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:
Aug. 05, 2008
Filed:
Jul. 24, 2006
Koichi Sugama, Kawasaki, JP;
Noboru Shimizu, Kawasaki, JP;
Tsutomu Chikazawa, Kawasaki, JP;
Ryuji Kayama, Kawasaki, JP;
Kenichi Yajima, Kawasaki, JP;
Yukio Katayanagi, Kawasaki, JP;
Takashi Kaiga, Kawasaki, JP;
Koichi Sugama, Kawasaki, JP;
Noboru Shimizu, Kawasaki, JP;
Tsutomu Chikazawa, Kawasaki, JP;
Ryuji Kayama, Kawasaki, JP;
Kenichi Yajima, Kawasaki, JP;
Yukio Katayanagi, Kawasaki, JP;
Takashi Kaiga, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In a power supply monitoring device, a power supply voltage monitoring portion always monitors a power supply voltage supplied to a monitored circuit and outputs a voltage reduction signal when detecting that the power supply voltage is reduced below a predetermined threshold (e.g. a second voltage higher than a voltage guaranteeing a normal operation of the monitored circuit and lower than a rated voltage). A monitoring controller having received the voltage reduction signal determines whether or not an operational malfunction has occurred in the monitored circuit by comparing operation data of the monitored circuit with reference data of the monitoring controller itself. Also, the monitoring controller executes recovery processing (reset processing or reference data overwrite processing) suitable for the monitored circuit referring to a prestored recovery processing type specific to the monitored circuit when detecting an operational malfunction of the monitored circuit.