Timing signal generation device, electronic device, and moving object
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United States of America Patent
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May 22, 2018
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app pub date -
May 20, 2016
filing date -
May 27, 2015
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Abstract
A timing signal generation device includes a GPS receiver, an atomic oscillator, a phase comparator, a frequency abnormality determination unit, a sensor unit, and a determination unit. The GPS receiver outputs 1 PPS. The atomic oscillator 30 outputs a clock signal for synchronization with 1 PPS. The phase comparator compares 1 PPS and the clock signal in phase. The frequency abnormality determination unit determines whether or not the frequency of the clock signal is abnormal, by using a comparison result of the phase comparator, and outputs frequency abnormality information including a determination result. The sensor unit detects environment information which has an influence on the comparison result. The determination unit determines a cause of the abnormality by using the frequency abnormality information and the environment information.
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