| 摘要 |
PROBLEM TO BE SOLVED: To enable reducing the occupied area of a resonance part capable of cutting off a plurality of high-frequency components and to reduce EMI caused by a digital signal.SOLUTION: A printed circuit board 500 includes a printed wiring board 100 and a transmission circuit 200 mounted on the printed wiring board 100. The printed wiring board 100 has a signal conductor pattern 111 and a resonance part 120 resonating at a plurality of resonance frequencies. The resonance part 120 has a ground conductor pattern 121 connected to a ground terminal 202 of the transmission circuit 200; a plurality of conductor patterns 131, 132, and 133 parallelly arranged with one another with a space so as to face the ground conductor pattern 121 via an insulator layer; connecting conductors 141 and 142 connecting the conductor patterns adjacent to each other; and a via conductor 123 connecting the conductor pattern 131 and the signal conductor pattern 111. |
