| 摘要 |
<p>PROBLEM TO BE SOLVED: To correct the time of a timer device using time signals in such a way as to reduce errors in the detection of time signals, while providing a wide range of correction through a simple procedure. SOLUTION: A voice signal of a predetermined frequency, including a broadcast time signal, is digitized by an A/D converter 23 and inputted to the processing circuit 11 of the timer device and time signals are detected by a control part 24 during a predetermined period of detection of the time signals. When the time signal is detected, the time of a correcting timer (second timer) 22 is set to match the detected time signal while an internal clock (first timer) 21 is left intact. After the predetermined period of detection of the time signals has elapsed, the time signals detected during that period are identified, and if a plurality of time signals are detected, the time is corrected so that the time of the internal clock 21 coincides with the time of the correcting timer 22 set to match the time signal which has a minimal difference from the time of the internal clock 21 before correction.</p> |
