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. 29, 2004
Filed:
May. 16, 2003
Junghwan Lee, Seongnam-si, KR;
Bo-Eun Kim, Yongin-si, KR;
Jinkyu Lim, Seongnam-si, KR;
Minsu Jeong, Anyang-si, KR;
Bonkee Kim, Yongin-si, KR;
Integrant Technologies Inc., Kyunggi-do, KR;
Abstract
A signal processing apparatus for correcting DC offset in a communication system is provided. The signal processing apparatus comprises: a low noise amplifier (LNA) ; a mixer for mixing the output from said LNA with local oscillation signal LO; a first offset correction amplifier for amplifying output signal from said mixer and for eliminating DC offset in the output signal in accordance with first control signal Vc ; a second offset correction amplifier for amplifying output signal from said first offset correction amplifier and for eliminating DC offset in the output signal in accordance with second control signal Vc ; a variable gain amplifier for amplifying output from said second offset correction amplifier wherein gain is controlled such that power level of output be maintained to a desired value; offset calibration mean for calibrating DC offset in output from said variable gain amplifier ; and offset correction mean for outputting the first and second control signals Vc and Vc in accordance with the output from said offset calibration mean , to eliminate DC offset in the output from said variable gain amplifier