Radiation-Triggered Ground Switching for Space Electronics Testing
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Solution Overview
Problem
Existing solutions for protecting electronic components in spatial systems from singular events caused by spatial radiation, such as latch-up, burnout, and single event upsets, are inadequate in ensuring deterministic avoidance of damage and do not guarantee efficient service life due to the need for component opening or thinning, which compromises heat dissipation and testing accuracy.
Innovation Solution
A test method involving a signal processing unit and protective switches connected between the ground and signal ports of sensitive electronic circuits, which detects and responds to spatial radiation by switching to ground, simulating the service life conditions with penetrating heavy ions and thermal stress without altering the component's configuration, allowing for accurate assessment of switching operations and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If component opening or thinning is performed to test sensitivity to spatial radiations, then testing accuracy is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent uses a simulation model that replicates the electrical and thermal behavior of the electronic component without physically altering it. The simulation environment copies the essential characteristics needed for radiation sensitivity testing while maintaining the component's original heat dissipation properties, thus avoiding the trade-off between testing accuracy and thermal management.
2Reliability
If protective switches are added to detect and respond to spatial radiation, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent introduces protective switches as intermediary elements that mediate between the detection of spatial radiation events and the response action. These switches act as controlled intermediaries that can rapidly isolate affected circuit sections without requiring complete system redesign, thereby enhancing reliability while managing complexity through modular protection mechanisms.
Solution Approach 2:
The protective switches are pre-configured and positioned in advance within the circuit architecture, ready to respond immediately upon detection of singular events. This preliminary arrangement eliminates the need for complex real-time decision-making during radiation events, simplifying the control logic while ensuring rapid protection response.
3Reliability
If companion circuit is integrated to monitor sensitive integrated circuit, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent integrates the companion circuit functionality directly with the sensitive integrated circuit in a unified structure. By merging the monitoring and protection functions into the original circuit design rather than adding separate external components, the solution achieves enhanced reliability while minimizing manufacturing complexity and cost through consolidation of functions.
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 method ensures a predefined service life for electronic spatial systems by accurately simulating and mitigating the effects of spatial radiation, maintaining component integrity and reliability without the need for physical alteration, thus enhancing the system's robustness and longevity.
Implementation Method 1
spatial radiations causing singular events... current pulse resulting from impact in sensitive zones of the integrated circuit, of energetic particles present in the environment
Data Source
AI summary
A testing method guaranteeing a predefined lifespan of an electronic spatial system is disclosed including an electronic circuit that is sensitive to spatial radiation, including at least one signal input port and/or at least one signal output port; a signal processing unit; an electronic spatial radiation detection unit electrically connected to the signal processing unit; and at least one protective switch electrically connected between the electrical ground of the electronic spatial system and at least one out of the signal input or signal output ports of the sensitive electronic circuit, and controlled by the signal processing unit. The signal processing unit is configured to switch the at least one protective switch to the electrical ground upon detecting an amplitude of a signal that is representative of an amount of spatial radiation greater than a predefined radiation threshold.