Phase locked loop circuit and phase locked loop method
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United States of America Patent
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Feb 27, 2018
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N/A
app pub date -
Apr 8, 2016
filing date -
Apr 27, 2015
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Abstract
A phase locked loop circuit including: a loop filter having a high cutoff characteristic and a low cutoff characteristic that are switchable, and a switching circuit configured to: detect a timing when an irregular gap of no signal, included in a input signal, does not occur, and switch, in the detected timing, a cut off characteristic of the loop filter from the high cutoff characteristic during entrainment of phase locking of a output signal with the input signal to the low cut off characteristic after the phase locking.
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