Electronic devices having automatic frequency control systems and methods and computer program products for operating the same
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United States of America Patent
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Feb 13, 2007
Grant Date -
Mar 25, 2004
app pub date -
Jun 10, 2003
filing date -
Sep 23, 2002
priority date (Note) -
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Abstract
An automatic frequency control (AFC) system in an electronic device is operated by using an AFC-algorithm component to determine a frequency error corresponding to a difference between a frequency of a signal output from a signal generator and a received signal frequency. The frequency error determined by the AFC-algorithm component is multiplied by a scaling factor, which is set to zero after an adjustment has been made to change a frequency of the signal output from the signal generator. The scaling factor is increased from zero to one over time. The scaled frequency error is used to determine whether to adjust the frequency of the signal output from the signal generator.
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