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:
Dec. 15, 2009
Filed:
Jan. 16, 2007
Kuo-fan Lin, Taoyuan City, Taoyuan Hsien, TW;
Kuo-Fan Lin, Taoyuan City, Taoyuan Hsien, TW;
SPI Electronic Co., Ltd., Taoyuan Hsien, TW;
Other;
Abstract
The present invention discloses an active peak voltage-limiting clamp circuit, which comprises a primary switch unit and a secondary switch unit that are used to control the coil current of a transformer, wherein a signal acquisition unit, a zero-point decision unit, a feedback unit and a pulse control unit are used to control the turn-on periods of the primary switch unit and the secondary switch unit; thus, the turn-on period of the primary switch unit is separated from the turn-on period of the secondary switch unit, and a buffer interval for the transient voltage variation is formed therebetween.