DC OFFSET VOLTAGE CORRECTION APPARATUS AND METHOD IN RFID SYSTEM

摘要

PURPOSE: A method and device for correcting a DC offset voltage in an RFID system are provided to increase a signal process speed by adopting a digital average filter. CONSTITUTION: A matched filter(330) corrects the distortion domain of an input signal. An FIR(Finite Impulse Response) digital average filter(340) outputs a signal corrected by the matched filter by limiting a frequency band. A low frequency digital average filter(350) outputs the signal corrected by the matched filter by matching with the inputted clock signal. An IIR(Infinite Impulse Response) filter determines the DC offset value of the input signal. A signal code determiner(370) determines the code of the DC offset value.