| 摘要 |
PROBLEM TO BE SOLVED: To quickly output the frequency division signal of a desired frequency by selecting and outputting either a frequency division signal or an original oscillation signal with data outputted from a data control circuit to a frequency division selection circuit. SOLUTION: This oscillation circuit is provided with a frequency division selection circuit 10 which inputs an original oscillation signal outputted from an oscillator 2 and a frequency division signal outputted from a frequency dividing circuit 9 and selects and outputs either the frequency division signal or the original oscillation signal, and a data control circuit 8 which outputs data controlling the circuit 10 to the circuit 10. Then, either the frequency division signal or the original oscillation signal is selected and outputted according to the data outputted from the circuit 8 to the circuit 10. Then, it is possible to quickly output the frequency division signal of a desired frequency because the original oscillation signal is outputted to the outside of the oscillation circuit, a frequency adjusting means adjusts the frequency of the original oscillation signal, and subsequently, the data is outputted from the circuit 8 to the circuit 10 so that a desired frequency division signal can be outputted. |
