protective function is segmented into a separate fuse circuit module that can be selectively activated. Instead of integrating protection continuously into the interface, the protection is divided into a standalone fuse circuit that is only engaged when fault conditions are detected, allowing normal high-bandwidth communication to proceed without interference.
2Reliability
If the fuse circuit is always active to protect the interface, then the interface is continuously protected, but production costs increase and signal integrity is compromised
Solution Approach 1:
The fuse circuit is designed to be dynamically controllable, switching between active and inactive states based on operational requirements. During normal operation, the fuse circuit can be deactivated to reduce complexity and cost, while activating only when fault conditions are detected or when the failure insertion unit is engaged, providing protection only when necessary.
Solution Approach 2:
Protection is applied locally and selectively only where and when needed - specifically at the failure insertion unit interface rather than throughout the entire bus interface system. This localized protection approach reduces overall system complexity and production costs while maintaining adequate protection where failure insertion operations occur.
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
Enables the use of FIUs in high-bandwidth systems without damaging interfaces, maintaining signal integrity and reducing production costs by only activating protection when necessary, and supporting multiple interface types.
Implementation Method 1
with a fuse circuit that protects a bus or network interface, connected to the failure insertion unit, from voltages that are greater than the maximum voltage for which the bus or network interface is designed
Data Source
AI summary
A failure insertion unit for connection to an object under test connected to a bus or network interface, wherein the object under test can be subjected by means of the failure insertion unit to fault voltages that are greater than the maximum voltage for which the bus or network interface is designed, with a fuse circuit which protects a bus or network interface connected to the failure insertion unit from voltages that are greater than the maximum voltage for which the bus or network interface is designed. This provides a way to be able to use failure insertion units even in systems that work with buses with high bandwidths without the risk of damaging bus or network interfaces due to overvoltages.