Patent ID: 8829957
Filing Date: 2014-09-09
Classification: G06F,H03L,H04J,H04L

Abstract:
1. A method of distributing a clock signal from a first electronic subsystem to a second electronic subsystem, said second electronic subsystem being remote from said first electronic subsystem and coupled to said first electronic subsystem by a bidirectional signal path, the method comprising a learning period prior to normal operation with the following steps: generating a first clock signal on said first electronic subsystem; generating a training signal on said first electronic subsystem clocked by said first clock signal; sending said training signal on said bidirectional signal path on a round trip to said second electronic subsystem and back to said first electronic subsystem: measuring a time said training signal needs for said round trip; and in response to the measured time, adjusting by a phase delay a phase of said training signal on the way to said second electronic subsystem in a first phase adjuster of the first electronic subsystem and adjusting by the same phase delay a phase of said training signal on the way back to said first electronic subsystem in a second phase adjuster of the second electronic subsystem so that said time needed for said round trip is equal to an even number of clock cycles of the first clock signal.