| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small-sized mobile type electronic apparatus and a mobile type electronic clock which can prevent malfunction due to the influence of noise, regarding a circuit board wherein constraints are placed in a wiring layout by the design of a product, and the wiring pattern of a micronic signal becomes long. <P>SOLUTION: Wiring including a sensor module mounting pattern 5, a wiring pattern 6 for a sensor signal, a shield pattern 7, etc. exists on the single side surface of the circuit board 1. The micronic signal of several μV to several mV flows in the wiring pattern 6 for a sensor signal. The shield pattern 7 surrounds the wiring pattern 6 for the sensor signal over the whole length. In a wiring layer below a region where the wiring pattern 6 for the sensor signal and the shield pattern 7 are formed, the shield pattern of a sensor rear face is formed on the surface opposite to the whole region. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
