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:
Dec. 21, 2010
Filed:
Mar. 27, 2008
Kazuo Nagatani, Kawasaki, JP;
Hiroyoshi Ishikawa, Kawasaki, JP;
Nobukazu Fudaba, Kawasaki, JP;
Hajime Hamada, Kawasaki, JP;
Tokuro Kubo, Kawasaki, JP;
Kazuo Nagatani, Kawasaki, JP;
Hiroyoshi Ishikawa, Kawasaki, JP;
Nobukazu Fudaba, Kawasaki, JP;
Hajime Hamada, Kawasaki, JP;
Tokuro Kubo, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A distortion compensation apparatus includes an amplifier for amplifying an input signal, a calculation unit for obtaining a distortion compensation coefficient of the amplifier corresponding to an amplitude level of the input signal, based on the input signal input to the amplifier and an output signal output from the amplifier, a memory for storing the distortion compensation coefficient, obtained by the calculation unit, into a write address being made to correspond to the input signal amplitude level, a distortion compensation processing unit for reading out the distortion compensation coefficient from the readout address of the memory, and for performing distortion compensation processing of the input signal using the distortion compensation coefficient, and an address generator for generating the write address and the readout address, based on the input signal amplitude level.