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. 07, 2026
Filed:
Aug. 14, 2024
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A method of performing a failure detection on an AC input voltage includes comparing the AC input voltage with first and second reference voltages, determining that the AC input voltage is normal, if an absolute value of the AC input voltage is greater than the first reference voltage, determining that the AC input voltage has failed, if a duration of the absolute value of the AC input voltage being less than the second reference voltage is greater than a threshold duration, and determining that the AC input voltage has failed, if the absolute value of the AC input voltage is not less than the second reference voltage and not greater than the first reference voltage, and a duration of an absolute value of a change rate of the AC input voltage being less than a voltage change rate threshold is greater than a predetermined time delay.