Patent ID: 6754296
Filing Date: 2004-06-22
Classification: H04B

Abstract:
Apparatus for generating a reference frequency depending on a timing information extracted from a data stream, comprising:at least one free-running oscillation means, wherein at least two oscillation signals are derived from the at least one oscillation means, estimation means for estimating for each of the at least one free-running oscillation means the frequency deviation on the basis of the timing information, frequency modifying means for modifying the frequency of at least one of the at least two oscillation signals by a frequency correction value, linking means for linking the at least two oscillation signals to a signal yielding said reference frequency wherein the reference frequency is connected with the frequencies of the at least two oscillation signals by an unambiguous functional relation, controlling means for determining the respective frequency correction value on the basis of the at least one estimated frequency deviation such that the timing information given by the reference frequency corresponds to the timing information extracted from said data stream.