Frequency divider, frequency synthesizer and application circuit
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United States of America Patent
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May 21, 2013
Grant Date -
Sep 9, 2010
app pub date -
Jul 9, 2009
filing date -
Mar 4, 2009
priority date (Note) -
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Abstract
A frequency divider includes a prescaler and multiple modulus dividers commonly coupled to the prescaler. The prescaler generates intermediate frequency signals having a same phase difference with respect to one another in response to an oscillation frequency signal. The prescaler operates at a first frequency. The modulus dividers respectively divide the intermediate frequency signals with respective ratio to provide a plurality of division frequency signals in response to a control signal. The modulus dividers operate at a second frequency less than the first frequency.
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