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. 21, 2001
Filed:
Apr. 22, 1999
Masahiro Sakagawa, Higashihiroshima, JP;
Akihiro Ohshita, Higashihiroshima, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
To reduce a power loss and elongate the service life of a battery in a power supply circuit for a widely variable power-consuming load. In a device with a dry battery and a rechargeable battery, the rechargeable battery supplies the power while its output voltage is higher than a 3.4V-voltage increased voltage by a voltage increasing circuit. When the output voltage of the rechargeable battery decreases lower than 3.4V, the voltage increasing circuit operates and the dry battery works as a power supply. The power voltage increased by the voltage increasing circuit through a choke coil is fed to respective voltage decreasing circuits. The current is also fed to recharge the rechargeable battery when the output voltage of the choke coil is higher than the output voltage of the rechargeable battery. When the load is increased by the operation of a pickup, the power stored in the rechargeable battery together with the power from the dry battery after increased to 3.4 V by the voltage increasing circuit is supplied to respective voltage decreasing circuits.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile