Invention Grant
- Patent Title: Method and apparatus for direct conversion receiver correcting direct current offset
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Application No.: US15109376Application Date: 2015-01-02
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Publication No.: US09948484B2Publication Date: 2018-04-17
- Inventor: Yi-Ju Roh , Ji-Hoon Kim , Ju-Ho Son , Yun-A Shim , Dong-Hyun Lee , Dong-Yun Jung , Sung-Tae Choi , Seung-Pyo Hong
- Applicant: Samsung Electronics Co., Ltd.
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: Jefferson IP Law, LLP
- Priority: KR10-2014-0000777 20140103
- International Application: PCT/KR2015/000023 WO 20150102
- International Announcement: WO2015/102431 WO 20150709
- Main IPC: H04L25/06
- IPC: H04L25/06 ; H04L25/10 ; H04B1/30

Abstract:
The present invention relates to a method and an apparatus for direct current offset calibration of a direct conversion receiver, a Direct Current (DC) offset calibration apparatus of a direct conversion receiver includes a plurality of variable gain amplifiers for amplifying an input signal based on a gain control value, a DC offset monitoring unit for monitoring a DC offset for an output signal of the plurality of variable gain amplifiers, a plurality of variable Digital to Analog Converters (DACs) for controlling a current applied to each of the plurality of variable gain amplifiers according to a current control code, and a DC offset cancellation unit for determining a current control code set which minimizes the DC offset value per preset gain control value, and thus the DC offset can be precisely cancelled without being affected by external factors such as a signal modulation method and heat and performance degradation of the receiver can be prevented.
Public/Granted literature
- US20160330049A1 METHOD AND APPARATUS FOR DIRECT CONVERSION RECEIVER CORRECTING DIRECT CURRENT OFFSET Public/Granted day:2016-11-10
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