| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a detection sensor for suppressing influence of high-frequency noises, without lowering its detection sensitivity. <P>SOLUTION: Since a stacked high-loss inductor 26 is arranged in a signal line L, a CPU 23 can be made to read the level of potential V3 from which high-frequency components are removed. Moreover, the level of the potential V3 can be prevented from increasing by influence of the high-frequency noises, and consequently precise object detection can be performed on the basis of a common threshold value, no matter whether there is influence of the high-frequency noises, since the CPU 23 is made to read changes in the level of potential V2 on the output side of the high-loss inductor 26. <P>COPYRIGHT: (C)2004,JPO</p> |
