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:
Nov. 25, 2008
Filed:
Mar. 02, 2006
Mamoru Arayashiki, Yokohama, JP;
Mamoru Arayashiki, Yokohama, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Polar modulation transmission apparatus capable of suppressing power loss of a battery supply line to a high-frequency power amplifier regardless of whether transmission power is high or low is provided. Operation control section () performing control in such a manner that a battery voltage (S) converted as a result of operation of a DC/DC converter () is applied to amplitude signal amplifying section () or halting operation of the DC/DC converter () in such a manner that battery voltage (S) is applied directly from the battery () based on a transmission power control signal (S). As a result, when transmission power is low, power loss at the amplitude signal amplifying section () is suppressed by DC/DC converter (), unnecessary operation of DC/DC converter () is halted when transmission power is high, and power loss can be suppressed regardless of whether transmission power is high or low.