Reflection-canceling package trace design

An electronic assembly that comprises:

• a first die having a transmitter circuit;
• a second die having a receiver circuit;
• a first substrate trace electrically connected to the transmitter circuit;
• a second substrate trace electrically connected to the receiver circuit;
• and
• one or more intermediate traces electrically connected in series with the first and second substrate traces to convey a digital signal having a predetermined symbol interval,
• the first substrate trace and the second substrate trace respectively providing first and second propagation delays to the digital signal, the first and second propagation delays having a difference with a magnitude equal to one half of the predetermined symbol interval.

A non-transitory information storage medium having software that causes a computer to implement a method comprising:

• determining a first propagation delay for an electrical signal to traverse the first substrate trace, the electrical signal having a predetermined symbol interval;
• determining a second propagation delay for the electrical signal to traverse the second substrate trace;
• and
• setting a length for at least one of the first and second substrate traces, the length yielding a difference between the first and second propagation delays, the difference having a magnitude equal to half the predetermined symbol interval.