Electrocardiogram sensor and signal processing method thereof

ECG sensor according to the present invention, to remove the DC offset of the ECG (electrocardiogram) signals received from the measuring electrode, and adjust the gain amplification value, the gain amplification value is adjusted analog front end (analog front end for outputting the ECG signal ); And the analog front end, comprising: a digital signal processor for detecting the information to analyze and process based on the ECG signal received from the analog front end to a predetermined algorithm, and outputs the detected information, wherein the measuring electrode after removal from the DC offsets of the ECG signal is received during a first interval, a second reception control the gain amplification value at the same time to eliminate the DC offsets of the ECG signal during the interval.