A 3×3.8Gb/s four-wire high speed I/O link based on CDMA-like crosstalk cancellation

A signaling technique realizing three differential links over four wires is proposed. The technique uses code division multiple access (CDMA) principles to cancel the crosstalk between the links. A 3times3.8 Gb/s, 10
^-12
BER, prototype IC built in 90 nm CMOS is described and measurement results are presented.