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:
Sep. 05, 2011
Filed:
Aug. 03, 2010
Ta-yung Yang, Milpitas, CA (US);
Chien-yuan Lin, Pan-Chiao, TW;
Ta-Yung Yang, Milpitas, CA (US);
Chien-Yuan Lin, Pan-Chiao, TW;
System General Corp., Taipei Hsien, TW;
Abstract
The present invention provides a method and a control circuit to detect an input voltage for the control and protections of a power converter. It includes a current sense circuit for generating a current signal in response to a switching current of a transformer. A detection circuit is coupled to sense the current signal for generating a slope signal in response to a slope of the current signal. A protection circuit is further developed to control the switching signal in accordance with the slope signal. The level of the slope signal iscorrectedcorrelatedto the input voltage of the power converter.