METHOD AND APPARATUS FOR LOW POWER CHIP-TO-CHIP COMMUNICATIONS WITH CONSTRAINED ISI RATIO

摘要

An efficient communications apparatus is described for a vector signaling code to transport data and optionally a clocking signal between integrated circuit devices. Methods of designing such apparatus and their associated codes based on a new metric herein called the “ISI Ratio” are described which permit higher communications speed, lower system power consumption, and reduced implementation complexity.

主权项

1. A method comprising:
receiving a set of input signals; generating symbols of a normalized-gain codeword based on a weighted sum of a set of subchannels, each subchannel weighted with a corresponding input signal, wherein the set of subchannels correspond to rows of a set of rows selected from an orthogonal matrix, each row of the set of rows (i) mutually orthogonal and (ii) orthogonal to an all-one row; and transmitting the symbols of the normalized-gain codeword on a multi-wire bus.