| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a biosignal measuring instrument appropriately setting a low-pass interception frequency even if increasing a gain of a measuring amplifier to be installed on the rear surface of a detection electrode after reducing the size of the detection electrode. <P>SOLUTION: A muscle electric potential outputted from an active shield line 14 is integrated by a resistance R3, a capacitor C1 and an operational amplifier 16 and set to a reference voltage of the measuring amplifier 13 via the active shield line 14. This constitution dispenses with a capacitor from an electrode rear surface 12 so as to reduce the weight and miniaturize the detection electrode 11 and independently set the gain G of the measuring amplifier 13 by the resistance R1 and the low-pass interception frequency fc by the capacitor C1 and the resistance R3, respectively. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
