| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the occurrence of abnormality in internal equipment caused by noise generated on a power source line. <P>SOLUTION: A 5V line supplied to a main substrate 31 is provided with a noise filter circuit 162a. An input stage capacitor 161a is disposed between the input side of the noise filter circuit 162a and the ground level; and a capacitor 163a is disposed between the output side of the noise filter circuit 162a and the ground level. A double L-type noise-eliminating circuit is thus formed of the capacitor 163a and the noise filter circuit 162a. Further, a voltage stabilizing capacitor 164a is disposed between a signal line in a subsequent stage of the double L-type noise-eliminating circuit and the ground level. With this configuration, noise can be effectively reduced. <P>COPYRIGHT: (C)2012,JPO&INPIT |
