| 摘要 |
<p>PURPOSE:To automatically rectify an error time of a clock attached to an electronic device. CONSTITUTION:NCU 3 is connected to a line 7, for obtaining a standard time by the time signal of a public telephone line. Control is performed by means of a main control part 1, and a beginning condition is decided by means of a timer 2. After connecting to the line, call of dial pulse is performed for the time signal of No. 117, and voice data of a standard time is input to a voice data processing part 4 with NCU 3 so as to recognize the time. The recognized time data is memorized in a memory part 5. For improving correctness of the time, the time is recognized again, compared with the preceedingly memorized hour and minute of the time, and the process is repeated up to coincidence. In the case of same time, the time of a clock control part 6 is set as a standard time. At completion of setting the clock control part 6, connection of NCU to the line is cut off. By setting the timer 2 so as to rectify a time at a certain interval, for example once per a half month, correct time can be always maintained.</p> |
