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:
Mar. 16, 2010
Filed:
Feb. 17, 2009
Naoki Hongo, Kodaira, JP;
Naoki Hongo, Kodaira, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
A predistorter for correcting distortion caused by a memory effect in amplifying a signal by an amplifier is provided. In the memory PDprovided to the predistorter, the level detection meansdetects the level of the signal, the coefficient output meansoutputs the coefficient corresponding to the detected level, the delay meansdelays the output coefficient, the difference detection meansdetects the difference between the output coefficient and the delayed coefficient, the multiplication meansmultiplies the detected difference with the signal, and the combination meanscombines the result of the multiplication and the signal. Thus, the result of the combination is output to the amplifier.