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:
Jun. 22, 2004
Filed:
May. 24, 2002
Applicant:
Inventors:
Yoichi Okubo, Tokyo, JP;
Kiyoshi Funada, Tokyo, JP;
Masaki Suto, Tokyo, JP;
Masato Horaguchi, Tokyo, JP;
Toshio Takada, Tokyo, JP;
Naoki Hongo, Tokyo, JP;
Assignee:
Hitachi Kokusai Electric Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/26 ;
U.S. Cl.
CPC ...
H03F 1/26 ;
Abstract
A distortion reducing circuit compensates an upper side third-order distortion and a lower side third-order distortion produced by an amplifier for amplifying a fundamental signal including multiple frequency components. The distortion reducing circuit includes a second harmonic reflection coefficient regulation circuit, installed at an output side of the amplifier, for regulating reflection coefficients for multiple frequency components included in a second harmonic signal to have a constant value.