APPARATUS AND METHOD FOR DC OFFSET CALIBRATION IN SIGNAL TRANSMISSION APPARATUS

摘要

The present invention relates to a DC offset calibration apparatus in a signal transmission apparatus, comprising: a first DC calibration unit which removes DC offset from a signal output from a current to voltage converter (IVC) using a first DC calibration value; a voltage gain controller (VGA) which amplifies the signal output from the IVC using a preset gain; a second DC calibration unit which removes the DC offset from the signal output from the IVC using a second DC calibration value; a low pass filter (LPF) which filters the signal output from the VGA corresponding to a preset bandwidth; a third DC calibration unit which removes the DC offset from the signal output from the LPF using a third DC calibration value; and a controller which determines the first DC calibration value to the third DC calibration value.