发明公开
EP3091702A4 METHOD AND APPARATUS FOR DIRECT CONVERSION RECEIVER CORRECTING DIRECT CURRENT OFFSET
审中-公开
VERFAHREN UND VORRICHTUNGFÜRDIREKTUMWANDUNGSEMPFÄNGERZUR KORREKTUR VON GLEICHSTROM-OFFSET
- 专利标题: METHOD AND APPARATUS FOR DIRECT CONVERSION RECEIVER CORRECTING DIRECT CURRENT OFFSET
- 专利标题(中): VERFAHREN UND VORRICHTUNGFÜRDIREKTUMWANDUNGSEMPFÄNGERZUR KORREKTUR VON GLEICHSTROM-OFFSET
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申请号: EP15733140申请日: 2015-01-02
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公开(公告)号: EP3091702A4公开(公告)日: 2017-09-06
- 发明人: ROH YI-JU , KIM JI-HOON , SON JU-HO , SHIM YUN-A , LEE DONG-HYUN , JUNG DONG-YUN , CHOI SUNG-TAE , HONG SEUNG-PYO
- 申请人: SAMSUNG ELECTRONICS CO LTD
- 专利权人: SAMSUNG ELECTRONICS CO LTD
- 当前专利权人: SAMSUNG ELECTRONICS CO LTD
- 优先权: KR20140000777 2014-01-03
- 主分类号: H04B1/30
- IPC分类号: H04B1/30 ; H04L25/06
摘要:
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.
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