| 摘要 |
PURPOSE:To obtain a correct time by a method wherein an error proper to a clock is detected from the difference between a standard time signal and an inner time of the clock and the correction of time is performed based on the error. CONSTITUTION:When a standard time signal 8 is received, the difference between a value of a time counter 7 and a value of a standard time setting unit 6 is determined by an operation element 5. Next, the present corrected value is determined from the last corrected value stored in a memory 4, an error determined at the last time, and an error found at present. Then, an output of an oscillation element 1 is corrected in a correction circuit 2 based upon the corrected value thus obtained. |
