METHOD FOR DETERMINING PHASE DIFFERENCE OF TRACKING ERROR SIGNAL
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United States of America Patent
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Issued Date -
Feb 11, 2016
app pub date -
Mar 31, 2015
filing date -
Aug 11, 2014
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Abandoned
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Abstract
A method for determining phase difference of tracking error (TE) signal is disclosed. The method includes following steps. An optical disc drive is activated to generate a TE signal. Amplitudes of the master push pull (MPP) signal, the secondary push pull (SPP) signal and the TE signal are measured. The phase difference between the MPP signal and the SPP signal of the TE signal is quickly calculated according to the law of cosine.
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