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:
Feb. 04, 2003
Filed:
Nov. 15, 2001
Yoshiaki Honda, Kanagawa, JP;
Yukio Odaka, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A capacitor charging apparatus includes a DC/DC converter for stepping up the voltage of a battery and charging the capacitor; a detection circuit that determines whether a primary current of the DC/DC converter reaches a predetermined limit current; a control circuit that controls the DC/DC converter according to a detection signal received from the detection circuit; and a battery-information detection circuit that detects battery information of the battery. The control circuit performs a predetermined calculation using the battery information received from the battery-information detection circuit to determine the predetermined limit current and to vary the primary current of the DC/DC converter so as to control the DC/DC converter each time the capacitor is charged by the DC/DC converter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile