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. 11, 2008
Filed:
Mar. 08, 2005
Mitsuru Tanabe, Katano, JP;
Koichiro Tanaka, Takarazuka, JP;
Noriaki Saito, Machida, JP;
Panasonic Corporation, Osaka, JP;
Abstract
g(x) Storing means stores a correction function y=g(x) corresponding to the distortion of a high frequency power amplifier as a function of a voltage x provided to a power supply terminal of the high frequency power amplifier. Operating means receives the correction function g(x) and a complex vector modulation signal z provided from modulation signal generating means, then causes an inverse function gto operate on the absolute value and the phase of the complex vector modulation signal z having undergone polar coordinate conversion, and thereby outputs z'=g(z). This data is provided to the high frequency power amplifier. Further, triangular wave storing means is provided for storing a triangular wave having the same amplitude as that of the modulation signal. Either the triangular wave signal outputted from the triangular wave storing means or the modulation signal z′ is selectively provided to the high frequency power amplifier.