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:
Sep. 11, 2001
Filed:
Mar. 31, 1999
Shinichi Fujita, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
Transformer has a primary connected via a power supply switch to a supply plug, and main power supply circuitry for supplying electric power to principal circuitry is connected to a secondary of the transformer. Auxiliary power supply circuitry for powering auxiliary circuitry, which requires backup power during an OFF state of the power supply switch, includes a rectifier circuit for rectifying electric power that is extracted via certified condensers from nodes connecting to the plug, and a stabilized power supply. This arrangement provides a power supply circuit structure which, during the OFF state of the power supply switch, can supply stable backup power with a minimized power loss, as well as well-performing electric equipment using such a power supply circuit structure.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile