PRINTED CIRCUIT BOARD AND PRINTED WIRING BOARD

摘要

A memory system is provided with a motherboard, and a memory controller and a plurality memory devices mounted on the motherboard. The motherboard comprises a unicursal-shape main wiring, and branch wirings branched from the main wiring to the respective memory devices. Further, the motherboard comprises an open stub wiring branched from a connecting point between a start end and a branch point of the main wiring. Thus, a ringing of a waveform of a signal received by a receiving circuit can be suppressed irrespective of a wiring length of the branch wiring.

主权项

1. A printed circuit board comprising:
a printed wiring board; and a first receiving circuit and a second receiving circuit, which are respectively mounted on the printed wiring board, and each of which is configured to receive a signal transmitted from a transmitting circuit through the printed wiring board, wherein the printed wiring board includes at least a main wiring of which a start end is electrically connected to the transmitting circuit, a first branch wiring of which one end is electrically connected to a first branch point on the main wiring and of which the other end is electrically connected to the first receiving circuit, a second branch wiring of which one end is electrically connected to a second branch point on the main wiring farther from the start end than the first branch point, and of which the other end is electrically connected to the second receiving circuit, and a first open stub wiring Which includes a first connecting end electrically connected to a first connecting point on the main wiring between the start end and the first branch point, and a first open end opposite to the first connecting end.