Patent ID: 8063480
Filing Date: 2011-11-22
Classification: H01L,H05K

Abstract:
1. A printed board including a GND pattern and a power supply pattern, the printed board comprising: an IC that includes an I/O buffer circuit and a core circuit, a first capacitor connected to a connecting path between the first power supply terminal and a power supply pattern and a connecting path between the first GND terminal and the GND pattern; a second capacitor connected to a connecting path between the second power supply terminal and the power supply pattern and a connecting path between the second GND terminal and the GND pattern; and a first suppressing unit that suppresses a high-frequency potential variation generated by an operation of the core circuit, wherein the second power supply terminal is connected to the power supply pattern, and the second GND terminal is connected to the GND pattern, and wherein the first suppressing unit is connected to a connecting path between the power supply pattern and a connecting part of the first power supply terminal and the first capacitor, in the connecting path between the first power supply terminal and the power supply pattern.