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. 02, 2010
Filed:
Jul. 10, 2008
Heon Kook Kwon, Daejeon, KR;
Joon Hyung Kim, Daejeon, KR;
Byung Su Kang, Daejeon, KR;
Kwang Chun Lee, Daejeon, KR;
Heon Kook Kwon, Daejeon, KR;
Joon Hyung Kim, Daejeon, KR;
Byung Su Kang, Daejeon, KR;
Kwang Chun Lee, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
The present invention relates to an apparatus and a method for compensating carrier feedthrough in a quadrature modulation system. In order to suppress the carrier feedthrough, and minimize and compensate the carrier feedthrough, differences of baseband differential input DC voltages in an in-phase as well as a quadrature-phase are simultaneously adjusted to 0 or a certain slight voltage difference by a simple analog circuit. Therefore, it is possible to suppress carrier feedthrough using a simple analog type apparatus for compensating carrier feedthrough, and simply achieve an apparatus for carrier feedthrough using a variety of quadrature modulators.