METHOD AND APPARATUS FOR EXTENDING THE RANGE FOR TRACKING ERRORS IN PHASE LOCK LOOPS

摘要

A method for extending the range for tracking phase errors in a phase lock loop, the method including the steps of: measuring a raw phase error; comparing said raw phase error with a previous phase error to compute a phase difference; calculating an extended phase error based on said phase difference; comparing the calculated extended phase error with said previous phase error to compute an extended phase difference; comparing said phase difference with said extended phase difference to calculate a new phase error, wherein said new phase error is used as an input to said phase lock loop; and apparatus therefor.