| 摘要 |
PURPOSE:To always set the timepiece of machinery to an accurate state by automatically and accurately setting time. CONSTITUTION:The time casting signal due to broadcasting is received and demodulated by a time detection circuit 1 and subsequently digitalized to obtain a sound signal which is, in turn, shifted. The data obtained by this shift operation is compared with a fixed pattern and the reference signal of time is formed on the basis of this comparing operation and a clocking circuit 2 is corrected on the basis of the reference signal of time by a microprocessor 21 to form accurate time data. |
