| 摘要 |
<p>A radio-controlled timepiece (1) includes an oscillator circuit (22) of which an oscillation condition can be varied by an oscillation condition adjustment circuit (23) that adjusts an oscillation frequency fref, a frequency divider circuit (24) that divides the oscillation frequency fref and generates a time measurement reference timing signal F1, a frequency adjustment circuit (25) that adjusts the period of time measurement reference timing signal F1, a local oscillator circuit (33) that uses the oscillation frequency fref as a reference frequency and outputs a local oscillation frequency fLO, and a control circuit (26). The control circuit (26), when the radio-controlled timepiece (1) is performing reception operations, causes the oscillation condition adjustment circuit (23) to operate whereby the oscillation frequency fref is adjust to an optimal frequency for the local oscillator circuit (33) and the variation setting value of the frequency adjustment circuit (25) is set such that time measurement reference timing signal F1 has a fixed period for normal operations and for reception operations.</p> |
