| 摘要 |
PROBLEM TO BE SOLVED: To provide an oscillator which is capable of performing a high-speed frequency hopping, which stabling oscillation frequency. SOLUTION: Phase difference between output oscillation frequency of a VCO 1 whose control is based on a voltage responding to frequency data set by a frequency-setting means 2, and a reference frequency source 9 is calculated by a phase comparing means 8 and corrected by a PLL loop. Correcting operation is performed by correcting the voltage of a variable voltage amplitude means 6 or a voltage offset means 5 according to a comparison result of phase between the frequency data and a target frequency signal from the reference frequency source 9 corresponding to the frequency data, when the frequency data is set as a specified frequency. The oscillator operates to hold two set voltage as is in the frequency, except the specified frequency. |
