Cross talk suppression in a bidirectional bus

A bidirectional data bus for connecting a processor and a system memory of a data processing system, comprising:

• a first line driven by a pair of drivers;
• a first pair of impedance elements connected between the first line and a second line of the bus;
• a second pair of impedance elements connected between the first line and a third line of the bus;
• wherein the impedance of each of the drivers is approximately equal to (υc0)−1, wherein c0 is the self-capacitance of the first line and υ is the speed of light through a dielectric in which the lines are embedded.

A method suppressing cross talk in a bidirectional bus, comprising:

• driving a first line of the bus with a first signal by a first driver wherein the first driver produces a current I in the first line;
• and, responsive thereto:
• drawing a current J from a second line adjacent to the first line with a current source, wherein J/I is approximately equal to k/c, k is the capacitive coupling per unit length between the first and second lines, and c is approximately c0+2k, where c0 is the self-capacitance of the first line;
• and
• terminating the first line with an impedance element between the first and second lines, wherein the impedance of the impedance element is approximately equal to (υk)−1 wherein k is the capacitive coupling per unit length between the first and second lines and υ is the speed of light in a dielectric in which the first and second lines are located.