Method and circuit arrangement for synchronizing a function unit with a predetermined clock frequency
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United States of America Patent
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Jun 23, 2009
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N/A
app pub date -
Feb 10, 2005
filing date -
Feb 10, 2004
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Abstract
A receiver is synchronized with a first clock frequency or signal of a transmitter for the proper reception of transmitted and received signals, such as data carrying signals (DS). The first clock frequency is for example a carrier frequency. A local oscillator generates a second clock frequency or signal in the receiver. Cycles or impulses of the second clock signal are counted between predetermined flanks of the received signal (DS) to provide a count (N). Based on the second clock signal and the count (N) a first ratio (TV) is provided that represents a first ratio between the first clock frequency or signal and the second clock frequency or signal. The first ratio is compared with a predetermined or given second ratio (TV) to provide a comparing result. The predetermined second ratio is then updated in response to the comparing result to provide an updated ratio (TV′). The present circuit is constructed to perform these steps.
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