The present invention relates to a biosignal measurement device for accurately extracting a biosignal waveform from which common mode noise has been removed through signal correction even when an impedance unbalance between electrodes occurs, comprising: two channels for detecting biopotentials of the human body by means of two electrodes a biosignal extraction unit, which comprises two sets of detection means for amplifying the biopotentials respectively inputted through the two channels and then performing a differential calculation, and acquires a biosignal by selectively selecting output signals of the two sets of detection means and an impedance correction means for adjusting an amplification factor of an amplifier such that the power of common mode noise mixed with the biosignal decreases.La présente invention concerne un dispositif de mesure de biosignal permettant dextraire avec précision une forme donde de biosignal à partir de laquelle a été éliminé le bruit de mode commun par correction du signal même lors de la présence dun déséquilibre dimpédance entre les électrodes, comprenant : deux canaux permettant de détecter des biopotentiels du corps humain au moyen de deux électrodes une unité dextraction de biosignal, qui comprend deux ensembles de moyens de détection permettant damplifier les biopotentiels entrés respectivement à travers les deux canaux et deffectuer ensuite un calcul différentiel, et acquiert un biosignal en choisissant sélectivement des signaux de sortie des deux ensembles de moyens de détection et un moyen de correction dimpédance permettant dajuster un facteur damplification dun amplificateur de sorte que la puissance du bruit de mode commun mélangé au biosignal diminue.본 발명은 전극 간에 임피던스 불평형이 발생하더라도 신호 보정하여 동상잡음을 제거한 생체신호 파형을 정확하게 추출하는 생체신호 계측장치에 관한 것으로서, 2개의 전극으로 인체의 생체전위를 검출하는 2개의 채널 2개의 채널로 입력받는 생체전위를 각각 증폭한 후 차동 연산하는 검출수단을 2개조로 구비하고, 2개조 검출수단의 출력 신호를 선택적으로 채택하여 생체신호를 획득하는 생체신호 추출부 생체신호에 섞인 동상잡음의 파워가 작아지도록 증폭기의 증폭도를 조절하는 임피던스 보정수단 을 포함하
