Timing signal generation device, electronic device, and moving object
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.
1. A timing signal generation device comprising:
a reference-timing signal output unit that outputs a reference timing signal;
an atomic oscillator that outputs a clock signal for synchronization with the reference timing signal;
a phase comparator that compares the reference timing signal and the clock signal in phase;
a frequency abnormality determination unit that determines whether or not a 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;
a sensor unit that detects environment information; and
a determination unit that determines a cause of the abnormality, by using the frequency abnormality information and the environment information.
2. The timing signal generation device according to claim 1 ,
wherein the atomic oscillator oscillates based on energy transition in a metal atom which has two ground levels different from each other,
the sensor unit includes a microwave receiver that enables detection of a microwave having a frequency which corresponds to an energy difference between the two ground levels, and
the environment information includes information regarding the microwave.
3. The timing signal generation device according to claim 1 ,
wherein the sensor unit includes a resonance sensor that enables detection of resonance received by the oscillator, and
the environment information includes information regarding the resonance.
4. The timing signal generation device according to claim 1 ,
wherein the sensor unit includes a power noise sensor that enables detection of a power noise, and
the environment information includes information regarding the power noise.
5. The timing signal generation device according to claim 1 ,
wherein the sensor unit includes a temperature sensor that enables detection of the temperature of the oscillator, and
the environment information includes information regarding the temperature.
6. The timing signal generation device according to claim 1 , further comprising:
an output unit that outputs a determination result of the determination unit.
7. The timing signal generation device according to claim 1 ,
wherein the reference-timing signal output unit is a GPS receiver.
8. An electronic device comprising:
the timing signal generation device according to claim 1 .
9. An electronic device comprising:
the timing signal generation device according to claim 2 .
10. An electronic device comprising:
the timing signal generation device according to claim 3 .
11. An electronic device comprising:
the timing signal generation device according to claim 4 .
12. An electronic device comprising:
the timing signal generation device according to claim 5 .
13. A moving object comprising:
the timing signal generation device according to claim 1 .
14. A moving object comprising:
the timing signal generation device according to claim 2 .
15. A moving object comprising:
the timing signal generation device according to claim 3 .
16. A moving object comprising:
the timing signal generation device according to claim 4 .
17. A moving object comprising:
the timing signal generation device according to claim 5 .