DC OFFSET CANCELLER

摘要

PURPOSE: A DC offset remover is provided to conspicuously reduce a circuit area. CONSTITUTION: A filter(210) includes a first amplifier(211) and a secondary amplifier(212). The first amplifier is connected to a signal transmission path. The secondary amplifier negatively feeds back output into input with a capacitor. The filter filters only a DC(Direct Current) offset voltage signal from a transferred signal. A voltage-current converter(220) converts the DC offset voltage signal of the filter into a current signal. The voltage-current converter negatively feeds back the converted signal to the signal transmission path.