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公开(公告)号：EP2232725A1
公开(公告)日：2010-09-29
申请号：EP08848303.7
申请日：2008-11-05
发明人： LEE, Hee Choul , PARK, Chan Hong
摘要： Techniques for writing to registers associated with MIMO signal paths are disclosed. In an embodiment, a controller writes a common value to all registers corresponding to the same operational parameter or parameters, for all signal paths in the MIMO transmitter or receiver. The controller then updates the register in any signal path whose operational paramater differs from the common value, by accumulating a value to the value already in the register, or by replacing the value already in the register with a different value.
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2.发明公开DIRECT CURRENT (DC) OFFSET CORRECTION USING ANALOG-TO-DIGITAL CONVERSION 审中-公开直流（DC）偏移校正使用模拟 - 数字转换
公开(公告)号：EP2332302A1
公开(公告)日：2011-06-15
申请号：EP09790955.0
申请日：2009-07-29
发明人： AHRARI, Bahman , LEE, Hee Choul , KO, Jin-Su , LEE, Sang-Oh
CPC分类号： H04L25/061 , H04L27/364
摘要： Techniques for reducing or eliminating DC (direct current) offset in transmitters are disclosed. An apparatus for DC offset reduction may include a converter, a digital engine, and a plurality of programmable current supplies. The converter is configured to provide digital representations of a plurality of DC currents associated, respectively, with a plurality of differential signal legs. The digital engine is configured to receive the digital representations and to produce instructions for generating compensating currents for the plurality of differential signal legs based on comparisons, respectively, between each of the digital representations and a calibration current. The programmable current supplies correspond, respectively, to the differential signal legs. The current supplies are configured to inject the compensating currents into the differential signal legs, respectively, to reduce DC offset between the differential signal legs, based upon the instructions. The instructions allow one-shot DC offset correction, instead of successive approximation for DC offset correction.
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