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:
Oct. 22, 2013
Filed:
Apr. 01, 2010
Ryo Kitamura, Kanagawa, JP;
Takahito Miyazaki, Kyoto, JP;
Ryo Kitamura, Kanagawa, JP;
Takahito Miyazaki, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Provided is a transmission circuit which allows smooth switching of the operation mode when switching the operation mode of the transmission circuit. A power amplifierincludes: a first input terminal to which a direct-current voltage or a voltage in accordance with an amplitude signal M is supplied; a second input terminal to which an output signal from a first variable gain amplifieror an output signal from a second variable gain amplifieris inputted; and a third input terminal to which an output signal from a first bias circuitor an output signal from a second bias circuitis inputted. A control sectionswitches the operation mode of the transmission circuit so that at least one of the first input terminal, the second input terminal, and the third input terminal of the power amplifier is prevented from being in a no input state.