Printed-circuit board for high-speed communication

摘要

A multi-pin connector (3) arranged to connect a signal line on a backboard (1) side and a signal line on a daughter board (2) side has open pins (4 to 9) where the signal lines are not connected. In order to prevent transmission losses of the signal lines caused by these open pins (4 to 9), terminating resistances (10) are connected to both ends of the open pins (4 to 9), and the sides of the terminating resistances (10) opposite to the open pins (4 to 9) are connected to the ground or a power supply.