Patent ID: 6400683
Filing Date: 2002-06-04
Classification: H04J,H04L

Abstract:
A method for adapting an output clock frequency of a buffer to an input clock frequency to the buffer, said method comprising the steps of:measuring a fill level of the buffer at the end of each of successive observation periods; where the measured fill level exceeds a predetermined upper threshold level, adjusting the output clock frequency upwardly by a predetermined amount, and maintaining a count of the number of successive adjustment operations performed; where the measured fill level is less than a predetermined lower threshold, adjusting the output clock frequency downwardly by a predetermined amount, and maintaining a count of the number of successive adjustment operations that are performed; where the measured fill level had been outside a range of levels bounded by the upper threshold level and the lower threshold level but has returned to a level within said range, performing a number of reverse adjustments of the output clock frequency, the number of reverse adjustments being less than the number of successive adjustment operations previously performed.