The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2020
Filed:
Mar. 09, 2018
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Joshua C. Swenson, Rockford, IL (US);
HAMILTON SUNDSTAND CORPORATION, Charlotte, NC (US);
Abstract
An apparatus that includes a single event latchup (SEL) recovery circuit, a microprocessor operatively connected with the SEL recovery circuit, and an output maintenance circuit that maintains a state of the microprocessor prior to a power cycle of the microprocessor. The apparatus is configured to detect a SEL event or other fault via a watchdog circuit, initiate a power cycle of the microprocessor, retain a latch state from the microprocessor, and determine whether the microprocessor was restarted due to an SEL event. Responsive to determining that the microprocessor has failed to restart due to a persistent fault, the apparatus determines whether a prepower cycle limit is reached within a predetermined span of time, and selectively provide power to a load based on the latch state and the power cycle limit determination.