| 摘要 |
A print circuit board includes a first layer on which a land is formed, a second layer on which an analog signal pattern and a first ground pattern are wired, a third layer on which a digital signal pattern and a second ground pattern are wired, and a fourth layer on which a third ground pattern is wired. The digital signal pattern is vertically 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 on the projection plane. The analog signal pattern and second ground pattern are arranged so as to overlap each other. |
