Patent ID: 8532752
Filing Date: 2013-09-10
Classification: A61B,H03F

Abstract:
1. A biosignal amplifying device comprising: an operational amplifier (op-amp) including a first input terminal and a second input terminal; a capacitor load including a first capacitor which is connected with the first input terminal of the op-amp, and in which a first voltage is inputted from a first electrode, and a second capacitor which is connected with the second input terminal of the op-amp, and in which a second voltage is inputted from a second electrode; a feedback capacitor load including a first feedback capacitor coupled to the first input terminal and an output terminal, and a second feedback capacitor connected with the second input terminal; a feedback resistor load including a first feedback resistor coupled to the first input terminal and the output terminal, and a second feedback resistor coupled to the second input terminal; and a direct current (DC) offset voltage (V wherein a capacitance of the first capacitor and second capacitor is controllable to perform low pass filtering of an inputted biosignal, and a resistance of the first feedback resistor and second feedback resistor is controllable to perform high pass filtering of the inputted biosignal.