| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a reference signal generation device that suppresses an error in a reference signal even if there is only an irregular discontinuous reference signal available.SOLUTION: While continuously acquiring an appropriate reference signal, a reference signal generation device controls a voltage-controlled oscillator on the basis of the reference signal. If failing to continuously acquire an appropriate reference signal, the reference signal generation device determines a phase difference (difference) between an output signal and a reference signal, and if the phase difference does not exceed a threshold, estimates a control value (control voltage) of the voltage-controlled oscillator to control the voltage-controlled oscillator. In the case of failing to continuously acquire an appropriate reference signal, if the difference exceeds the threshold, and a reference signal is acquired discontinuously, the reference signal generation device performs difference reduction control which controls the difference toward zero in a predetermined time.</p> |
