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. 01, 2009
Filed:
Apr. 01, 2008
Taizo Ito, Kodaira, JP;
Yoichi Okubo, Tokorozawa, JP;
Junya Dosaka, Hamura, JP;
Toshio Nojima, Sapporo, JP;
Taizo Ito, Kodaira, JP;
Yoichi Okubo, Tokorozawa, JP;
Junya Dosaka, Hamura, JP;
Toshio Nojima, Sapporo, JP;
Hitachi Kokusai Electric, Inc., Tokyo, JP;
Abstract
A distortion compensation apparatus includes distortion generating means for generating distortions to compensate for a distortion generated in an amplifier. The distortion generating means includes a nonlinear circuithaving an input/output expansion characteristic as a circuit which generates a distortion of the lowest odd order as a compensation target and also includes a nonlinear circuithaving an input/output saturation characteristic as a circuit which generates a distortion of another odd order as a compensation target.