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. 13, 2011
Filed:
Oct. 18, 2010
Kenichi Shimamoto, Tokyo, JP;
Hisanori Namie, Tokyo, JP;
Kenichi Shimamoto, Tokyo, JP;
Hisanori Namie, Tokyo, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
The RF power amplifier apparatus has an RF power amplifier and a power-supply circuit. The power-supply circuit controls the level of a source voltage supplied to the RF power amplifier in response to the level of a power-control signal. A sensing resistance produces a sense signal Vsen corresponding to a source current with respect to a source voltage. The current-control unit controls the source current Iin response to the sense signal Vsen. When Vsen coincides with an allowable sense signal level Vsh corresponding to a source current allowable level I(Max), the current-control unit controls the source current Ito a limit current smaller than the allowable level I(Max). Preferably, the limit current is a shutdown current when a shutdown switch is in an OFF state. Thus, the draining of the battery of a mobile-phone terminal can be reduced even when an impedance mismatch condition lasts for a long time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile