CLOCK DISTRIBUTION AND ALIGNMENT USING A COMMON TRACE

摘要

Methods and system for clock alignment are described. In an example, a timing device can distribute a clock signal to a line card via a trace of a backplane. The timing device can further send a pulse to the line card at a first time via the trace. The timing device can further receive a return pulse from the line card at a second time via the trace. The timing device can determine a time difference between the first time and the second time. The time difference can indicate a propagation delay associated with the line card and the trace. The timing device can send the time difference to the line card. The line card can adjust a phase delay offset of the line card using the time difference.