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:
Apr. 23, 2013
Filed:
May. 03, 2010
Takeshi Yoshizawa, Kawasaki, JP;
Takeshi Yoshizawa, Kawasaki, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
An overvoltage protection circuit includes a PMOS transistor Qthat is disposed between an input circuit, from which an input voltage VIN is supplied, and a systemand functions as a switch. A comparatorcompares the input voltage VIN with a predetermined reference voltage to determine the occurrence of an overvoltage. Further, the comparatoroutputs a High level as an operation signal when no overvoltage is detected. A soft switching control circuitstarts up by using the High level output from the comparatoras an enable signal, and gradually turns on the PMOS transistor Q. A sudden change of the load exerted on the circuit on the input side is suppressed by the soft start function.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile