JP2002152036A - Reference signal generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reference signal generator that is in operation at low power consumption and outputs a signal synchronously with an external signal without the use of a thermostatic oven and a voltage controlled type crystal oscillator. SOLUTION: The reference signal generator receives a synchronizing signal 1 synchronously with an external signal from an external device, generates a gate time from the synchronizing signal and counts an output frequency of a reference clock 5 within its gate time. The value of obtained counts corresponds to a frequency change of the reference clock 5, an arithmetic means 13 decides a frequency division ratio used to frequency-divide the reference clock 5 corresponding to the counts, a frequency division ratio change means 10 decreases/increases a time interval when a frequency division signal 9 is outputted so as to synchronize the output time of the frequency division signal 9 with the external signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reference signal generating device for periodically outputting a reference signal used in a control device or a measuring device at regular intervals in synchronization with an external signal.

[0002]

2. Description of the Related Art Conventionally, in control devices and measurement devices, control and measurement have been performed using a reference clock or a frequency-divided signal in the device as a reference signal.

When control or measurement is performed using a reference clock or a frequency-divided signal in a control device or a measurement device as a reference signal,
If the oscillation frequency of the reference clock is disturbed by the effect of temperature change and the interval of the signal used as the reference fluctuates, the control time and the sampling time of the measured value become unclear, and the control and measurement performed by other devices become unclear. It was inconvenient because it could not be compared with the result of.

[0004] Therefore, the reference clock oscillating means is placed in a thermostat to stabilize the output frequency of the reference clock oscillating means, or a voltage-controlled crystal oscillator is used as the reference clock oscillating means. The oscillation frequency was stabilized by changing the voltage applied to.

[0005] In these methods, the constant temperature tank and the voltage control circuit must be operated continuously, which has the disadvantage of increasing power consumption and the disadvantage of increasing the size of the apparatus. Even with these methods, aging due to the deterioration of the electronic components that make up the reference clock oscillation means is inevitable, and it is necessary to periodically calibrate the output frequency of the reference clock.

Recently, a GPS which receives a standard time transmitted as a radio wave from a communication satellite or a terrestrial transmitting station is used.
Clocks and radio clocks were developed. As a result, signals synchronized with the standard time are easily obtained, and based on these signals,
Control and measurement have been performed.

When control or measurement is performed based on the output signals of a GPS clock or a radio clock, these clocks need to be operated continuously, which has a drawback of increasing power consumption and is transmitted. When the reception condition of the radio wave deteriorated, there was a disadvantage that the signal synchronized with the standard time could not be obtained.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the following.
Even if a high-precision synchronization signal from a GPS clock or a radio clock is not continuously input, it is hardly affected by a change in temperature or power supply voltage, and can output a reference signal having a constant interval. It is to provide a small-sized reference signal generator that is stable for a long time and has little noise.

[0009]

According to a first aspect of the present invention, there is provided a signal receiving means for receiving a synchronization signal synchronized with an external signal, and a gate for generating a gate time from the synchronization signal. Time generating means, reference clock oscillating means for oscillating a reference clock, counting means for counting the reference clock within the gate time, latch means for latching the count value of the counting means, and frequency division of the reference clock Frequency dividing means for outputting a frequency-divided signal, a frequency dividing ratio changing means for changing the frequency dividing ratio of the frequency dividing means for dividing the reference clock, and a temperature measurement for measuring a temperature around the reference clock oscillating means. Means, storage means for storing a relationship between the temperature measured by the temperature measurement means and the count value latched within the gate time, and a storage means for storing the relationship based on the storage data. A reference signal generating device and an arithmetic means for obtaining a frequency division ratio Te, by these means,
Signals for control and measurement are synchronized with external signals and output periodically at regular intervals.

According to a second aspect of the present invention, there is provided the reference signal generator according to the first aspect, wherein a crystal temperature sensor is used for the temperature measuring means.
Using the relationship between the measured temperature change and the reference clock frequency change, signals for control and measurement are synchronized with external signals and output periodically at regular intervals.

According to a third aspect of the present invention, there is provided an apparatus according to the first or second aspect, further comprising voltage measuring means for measuring a power supply voltage applied to the reference clock oscillating means. 2. The reference signal generator according to item 2,
Using the relationship between the measured change in the power supply voltage and the change in the frequency of the reference clock, the control and measurement signals are synchronized with an external signal and output periodically at regular intervals.

The apparatus according to the present invention includes a synchronizing signal generating means for generating a synchronizing signal synchronized with a standard time transmitted as a radio wave from a communication satellite or a terrestrial transmitting station. 4. The reference signal generator according to claim 1, wherein the frequency division ratio for dividing a reference clock is determined by using a signal synchronized with a standard time. While changing, the signals for control and measurement are synchronized with the standard time and output periodically at regular intervals.

According to a fifth aspect of the present invention, there is provided a signal receiving means for receiving a synchronization signal according to the first aspect, and a gate time for generating a gate time according to the first aspect. A means for generating, a temperature measuring means for measuring a temperature around the reference clock oscillating means, a voltage measuring means for measuring a power supply voltage applied to the reference clock oscillating means according to claim 3, and a synchronization with a standard time according to claim 4. A synchronizing signal generating means for generating a synchronizing signal,
This power supply is characterized in that it can be turned on intermittently. Then, while intermittently turning on the power to these means, the signals for control and measurement are synchronized with the standard time and output periodically at regular intervals.

According to a sixth aspect of the present invention, there is provided a reference signal generator having a scheduler for scheduling power on / off control according to the fifth aspect, wherein the reference signal generator is based on a preset schedule. While turning on the power to the various means described in claim 5 intermittently, the control and measurement signals are synchronized with the standard time and periodically output at regular intervals.

According to a seventh aspect of the present invention, there is provided an apparatus according to the seventh aspect of the present invention, wherein a microprocessor is integrally incorporated, and a control signal of the microprocessor is used to control the means according to the first, second, or third aspect. At least one is a controlled reference signal generator that synchronizes signals for control and measurement with an external signal and periodically outputs them at regular intervals.

In the apparatus according to the present invention, as described in claim 7, a microprocessor is integrally incorporated, and a control signal of the microprocessor is used to control the means according to claim 4, claim 5, or claim 6. At least one is a controlled reference signal generator that synchronizes signals for control and measurement with a standard time and periodically outputs them at regular intervals.

[0017]

According to the first aspect of the present invention, there is provided a reference signal generator according to the present invention, comprising: signal receiving means for receiving a synchronization signal synchronized with an external signal; and gate time creation means for creating a gate time from the synchronization signal. A reference clock oscillating means for oscillating a reference clock, a counting means for counting the reference clock within the gate time, a latch means for latching a count value of the counting means, a frequency dividing and dividing the reference clock Frequency dividing means for outputting a signal; frequency dividing ratio changing means for changing a frequency dividing ratio of the frequency dividing means for dividing the reference clock; temperature measuring means for measuring a temperature around the reference clock oscillating means; Storage means for storing the relationship between the temperature measured by the temperature measurement means and the count value obtained by counting within the gate time, based on the storage data It is constituted by an arithmetic means for obtaining a frequency division ratio.

The signal receiving means of the reference signal generator configured as described above receives a synchronization signal synchronized with an external signal, creates a gate time, counts a reference clock within the gate time, and stores the value. Latch. If the oscillation frequency of the output reference clock does not fluctuate, the gate time is constant, so it is counted within the gate time and the latched count value is a predictable constant value. If the latched count value matches the predicted value, the output of the frequency-divided signal is synchronized with the external signal, and there is no need to change the frequency of the reference clock. However, if the frequency of the output reference clock is high, the latched count value becomes larger than a predetermined value, and if the frequency is low, the latched count value becomes smaller than the predetermined value. In such a case, in order to synchronize the output of the divided signal with the external signal, it is necessary to change the dividing ratio and adjust the time required for dividing.

If the latched count value is larger than the predicted value, the frequency division ratio for dividing the reference clock is increased, and the number of reference clocks for frequency division is increased by an amount corresponding to the rate of frequency increase. Delay the signal output time and synchronize the timing of the output frequency-divided signal with the external signal. Conversely, if the latched count value is smaller than the predicted value, the frequency division ratio for dividing the reference clock is reduced, and the reference clock for frequency division is reduced by an amount corresponding to the rate at which the frequency decreases. The time for outputting the divided signal is shortened, and the timing of the outputted divided signal is synchronized with the external signal. As described above, while creating the gate time by the synchronization signal synchronized with the external signal input from the external device, changing the division ratio of the reference clock divided within the gate time, the timing of outputting the divided signal, In other words,
The output time of the divided signal is made faster or slower to synchronize with the external signal.

An example of a method of changing the frequency division ratio to match the timing of outputting a frequency-divided signal with the timing synchronized with a predetermined external signal will be described with reference to FIG. In FIG. 4, the time chart indicated by A at the top shows a synchronization signal synchronized with an external signal. The second time chart B shown from the top shows a frequency-divided signal obtained by dividing the output of N reference clocks. As described above, if there is no change in the output frequency of the reference clock, the frequency-divided signal of the frequency division ratio N indicated by B has a predetermined timing and changes at the same time as the synchronization signal indicated by A. If the ratio of the output frequency of the reference clock changes from N to N + M, N
The frequency-divided signals obtained by dividing the outputs of the reference clocks and shown in the third time chart C from the top are equivalent to the ratio of M in which the output frequency of the reference clock is increased by A.
It will be faster than the synchronization signal in the time chart shown in. In order to make the frequency division signal shown in the time chart C coincide with the synchronization signal shown in the time chart A, the frequency division ratio of N is divided by N + M as shown in the fourth time chart of D from the top. It is sufficient to divide the output of the reference clock by changing the ratio, and output the divided signal while delaying the time required for the division.

The above description is for the case where the output frequency of the reference clock oscillating means increases, and the ratio changes from N to N + M. Conversely, when the output frequency of the reference clock decreases and the ratio changes from N to NL,
The frequency-divided signal shown in the fifth time chart E from the top, obtained by dividing the output of the N reference clocks, corresponds to the ratio of L at which the output frequency of the reference clock has decreased.
It is slower than the synchronization signal of time chart A. In such a case, in order to make the frequency-divided signal coincide with the synchronization signal, as shown in the time chart F at the bottom, the frequency dividing ratio of N is changed to the frequency dividing ratio of N-L to change the reference value. It is only necessary to divide the clock output and output a divided signal while shortening the time required for the division.

The synchronizing signal synchronized with the external signal and the output signal of the reference clock are digital signals, and the synchronizing signal synchronized with the external signal shown in the time chart A coincides with the timing at which the output frequency of the reference clock changes. May not. In such a case, the frequency-divided signal and the synchronization signal are shifted by a time corresponding to the length of one reference clock, and a digital error occurs. However, rather than determining the frequency division ratio from two consecutive synchronization signals, if a plurality of synchronization signals are used and the reference clock is counted over a longer period of time, such a digital error can be relatively reduced. Can be reduced. Also, by taking into account the fluctuation of the reference clock due to the passage of time, if the frequency division ratio for dividing the output of the reference clock is changed by calculation, the output timing of the frequency-divided signal and the synchronization signal shown in the time chart of FIG. The relative error with can be reduced.

Although the output frequency of the reference clock is affected by the temperature change around the reference clock oscillating means, by the above-described method, the frequency of the reference clock is divided while the synchronization signal synchronized with the external signal is input. The output of the frequency-divided signal of the reference clock is synchronized with the external signal by changing the ratio, and the relationship between the frequency division ratio and the measured temperature change around the reference clock oscillator is calculated.

When using a control device or a measuring device incorporating the reference signal generating device according to the present invention, the frequency of the reference clock is divided while the output of the frequency-divided signal is synchronized with the synchronization signal synchronized with the external signal. The relationship between the ratio and the measured temperature change is determined and stored in the memory, which is the storage means. After a certain period of time, the frequency division signal and the external signal can be set by setting the frequency division ratio to the temperature change around the reference clock oscillating means according to the surrounding conditions where the control device and measurement device are installed. The operation determines whether can be synchronized. After the relationship between the temperature change and the frequency division ratio is obtained in this manner, the temperature change around the reference clock oscillator is calculated based on the relationship stored in the memory. By changing the division ratio to the optimal value, it is possible to output a reference signal synchronized with the external signal.

With the reference signal generator according to the present invention,
The relationship between the dividing ratio and the ambient temperature must be finely determined in accordance with the environment in which the control and measurement devices are installed. Even if the environment around the device changes while the device is operating,
If necessary, if the ratio of the frequency division ratio is changed again by calculation, it is possible to synchronize the output of the frequency-divided signal with an external signal in response to changes in the environment.

If a crystal temperature sensor is used as the temperature measuring means as described in claim 2, the temperature change around the reference clock oscillating means can be measured with high accuracy without consuming much power, and information based on the measured value can be obtained. By using, the division ratio of the reference clock oscillator can be changed and the reference signal synchronized with the external signal can be output, and a small and low power consumption reference signal generator can be manufactured.

