Patent ID: 7016449
Filing Date: 2006-03-21
Classification: H03L,H04L

Abstract:
1. A system for recovering timing information from a serial data signal, comprising: a phase interpolator adapted to derive a data sampling signal and a phase sampling signal each having an interpolated phase responsive to a plurality of phase control signals, wherein the phase sampling signal is offset in phase relative to the data sampling signal by a predetermined amount; a data path adapted to sample the serial data signal according to the data sampling signal to produce a data signal; a phase path adapted to sample the serial data signal according to the phase sampling signal to produce a phase signal; a phase detector adapted to produce a phase error signal based on the data signal and the phase signal, wherein the phase error signal is indicative of a phase offset between the data sampling signal and the serial data signal; a phase error processor coupled to the phase detector and adapted to produce a frequency offset estimate signal based on long-term error processing of the phase error signal, wherein the frequency offset estimate signal is indicative of a frequency offset between the data sampling signal and the serial data signal; a command generator coupled to the phase error processor and adapted to generate a rotator control signal in response to the frequency offset estimate signal; and