| 摘要 |
<p>PURPOSE:To improve the accuracy of a time supervision by sending a time requesting completing signal from a third counting means when a second timing signal is inputted. CONSTITUTION:A first timing signal of a counted value T second is repeatedly added from a first counting means 3 to a third counting means 2. When the time request of nT seconds is inputted to a third counting means 2, counted value T1 seconds are accumulated, the counted value of the first timing signal is set to '0' of an initial value, each time the first timing signal is inputted, the counted value is increased one by one and when counting is executed (n) times, the counted value T1 accumulated at a second counting means 4 is sent. The second counting means 4 is activated, an input clock is counted, the counted value is coincident with T1 seconds, and then, the second timing signal is sent, and the time point to input the second timing signal to the third counting means 2 is the time point when the time nT seconds pass through correctly from the time requesting time point. Thus, the accuracy of the time supervision is improved.</p> |
