| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrocardiographic detector capable of rationally suppressing various high frequency noises by a simple constitution. <P>SOLUTION: In the signal supply parts 2 and 3 of an electrocardiographic sensor, an electrode conductor part 15 connected to the non-inverse input terminal (+) of an operational amplifier 22 and a parasitic conductor part 30 connected to the inverse input terminal (-) of the operational amplifier 22 becomes almost the same in potential in a voltage follower circuit 20 to guard the leakage current from the electrode conductor part 15 to the ground. Since the capacitor Cs connected to the inverse input terminal (-) and non-inverse input terminal (+) of the operational amplifier 22 in parallel is formed by the parasitic capacity produced between the electrode conductor part 15 and the parasitic conductor part 30, a high frequency signal of cut-off frequency or above is prevented from being outputted from a voltage follower circuit 20 by the impedance thereof. By this constitution, the same effect can be obtained without separately providing an exclusive low-pass filter. <P>COPYRIGHT: (C)2013,JPO&INPIT |
