Apparatus for amplifying ECG based on two-electrode

摘要

The present invention relates to a two-electrode-based electrocardiogram signal amplifying apparatus capable of more stably measuring an electrocardiogram while using only two electrodes, which includes two electrodes in contact with a subject's body; An instrumentation amplifier having both input ends connected to each of the two electrodes, and differentially amplifying a biosignal input through the input both ends to obtain and output an amplifying unit output; A control unit for outputting a first signal when the in-phase mode signal applied to both ends of the input is greater than or equal to a preset upper limit value, and outputting a second signal when the in-phase mode signal applied to both ends of the input is less than or equal to a preset lower limit value; And two charge pumps connected in parallel to each of the input ends to charge the in-phase mode signal to the capacitor in response to the first signal or to discharge the charging voltage of the capacitor to both ends of the input in response to the second signal. Circuitry.