SEU and SEFI fault tolerant computer

Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability

Reexamination Certificate

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Details

C714S017000, C714S822000

Reexamination Certificate

active

10767477

ABSTRACT:
A non-hardened processor is made fault tolerant to SEUs and SEFIs. A processor is provided utilizing time redundancy to detect and respond to SEUs. Comparison circuitry is provided in a radiation hardened module to provide special redundancy with the need to run additional processors. Additionally, a hardened SEFI circuit is provided to periodically send a signal to the process which, in the case of a processor not in the SEFI state, initiates production by the processor of a “correct” response. If the correct response is not received within a particular time window, the SEFI circuit initiates progressively severe actions until a reset is achieved.

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