APPARATUS FOR CANCELING DC OFFSET IN UHF RFID READER, RFID READER HAVING THE SAME AND METHOD FOR CANCELING DC OFFSET IN UHF RFID READER

摘要

PURPOSE: An apparatus for removing DC offset in a UHF(Ultra High Frequency) RFID(Radio Frequency ID) reader, an RFID reader including the same, and a method for removing the DC offset are provided to reduce reader errors while effectively removing a DC offset signal. CONSTITUTION: A first DC(Direct Current) offset remover(510) offers an in-phase channel signal in which DC offset is removed and receives the phase channel signal according to a sampling control signal and a sampling clock signal. A second DC offset sremover(520) offers a quadrature-phase channel signal in which the DC offset is removed receives the quadrature-phase channel signal.