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    • 2. 发明公开
    • METHOD AND APPARATUS FOR DIRECT CONVERSION RECEIVER CORRECTING DIRECT CURRENT OFFSET
    • VERFAHREN UND VORRICHTUNGFÜRDIREKTUMWANDUNGSEMPFÄNGERZUR KORREKTUR VON GLEICHSTROM-OFFSET
    • EP3091702A4
    • 2017-09-06
    • EP15733140
    • 2015-01-02
    • SAMSUNG ELECTRONICS CO LTD
    • ROH YI-JUKIM JI-HOONSON JU-HOSHIM YUN-ALEE DONG-HYUNJUNG DONG-YUNCHOI SUNG-TAEHONG SEUNG-PYO
    • H04B1/30H04L25/06
    • H04L25/06H03D2200/0047H04B1/30H04B2001/305
    • 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.
    • 本发明涉及一种用于直接转换接收器的直流偏移校准的方法和设备,直接转换接收器的直流(DC)偏移校准设备包括多个可变增益放大器,用于放大基于 增益控制值; DC偏移监视单元,用于监视多个可变增益放大器的输出信号的DC偏移;多个可变数模转换器(DAC),用于控制施加到多个可变增益中的每一个的电流 以及DC偏移消除单元,用于确定使每个预设增益控制值的DC偏移值最小化的电流控制码组,从而可以精确地取消DC偏移而不受外部因素的影响,例如 可以防止接收器的信号调制方法和热量和性能下降。