Method and apparatus for adapting a receiver frequency plan according to location
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United States of America Patent
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Mar 23, 2010
Grant Date -
Oct 25, 2007
app pub date -
Apr 24, 2006
filing date -
Apr 24, 2006
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Abstract
A selectable frequency source for use in GPS receivers. A device in accordance with the present invention comprises a reference frequency source, a first divider, coupled to the reference frequency source, the first divider having a first dividing factor, a first mixer, coupled to the first divider, a filter, coupled to the first mixer, a voltage controlled oscillator, coupled to the filter, a second divider, coupled between the voltage controlled oscillator and the first mixer, the second divider having a second dividing factor, and a second mixer, coupled to an output of the voltage controlled oscillator, for mixing a GPS signal with the output of the voltage controlled oscillator, wherein at least one of the first dividing factor and the second dividing factor is changed to change a frequency output of the voltage controlled oscillator.
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