Patent ID: 6304582
Filing Date: 2001-10-16
Classification: H03L,H04J,H04L

Abstract:
A synchronization system comprising:a reference signal recovery unit for recovering a reference signal, said reference signal having phase and frequency signal characteristics;a controllable signal source for producing an output signal having phase and frequency signal characteristics;a signal detector connected to an output of said recovery unit and an output of said controllable signal source, said signal detector detects signal differences in each of said signal characteristics between said output signals, and produces a difference signal indicative of said differences; anda controller, said signal detector, controller, and controllable signal source connected to form a single feedback loop, wherein said controller is connected to receive said difference signal as an input and for producing a control signal for controlling said controllable signal source such that signal differences in both of said characteristics are controlled, wherein said controller includes boundary conditions for controlling said system and wherein the boundary conditions include stepped thresholds which define multiple modes of operation.