| 摘要 |
PROBLEM TO BE SOLVED: To enable to suppress an electromagnetic noise such as crosstalks, not only by reducing a labor for a connection of wiring, without making capacity pattern to counter with those of a front surface and a back surface. SOLUTION: For with a modular connector, in which plural terminals of one side and a plural of terminals of the other side are connected by a conductor trace of a circuit board surface corresponding respectively, a plurality of quick connection terminals are used as the plural terminals of one side, and an arrangement interval between the quick connection terminals are estranged, so that the crosstalk level of the quick connection terminals concerned is set lower than a request value. Moreover, the capacity pattern which makes a cross talk level below a request value is formed in and around at least one arranged part among terminals of one side and terminals of another side among the circuit board faces. Furthermore, this capacity pattern is formed in the front surface of the circuit board and the back surface which counters the front surface, respectively. The capacity patterns of the front surface of the circuit board and the capacity pattern of the back surface of the circuit board are formed, so that they may not have overlaps in a plan view of the front surface and the back surface of the circuit board. |
