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:
Aug. 20, 2013
Filed:
May. 13, 2011
Maki Nakamura, Kanagawa, JP;
Kaoru Ishida, Kanagawa, JP;
Maki Nakamura, Kanagawa, JP;
Kaoru Ishida, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Provided is a transmission circuit capable of compensating a variation in output power caused due to a temperature change or an individual variability when the operation mode is switched without an increase in the size of the transmission circuit which switches the operation mode between a linear operation mode and a nonlinear operation mode, and capable of suppressing the deterioration of the quality of a transmission signal. In the transmission circuit, a gain setting section () sets the gain (target gain) of a variable gain amplifier (), to a value which enables the variable gain amplifier () to operate linearly and corresponds to a comparison result (output error level) obtained through comparison between the target level of the variable gain amplifier () corresponding to the set power level of the transmission signal and the power level of an output signal of the variable gain amplifier () detected by a power detection section (). The variable gain amplifier () amplifies an amplitude phase modulation signal or a phase modulation signal (phase path signal) in accordance with the target gain set by the gain setting section ().