| 摘要 |
A digital control oscillator includes a reference signal generation circuit for generating a first reference signal of a first signal level, and a second reference signal of a second signal level, a conversion circuit for referring to the first and the second reference signals, and converting a digital signal being inputted into an analog output control signal in a range from the first signal level to the second signal level, and an output oscillator for outputting clocks having a frequency corresponding to the output control signal.
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