Patent ID: 8493833

Claim:
A communication system comprising: a printed circuit board, the printed circuit board including a plurality of channels; a plurality of receivers coupled to outputs of the plurality of channels; a plurality of drivers coupled to inputs of the plurality of channels, wherein a slew rate for each of the plurality drivers is dependent on transitions of at least one neighboring driver; and circuitry coupled to the plurality of drivers and within each of the plurality of channels, wherein a slew rate driver coupled to a victim channel compensates for cross talk from at least one neighboring aggressor channels by adjusting its slew rate based upon a signal received from the circuitry of the victim channel, wherein the circuitry of the victim channel comprises: a register for receiving the input signal and providing a delayed signal; a first adder for receiving the delayed signal and the input signal and providing a first transition signal; a second adder for receiving a transition signals from the at least two aggressor channels and providing a second transition signal; and a multiplier for receiving the first transition signal and the second transition signal, wherein if the product of the transition signal and the second transition signal is negative then the multiplier sends a signal to the slew rate driver coupled to the victim channel to pick a slew rate coefficient.