| 摘要 |
<p>PROBLEM TO BE SOLVED: To allow time read-in via the analysis of a time code even with the weak radio wave and to reduce the limitation on the installation position of a timepiece body. SOLUTION: When time data are read in by the analytical process of the standard radio wave, a time code is read after 1-sec synchronization and 0-sec position detection, and level detection is made by sampling pulses. The level detection of the time data signal is made for the time of a long pulse width from the output start point of each code expressing each bit data by the length of the pulse width. When an active level is detected only during the time of a short pulse width, '1' is set. When the active level is detected after the time of the short pulse width elapses, '0' is set. If the time data are not within the range of the value normally used for time display, the analytical process of the standard ratio wave is again started from the 1-sec synchronization and 0-sec position detection.</p> |
