Integrated circuit with on-chip clock frequency matching to upstream head end equipment

摘要

One aspect of the present invention concerns a method for controlling the frequency of oscillation of a local clock signal comprising the steps of (A) generating the clock signal in response to a first control signal, (B) generating the first control signal in response to one of a plurality of adjustment signals selected in response to a second control signal and (C) generating the second control signal in response to a comparison between a local timestamp and an external timestamp.