Dividing a frequency by 1.5 to produce a quadrature signal
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United States of America Patent
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Aug 12, 2014
Grant Date -
May 30, 2013
app pub date -
Oct 16, 2012
filing date -
Nov 28, 2011
priority date (Note) -
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Abstract
An apparatus for dividing a frequency by 1.5 to produce a quadrature signal is disclosed. The apparatus includes a divider that receives a differential input signal with a first frequency and two phases and creates a six-phase signal at a second frequency. The second frequency is the first frequency divided by 3. The apparatus also includes precision phase rotation circuitry that receives the six-phase signal and produces an eight-phase signal. The apparatus also includes a doubler that receives the eight-phase signal and produces a quadrature signal. The quadrature signal has a third frequency that is the first frequency divided by 1.5.
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