| 摘要 |
The clock signal output of an oscillator is synchronized to the frequency of a data signal by detecting the phase difference between the two signals. The control signal signifying the difference is quantized into a number of standard units and a remainder. The remainder is accumulated and, when it is equal to a standard unit, added to the number signal signifying the number of standard units. The frequency of a fixed frequency oscillator is then adjusted in a direction tending to nullify the number signal.
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