According to a third aspect of the present invention, if the frequency division ratio is changed while measuring the power supply voltage applied to the reference clock oscillating means, the fluctuation of the power supply voltage and the change in the power supply voltage can be obtained in the same manner as the temperature change. The relationship with the change of the frequency ratio is obtained, and from the information of the measurement result of the power supply voltage, the frequency division ratio for dividing the frequency of the reference clock oscillator is changed, and a reference signal synchronized with the external signal is output.
A small reference signal generator can be manufactured.

In the case of a reference signal generator in which the relationship between the change in temperature and the dividing ratio or the relationship between the change in power supply voltage and the dividing ratio is obtained, the external device is intermittently turned on as necessary. In each case, it is possible to produce a small and low power consumption reference signal generator that outputs a reference signal synchronized with the external signal while correcting the division ratio of the reference clock to the optimum value by the external signal.

According to a fourth aspect of the present invention, if a synchronizing signal generating means for generating a synchronizing signal synchronized with the standard time, which is transmitted as a radio wave from a communication satellite or a terrestrial transmitting station, is integrated, the standard time can be obtained. It can output a reference signal synchronized with, and can reduce the weight of the reference signal generator and make it easier to handle.

According to a fifth aspect of the present invention, the reference signal generator according to the present invention comprises: 1) a signal receiving means for a synchronous signal synchronized with a standard time; 2) a gate time creating means for creating a gate time from the synchronous signal. , 3) temperature measuring means for measuring the temperature around the reference clock oscillating means, 4) voltage measuring means for measuring the power supply voltage applied to the reference clock oscillating means, 5)
If a power supply for intermittently driving the synchronization signal generation means for generating a synchronization signal synchronized with the standard time is provided, even if these power supplies are turned off, the data is stored in the memory as the storage means. By adjusting the division ratio of the reference clock based on the relationship between the division ratio and the temperature change, a reference signal synchronized with the standard time can be output. When the surrounding environment changes and the division ratio needs to be adjusted, turn on the power to these means and determine the division ratio again. In this way, if the power supply is intermittently turned on, the power consumption of the entire device can be reduced, and a device with low power consumption can be manufactured.

According to a sixth aspect of the present invention, the scheduler 1) means for receiving a synchronization signal synchronized with the standard time, 2) gate time creation means for creating a gate time from the synchronization signal, 3) reference clock oscillation A power measuring means for measuring a temperature around the means, 4) a voltage measuring means for measuring a power supply voltage applied to the reference clock oscillating means, 5) a synchronizing signal generating means for generating a synchronizing signal synchronized with the standard time, and a power on / off of the synchronizing signal. If control can be performed, these means can be turned on only for a pre-scheduled time, and the power consumption of the entire device can be reduced.

A microprocessor is integrally incorporated,
If the control signal of the microprocessor controls at least one of the means described in claim 1, claim 2, claim 3, claim 4, claim 5 or claim 6, the reference signal generator is a hardware. The structure of the ware is simplified and the printed circuit board can be made smaller. In this case, a small reference signal generator that outputs an external signal input from an external device or a reference signal synchronized with the standard time can be manufactured.

With the reference signal generator according to the present invention,
Even if the reception status of radio waves transmitted from communication satellites or terrestrial transmitting stations is poor and a signal synchronized with the standard time cannot be obtained, the relational expression between the frequency division ratio and the temperature change stored in the memory as storage means Based on the above, even when the temperature around the reference signal generator changes, the frequency division ratio of the reference clock can be adjusted using the information on the temperature change measured by the temperature measuring means. A reference signal synchronized with can be output.

After a long time, the electronic components used as the reference clock oscillating means deteriorate, their characteristics change, and the output frequency of the reference clock oscillating means changes. Even in such a case, in the case of the reference signal generator according to the present invention, the frequency dividing ratio is changed by the dividing ratio changing means while the synchronization signal synchronized with the standard time is input, so that the electronic signal can be changed. A reference signal synchronized with the standard time can be output according to changes in the characteristics of the parts, eliminating the need to calibrate the output frequency of the reference clock.

The means constituting the present invention can be made into an IC and can be miniaturized. If the reference signal generator is made into an IC, it can be easily incorporated into a measuring device or a control device.

[0036]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram showing an entire configuration of a reference signal generator according to a first embodiment of the present invention.

