Patent ID: 8150266

Claim:
A method for performing differential signaling through parallel ports in a manner that reduces noise caused by coupling between neighboring ports, comprising: transmitting a number of differential signals from a sender to a receiver through parallel ports; wherein the parallel ports are organized in a two-dimensional grid; wherein each differential signal is transmitted through a first port and a second port that carry complementary positive and negative components of the differential signal; wherein the first and second ports of a differential pair are diagonally adjacent to each other in the two-dimensional grid; whereby because the first and second ports transition in opposite directions, coupling noise is cancelled on a neighboring port that is horizontally adjacent to the first port and vertically adjacent to the second port, and wherein a transition on the neighboring port couples equally to the first and second ports and is consequently rejected as common-mode noise by a corresponding differential receiver, wherein four differential pairs in the two-dimensional grid are arranged into a tiling pattern that can be replicated to cover the two-dimensional grid, wherein: a second component of a first pair is adjacent to the northeast of a first component of the first pair, a first component of a second pair is adjacent to the north of the first component of the first pair and is adjacent to the west of the second component of the first pair, a second component of the second pair is adjacent to the northwest of the first component of the second pair; a first component of a third pair is adjacent to the north of the first component of the second pair and is adjacent to the east of the second component of the second pair; and a second component of the third pair is adjacent to the northeast of the first component of the third pair.