| 摘要 |
<p>PURPOSE:To stably output correct time information without being effected by the state of a radio wave. CONSTITUTION:A clock part/control part 2-1 controls a modulator 2-4 via a communication control part 2-3 to dial '1', '1' and '7' on a telephone line 3, the telephone line 3 is connected to the time signal of telephone service and sound notifying time and time signal sound are inputted to the modulator 2-4. The modulator 2-4 modulates the time signal sound and outputs a modulated sound signal 102 to a pulse regeneration part 2-2. The pulse regeneration part 2-2 outputs a pulse signal 103 synchronized with the input timing at the time signal sound in the clock part/control part 2-1. As a result, the clock part/ control part 2-l advances the time information with the pulse signal used as a reference clock and outputs the time information to a central processing unit 1 as a synchronization signal 101.</p> |
