Wide-band common mode reduction in high speed differential traces

A method, comprising:

• providing, on a printed circuit board, a pair of differential signal traces including a positive signal trace and a negative signal trace;
• providing, between the positive signal trace and the negative signal trace, a first rejection trace;
• detecting, by the first rejection trace, a first common mode (CM) signal present on the differential signal traces, wherein the first CM signal is centered at a first frequency;
• reducing, by the first rejection trace, the first CM signal on the differential signal traces;
• providing, between the positive signal trace and the negative signal trace, a second rejection trace;
• detecting, by the second rejection trace, a second common mode (CM) signal present on the differential signal traces, wherein the second CM signal is centered at a second frequency;
• reducing, by the second rejection trace, the second CM signal on the differential signal traces.

A data communication interface, comprising:

• a transmitter;
• a receiver;
• a pair of differential signal traces including a positive signal trace and a negative signal trace;
• a first rejection trace between the positive signal trace and the negative signal trace, the first rejection trace configured to detect a first common mode (CM) signal present on the differential signal traces and to reduce the first CM signal on the differential signal traces, wherein the first CM signal is centered at a first frequency;
• and
• a second rejection trace between the positive signal trace and the negative signal trace, the second rejection trace configured to detect a second common mode (CM) signal present on the differential signal traces and to reduce the second CM signal on the differential signal traces, wherein the second CM signal is centered at a second frequency.