A novel DC-offset cancelling circuit for DCR

Abstract

The paper describes a novel DC-offset canceling structure for a direct-conversion receiver (DCR). The proposed structure uses an I/Q tuning loop to remove DC-offset. The I/Q mismatch issue is discussed and, accordingly, a solution to suppress I/Q mismatch effects is adopted. A variable bandwidth technique is employed to accelerate the loop acquisition when… (More)
DOI: 10.1109/ISCAS.2005.1464608

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