As shown in FIG. 1, the reference signal generator 30
Is a device for outputting a frequency-divided signal 9 synchronized with the synchronization signal 1 synchronized with the external signal. The signal receiving means 2 for the synchronization signal 1 synchronized with the external signal, and a gate for generating a gate time from the input synchronization signal. Time generating means 3, reference clock oscillating means 4 for oscillating a reference clock 5, counting means 6 for counting the reference clock 5 by the means within a gate time, and latch means 7 for latching the count value by the counting means 6 Frequency dividing means 8 for dividing the reference clock 5 to output a frequency-divided signal 9; frequency dividing ratio changing means 10 for changing the frequency dividing ratio for dividing the reference clock 5;
Temperature measuring means 11 for measuring the temperature around the reference clock oscillating means 4; storage means 12 for storing the relationship between the temperature measured by the temperature measuring means 11 and the count value latched during the gate time; And a calculating means 13 for obtaining a frequency division ratio based on the data stored in the storage means 12.

The reference signal generator 3 configured as described above
At 0, a gate time is created from a synchronization signal synchronized with an external signal, and the output frequency of the reference clock 5 is counted within the gate time. The magnitude of the count value obtained at this time corresponds to the frequency change of the reference clock 5, and
The dividing means for dividing the reference clock 5 is determined by the calculating means 13 in accordance with the magnitude of the count value.
The time interval for outputting the frequency-divided signal 9 is shortened or lengthened by 0, and the output time of the frequency-divided signal 9 as a reference signal is synchronized with an external signal.

In the following, a counter is used as the frequency dividing means 8,
An example in which a comparator is used as the dividing ratio changing means 10 will be specifically described. In this example, the bit of the counter and the bit of the comparator are compared while inputting the reference clock, and the counter is reset when the output bit of the counter matches the comparison bit of the comparator. Counting is continued until the value of the counter reaches the value set in the comparator, so a frequency-divided signal is output at regular intervals. By changing the combination of bits to be compared, the length of time to reset the counter can be adjusted, and the interval at which the divided signal as the reference signal is output can be changed.

(Second Embodiment) FIG. 2 shows a reference signal generator 40 according to a modification of the first embodiment of the present invention. The configuration of the present embodiment is almost the same as that of the first embodiment, except that a crystal temperature sensor 14 is used for the temperature measuring means 11 for measuring the temperature around the reference clock oscillating means 4. Is different from the first embodiment in that a voltage measuring means 15 for measuring a power supply voltage applied to the first embodiment is added to the components.

The temperature around the reference clock oscillating means 4 can be measured by using the crystal temperature sensor 14 having good measurement accuracy,
The voltage measuring means 15 for measuring the power supply voltage measures the power supply voltage applied to the reference clock oscillating means 4, and obtains the relationship between the temperature change and the fluctuation of the power supply voltage and the dividing ratio for dividing the oscillation frequency of the reference clock. Then, the frequency division ratio is changed and the frequency division output is output in synchronization with the external signal while the relationship is stored in the storage means 12. If the relationship between the rate of temperature change or fluctuation of the power supply voltage and the frequency division ratio is obtained, the optimal power distribution can be determined based on the stored relationship even if the external device is turned off and no synchronization signal is input to reduce power consumption. The frequency ratio can be determined, and the frequency-divided signal 9 as a reference signal can be periodically output in synchronization with an external signal.

(Third Embodiment) FIG. 3 shows a reference signal generator 50 according to a modification of the first embodiment of the present invention. The configuration of the present embodiment is almost the same as that of the second embodiment, except that a synchronizing signal generating means 1 for generating a synchronizing signal synchronized with the standard time.
6. The second embodiment differs from the second embodiment in that a power supply 17 capable of turning on the power intermittently, a scheduler 18 for scheduling the on / off control of the power supply 17 and a microprocessor 19 are added to the components. The synchronization signal creation means 16 for creating a synchronization signal synchronized with the standard time receives the radio wave 20 transmitted from a communication satellite or a ground station, creates a signal synchronized with the standard time, and generates a signal based on the signal. The frequency division ratio for dividing the oscillation frequency of the reference clock 5 is changed, and the frequency division signal 9 as the reference signal is synchronized with the standard time. In this case, the temperature around the reference clock oscillator is measured, and the division ratio is determined while measuring the power supply voltage.

