Method and apparatus for synchronizing slave network node to master network node

摘要

The present invention relates to a system for synchronising slave and master timing, comprising a phase adjust circuit for receiving and delaying an arbitrary clock signal by an adjustable amount and outputting a delayed clock signal related to the slave timing, and a master phase detector and lock circuit for comparing relative phases of the master and slave timing and in response generating and applying delay adjust signals to the phase adjust circuit at a dynamically adjusted rate which is related to the relative phase in order to synchronise the slave and master timing and is thereafter reduced to a minimum rate required to maintain synchronisation of the slave and master timing.