| 摘要 |
PROBLEM TO BE SOLVED: To provide a practical structure of wiring board having the structure of a power supply system for reducing noise due to fluctuation of current, and an electronic apparatus employing it. SOLUTION: Conductors are formed on both sides of a dielectric (not shown), and a power supply pattern 4 and a ground pattern 3 are arranged in stripe through a gap to form both sides patterns (ground 3, power supply 4, and signals 12-15) plane-symmetrically to the center of the dielectric. Currents of the power supply and ground patterns are controlled by assigning different power supplies to both sides and making cuts 9, 11, respectively, in the stripe patterns of the ground 3 and power supply 4. Inductance is reduced utilizing mutual inductance. A signal channel is prepared in the gap of power supply system pattern and differential wiring is made at both sides as required. |
