FREQUENCY CALIBRATION METHOD FOR DIGITALLY CONTROLLED OSCILLATOR AND APPARATUS USING THE SAME
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United States of America Patent
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Dec 19, 2016
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Sep 21, 2016
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The present disclosure illustrates a frequency calibration method adapted to the digitally controlled oscillator (DCO) and apparatus using the same. The frequency calibration method can detect a degree of frequency offset between an actual frequency of a clock signal outputted by the digitally controlled oscillator and a desired frequency, and then performs the correlation calibration process accordingly to make sure that the frequency of the clock signal can approach to the desired frequency.
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