| 摘要 |
According to such formation, a common mode noise source will be produced between a ground pattern and signal pattern parallelly formed adjacently to the signal pattern and normal mode noise sources will be produced respectively between the signal pattern and a ground plane and between ground pattern and ground plane. However, the noise from the common mode noise source will be canceled by a capacitor between the signal pattern and ground pattern and the normal mode noises produced respectively between the signal pattern and ground plane and between the ground pattern and ground plane can be absorbed into the ground plane by the capacitor between the signal pattern and ground plane and the capacitor between the signal pattern and ground plane. Also, the common mode noise flowing into the ground pattern can be more positively removed by using a line filter.
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