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    • 1. 发明授权
    • Master clock with electronic memory
    • 主时钟带电子记忆体
    • US3889461A
    • 1975-06-17
    • US40796373
    • 1973-10-19
    • PATEK PHILIPPE SA
    • MARTI RAYMONDCHANSON OLIVIER
    • G04C13/02G04G9/00G04G19/10G04B1/00
    • G04G9/0005G04C13/02G04G19/10
    • A master clock having an oscillator, a divider, a signal shaper, an output amplifier, and power feed either by means of an electric circuit or by means of a battery at the time of power failure in the circuit. A detector for circuit voltage is provided which upon a fall in circuit voltage switches signals from the output of the divider to an electronic memory. Upon reestablishment of power in the circuit, the time signals are fed out of the memory at an accelerated rate to cause the secondary clocks controlled by the master clock to catch up. It is thus possible to use only a small and inexpensive standby battery for use during power failure.
    • 具有振荡器,分频器,信号整形器,输出放大器的主时钟,以及电路中的电源故障时通过电路或借助于电池供电的主时钟。 提供用于电路电压的检测器,其在电路电压下降时将信号从分频器的输出切换到电子存储器。 在重新建立电路中的电源时,时间信号以加速的速率从存储器输出,以使由主时钟控制的辅助时钟赶上。 因此,在停电时可以仅使用小型廉价的备用电池。