| 摘要 |
PURPOSE:To ensure an easy and sure back-up for a data transfer device with time points by using a large capacity capacitor to back up a memory device and a timepiece device. CONSTITUTION:Each of the memory devices 1 and timepiece devices of a device which transmits data with time points is backed up in a service interruption mode, etc. by a back-up power supply 41 a large capacity capacitor of a farad unit which is charged by a DC power supply 5 which rectifies a commercial power supply, etc., and another back-up power supply 42 with which a back-up current is prevented from conducting to the device 1 via a diode 9. Thus it is possible to avoid such a case where the satisfactory recharging is impossible in the application mode of a long time like a case a rechargeable battery is used as a back-up power supply. Then the simple, stable and sure back-up is secured with a data transfer device. |
