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. 28, 2012
Filed:
May. 22, 2009
Shinya Kobayashi, Kyoto, JP;
Shinya Kobayashi, Kyoto, JP;
Rohm Co., Ltd., , JP;
Abstract
A capacitor charging apparatus includes a transformer and an output capacitor which is to be charged using the current that flows through the secondary coil of the transformer. A control circuit charges the output capacitor by controlling the switching operation of a switching transistor provided on a path of the primary coil of the transformer. A voltage monitoring terminal is connected to a tap provided to the secondary coil of the transformer. A switching control unit receives a monitoring voltage that occurs at the voltage monitoring terminal, and controls the switching operation of the switching transistor according to the monitoring voltage. A protection circuit monitors the monitoring voltage. In a case in which continues to be satisfied with respect to the monitoring voltage, the switching control operation of the switching control unit for the switching transistor is stopped.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile