公开(公告)号：US11561572B2

公开(公告)日：2023-01-24

申请号：US17136579

申请日：2020-12-29

申请人： Renesas Electronics America Inc.

发明人： Leon Goldin ,  Greg Armstrong

IPC分类号： G06F1/04 ,  G06F1/14 ,  G06F1/10

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.