For a while after the power is turned on to the reference signal generator 50 according to this embodiment, the relationship between the power supply voltage applied to the reference clock oscillating means 4 and the surrounding temperature and the dividing ratio is obtained and stored in the storage means 12. The divided signal 9 is output in synchronization with the standard time. After a certain period of time, the optimum division ratio for synchronizing the divided signal 9 with the standard time can be estimated from the measurement results of the power supply voltage and the temperature change. For this reason,
Synchronization signal creation means 1 for creating a signal synchronized with standard time
6, receiving means 2 for receiving a synchronizing signal, gate signal creating means 3 for creating a gate signal, temperature measuring means 11 for measuring temperature (in this embodiment, a quartz temperature sensor 14 is used),
Even if the means such as the voltage measuring means 15 for measuring the power supply voltage is not operated continuously, the power supply 17 is controlled by the scheduler 18 and if necessary these means are operated intermittently as a reference signal. Can be output in synchronization with the standard time, and the power consumption can be reduced. Further, by controlling each means constituting the reference signal generating device 50 with the control signal of the microprocessor 19, a small measuring device can be manufactured.

On the other hand, when the standard time transmitted as a radio wave is used as an external signal, even if the reception time of the radio wave is bad and the standard time transmitted cannot be received, the standard time based on the stored time is used. An optimal frequency division ratio can be determined, and a frequency-divided signal 9 as a reference signal can be periodically output in synchronization with a standard time.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a reference signal generator according to a first embodiment.

FIG. 2 is a diagram showing an entire configuration of a reference signal generator according to a second embodiment.

FIG. 3 is a diagram showing an overall configuration of a reference signal generator according to a third embodiment.

FIG. 4 is a view for explaining a method of changing a frequency division ratio of a reference clock and making a frequency-divided signal coincide with a synchronization signal;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synchronous signal 2 Signal receiving means 3 Gate signal creating means 4 Reference clock oscillating means 5 Reference clock 6 Counting means 7 Latch means 8 Dividing means 9 Dividing signal 10 Dividing ratio changing means 11 Temperature measuring means 12 Storage means 13 Arithmetic means Reference Signs List 14 crystal temperature sensor 15 voltage measuring means 16 synchronizing signal creating means 17 power supply 18 scheduler 19 microprocessor 20 radio wave 30 reference signal generator 40 reference signal generator 50 reference signal generator

Claims (7)

[Claims] 1. A reference signal generator for generating a reference signal synchronized with an external signal, comprising: signal receiving means for receiving a synchronization signal synchronized with an external signal; and a gate time generator for generating a gate time from the synchronization signal. Means, reference clock oscillating means for oscillating a reference clock, counting means for counting the reference clock within the gate time, latch means for latching the count value of the counting means, and frequency dividing the reference clock. Frequency dividing means for outputting a frequency dividing signal, frequency dividing ratio changing means for changing the frequency dividing ratio of the frequency dividing means, temperature measuring means for measuring the temperature around the reference clock oscillating means, and the temperature measuring means Storage means for storing the relationship between the temperature measured in step (1) and the count value latched within the gate time, and an operation for obtaining a frequency division ratio based on the stored data. And a calculating means. 2. The reference signal generator according to claim 1, wherein a crystal temperature sensor is used as the temperature measuring means. 3. The reference signal generator according to claim 1, further comprising a voltage measuring means for measuring a power supply voltage applied to said reference clock oscillating means. 4. A synchronizing signal generating means for generating a signal synchronized with a standard time transmitted as a radio wave from a communication satellite or a terrestrial transmitting station is integrated. The reference signal generator according to claim 2 or claim 3. 5. A signal receiving means for receiving the synchronization signal according to claim 1, a gate time generating means for generating a gate time according to claim 1, and a temperature around the reference clock oscillating means according to claim 1. Driving a temperature measuring means for measuring, a voltage measuring means for measuring a power supply voltage applied to the reference clock oscillating means according to claim 3, and a synchronizing signal generating means for generating a synchronizing signal synchronized with a standard time according to claim 4. 5. The reference signal generator according to claim 1, further comprising a power supply, wherein the power supply can be turned on intermittently. 6. The reference signal generator according to claim 5, further comprising a scheduler for scheduling the on / off control of the power supply according to claim 5. 7. The microprocessor according to claim 1, wherein the microprocessor is integrally incorporated and a control signal of the microprocessor is provided.
Claim 2, Claim 3, Claim 4, Claim 5 or Claim 6
A reference signal generator, characterized in that at least one of the means according to (1) is controlled.