| 摘要 |
PURPOSE: A frequency control method is provided, which is capable of reducing a clock difference by acquiring data for frequency control using a time division method and estimating a different value of frequency clocks using the minimum power method. CONSTITUTION: A timer is set to acquire a difference between frequency clocks generated from a duplex time/frequency generating device, and detecting whether an interrupt of the timer is generated. A difference of the clocks is acquired whenever the interrupt of the timer is generated, and a difference is estimated. Whether a difference value of the clocks is within a control range is confirmed. A variable delay device is controlled to synchronize the clocks only when a difference value of the clocks is over a control range.
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