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. 14, 2001
Filed:
Aug. 11, 2000
Minoru Sudo, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A synchronous rectifying type switching regular circuit operable in a high efficiency is obtained, while a reverse current flowing through a coil is not used to charge a power supply. In a synchronous rectifying type switching regulator circuit for alternately turning ON/OFF a first switch element for controlling a current of a coil employed in the switching regulator and a second switch element connected parallel to a commutation diode, a capacitor is added to an input of the switching regulator circuit; a third switch element is interposed between a power supply such as a battery and the capacitor; and when the first switch element is turned ON, the third switch element is turned ON, whereas when the first switch element is turned OFF, the third switch element is turned OFF.