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:
Mar. 31, 2026
Filed:
Aug. 30, 2024
Rohm Co., Ltd., Kyoto, JP;
Takashi Fujimura, Kyoto, JP;
Takashi Kira, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
A monitoring circuit includes first and second oscillators, first and second frequency dividers, first and second counters, a determination portion, and an identification portion. The first and second frequency dividers respectively divide frequencies of first and second clock signals outputted from the first and second oscillators, respectively. The first and second counters respectively count the numbers of clocks of the second and first clock signals at first and second numbers of periods of first and second frequency-divided signals outputted from the first and second frequency dividers, respectively. The determination portion determines, based on results of counting by the first and second counters, whether or not an abnormality has occurred in either of the first and second clock signals. The identification portion identifies, at the occurrence of an abnormality in either of the first and second clock signals, which of the first and second clock signals is in an abnormal state.