| 摘要 |
The invention provides a printed circuit board including a terminating structure wherein impedance matching can be established with certainty also for a long wiring line without using a discrete part as a terminating resistor. In the terminating structure, an internal wiring line (11) connected to a signal output terminal (12) of a semiconductor unit (2A) is formed with a resistance value which satisfies an impedance matching condition of a printed circuit board wiring line (13) connected to the signal output terminal (12). The terminating structure is applied to any application wherein impedance matching of a wiring line is established on a printed circuit board on which a semiconductor unit having an internal wiring line having a resistance higher than that of a wiring line on the printed circuit board is mounted. <IMAGE> |
