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. 24, 2015
Filed:
Feb. 01, 2011
Mitsutomo Yoshinaga, Saitama-Ken, JP;
Mitsutomo Yoshinaga, Saitama-Ken, JP;
Sanken Electric Co., Ltd., Niiza-shi, Saitama, JP;
Abstract
An active snubber circuit for a switching power supply, in which a main switching element repeatedly operates an on-off operation so that current intermittently flows in a primary coil, has a capacitor for surge voltage absorption, a sub-switching element and a sub-control circuit controlling the sub-switching element. A circuit in which the capacitor for surge voltage absorption and the sub-switching element are connected in series is connected in parallel with the primary coil, and the sub-control circuit turns on the sub-switching element for a predetermined time period just after the main switching element is off.