| 摘要 |
<P>PROBLEM TO BE SOLVED: To shield a digital signal pattern while preventing crosstalk between an analog signal output pattern and the digital signal pattern without impairing flexibility of a printed wiring board. <P>SOLUTION: A print circuit board includes a first layer on which a land is formed, a second layer on which the analog signal pattern and a first ground pattern are wired, a third layer on which the digital signal pattern and a second ground pattern are wired, and a fourth layer on which a third ground pattern is wired. The first to the fourth layers are stacked such that the digital signal pattern is sandwiched between the first ground pattern and the third ground pattern, the analog signal pattern and digital signal pattern are arranged without overlapping each other, and the analog signal pattern and second ground pattern are arranged so as to overlap each other. <P>COPYRIGHT: (C)2009,JPO&INPIT |
