Patent ID: 7523246

Claim:
A system comprising: a circuit board having a controller chip, wherein the controller chip provides a first signal and a second signal; and a memory module including: a substrate having a first side and a second side, wherein the first side is positioned opposite to the second side, a first signal line to carry the first signal, and a second signal line to carry the second signal, wherein the first signal line and the second signal line each have a respective first end coupled to the controller chip by a respective edge finger and a respective second end coupled to a termination, and a first synchronous memory device disposed on the first side of the substrate, and a second synchronous memory device disposed on the second side of the substrate, wherein the first synchronous memory device and the second synchronous memory device are connected to the first signal line and the second signal line, wherein the first signal arrives at the first synchronous memory device before arriving at the second synchronous memory device and the first signal arrives at the second synchronous memory device before reaching the termination coupled to the second end of the first signal line, and wherein the second signal arrives at the first synchronous memory device before arriving at the second synchronous memory device and the second signal arrives at the second synchronous memory device before reaching the termination coupled to the second end of the second signal line.