| 摘要 |
In a printed circuit board on which a plurality of electronic components are mounted, a first electronic component having the largest number of input and output pins among the electronic components is arranged at or near the center of the printed circuit board. Wiring patterns including a signal line pattern, a first power supply pattern, and a first ground pattern almost radially arranged from the first electronic component, thereby mounting the electronic components at a high density with a high wiring efficiency.
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