Method and apparatus to recover from an erroneous logic state in an electronic system

摘要

An electronic system includes circuitry to detect errors in logic state in the system and to initiate corrective action when one or more errors are detected. In some embodiments, redundant information is stored within a system that is associated with an operational state of the system. If the operational state of the system is subsequently corrupted as a result of an electrical or mechanical overstress condition, resulting errors may be detected by comparing or otherwise processing the stored operational state information and the redundant information.

主权项

1. An electronic sensor system for use in an environment prone to mechanical and electrical overstress conditions, comprising:
at least one sensor element to measure one or more operational parameters of the electronic sensor system; first digital storage circuitry to store a current operational state of the electronic sensor system, wherein the current operational state information stored in the first digital circuitry can include one or more errors caused by mechanical and overstress conditions; operational logic to determine a next operational state of the electronic sensor system based, at least in part, on an input signal from the at least one sensor element; redundancy logic to generate redundant information associated with the next operational state determined by the operational logic; second digital storage circuitry to store the redundant information; and error checking logic to determine compatibility of the current operational state stored in the first digital storage circuitry with the redundant information stored in the second digital storage circuitry to determine whether the current operational state information includes the one or more errors, the error checking logic including correction logic to initiate corrective action for the electronic system if the one or more errors is detected by the error checking logic.