CN104702214B - A kind of method of crystal oscillator frequency compensation - Google Patents
A kind of method of crystal oscillator frequency compensation Download PDFInfo
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- CN104702214B CN104702214B CN201410851670.4A CN201410851670A CN104702214B CN 104702214 B CN104702214 B CN 104702214B CN 201410851670 A CN201410851670 A CN 201410851670A CN 104702214 B CN104702214 B CN 104702214B
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Abstract
The invention discloses a kind of method of crystal oscillator frequency compensation, methods described includes：The operating temperature range of crystal oscillator is divided into multiple temperature ranges, during synchronization, establish the working time of the crystal oscillator of each temperature range and the corresponding relation of frequency drift, during holding, crystal oscillator current working time and operating temperature are obtained in real time, working time corresponding to acquisition and the corresponding relation of frequency drift, the compensation of ageing frequency provided according to needed for current working time and the corresponding relation of corresponding working time and frequency drift determine crystal oscillator.The present invention distinguishes the influence that operating temperature is brought to frequency drift, and so as to preferably compensate, the precision of the temperature sensor of the operating temperature to monitoring crystal oscillator in real time not only increases the accuracy of compensation, and reduce cost without too high demand.
Description
Technical field
The present invention relates to crystal oscillator technologies field, more particularly to a kind of method of crystal oscillator frequency compensation.
Background technology
The compensation device of existing crystal oscillator, typically mended by crystal oscillator module, temperature sensor module, temperature
Repay processing module and oscillator control module composition.
In the temperature sensor module near quartz crystal, thermistor perceives temperature change, is converted into voltage
Signal, inputs to temperature compensation module, and temperature compensation module generates phase according to operating temperature-frequency curve of crystal oscillator
The thermal compensation signal answered, to control the concussion frequency of crystal oscillator.
The compensation method of existing crystal oscillator is：In two sections of continuous working time sections, writing task temperature, work
Three parameters of time and frequency, according to the difference acquisition module aging of the frequency of two working time sections under identical operating temperature point
The relation of parameter, i.e. working time and frequency；And in a fixed working time section, obtained according to the parameter of module aging
To the ageing parameter in the working time section, then by three operating temperature, working time and frequency parameters, obtain operating temperature and draw
The frequency change risen, the i.e. relation of operating temperature and frequency；Then, according to working time and the relation and operating temperature of frequency
It is modeled with the relation of frequency, obtains the model of compensation frequency when crystal oscillator works.
Need to ensure that the operating temperature measured value of temperature sensor is accurate using the program, and in temperature-compensating processing module
Operating temperature-frequency curve it is correct, such temperature-compensating processing module could export correct frequency compensation value.But big
In sizable application, each temperature sensor has discreteness, and there is also discrete for operating temperature-frequency curve of crystal oscillator
Property, it is necessary to calibrated to them, working time when this calibration in wide operating temperature range is to large-scale production and
Production cost has significant impact.
The content of the invention
The embodiment of the present invention provides a kind of method of crystal oscillator frequency compensation, to solve above technical problem.
To use following technical scheme up to this purpose, the present invention：
The embodiment of the present invention provides a kind of method of crystal oscillator frequency compensation, including：
The operating temperature range of crystal oscillator is divided into multiple temperature ranges；
During synchronization, the working time of the crystal oscillator of each temperature range and the corresponding relation of frequency drift are established；
During holding, crystal oscillator current working time and operating temperature are obtained in real time；
It is determined that temperature range corresponding to current operating temperature；
The corresponding relation of working time and frequency drift according to corresponding to obtaining the temperature range of determination；
Crystal oscillation is determined according to current working time and the corresponding relation of corresponding working time and frequency drift
The compensation of ageing frequency provided needed for device.
Preferably, the step：During synchronization, the working time for establishing the crystal oscillator of each temperature range floats with frequency
The corresponding relation of shifting, is specifically included：
During synchronization, sampling crystal oscillator obtains each temperature in each temperature range, the frequency drift under the different operating time
Spend multiple working times in section and the corresponding data of frequency drift；
According to multiple working times of each temperature range and the corresponding data of frequency drift, the crystal of each temperature range is established
The working time of oscillator and the corresponding relation of frequency drift.
Preferably, the step：According to multiple working times of each temperature range and the corresponding data of frequency drift, establish
The working time of the crystal oscillator of each temperature range and the corresponding relation of frequency drift, are specifically included：
Multiple corresponding datas of each temperature range are fitted respectively, obtain the work of the crystal oscillator of each temperature range
Make the corresponding relation of Time And Frequency drift.
Preferably, the step：The working time for establishing the crystal oscillator of each temperature range is corresponding with frequency drift
After relation, in addition to：
Crystal oscillation is established according to the corresponding relation of the working time of the crystal oscillator of each temperature range and frequency drift
The operating temperature of device and the corresponding relation of drift frequency.
Preferably, the step：It is corresponding with frequency drift according to the working time of the crystal oscillator of each temperature range
Relation establishes the operating temperature of crystal oscillator and the corresponding relation of drift frequency, specifically includes：
According to the working time of the crystal oscillator of each temperature range and the corresponding relation of frequency drift, crystal oscillation is obtained
The associated data of multiple nominal temperatures and frequency drift of the device under the identical working time；
According to the associated data of the multiple nominal temperatures and frequency drift of acquisition, establish the operating temperature of crystal oscillator with
The corresponding relation of frequency drift；
Wherein, each temperature range includes a minimum temperature, a maximum temperature and a nominal temperature；Nominal temperature is minimum
The average value of temperature and maximum temperature, the maximum temperature of each temperature range are identical with the difference of minimum temperature.
Preferably, the step：It is corresponding with frequency drift according to current working time and corresponding working time
After relation determines the compensation of ageing frequency of offer needed for crystal oscillator, in addition to：
It is corresponding with frequency drift according to the operating temperature of the current operating temperature of crystal oscillator and crystal oscillator
Relation determines the temperature compensating frequency provided needed for crystal oscillator.
Preferably, the step：According to the current operating temperature of crystal oscillator and the operating temperature of crystal oscillator
After the temperature compensating frequency that is provided needed for crystal oscillator being determined with the corresponding relation of frequency drift, in addition to：According to determination
Compensation of ageing frequency and temperature compensating frequency obtain the current desired compensation frequency of crystal oscillator.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought：The present invention is by establishing each temperature during synchronization
The working time of the crystal oscillator in section and the model of the corresponding relation of frequency drift, i.e. frequency aging, it is first during holding
The temperature range belonging to operating temperature is first determined, working time and frequency corresponding to the temperature range acquisition according to belonging to operating temperature
The corresponding relation of rate drift, and then the compensation of ageing frequency of crystal oscillator is determined, to distinguish operating temperature to frequency drift
The influence brought, the influence that operating temperature brings to frequency drift can also be obtained by the model of each frequency aging of foundation,
The final required compensation frequency for determining crystal oscillator, it is brilliant to monitoring in real time using this method so as to preferably compensate
The precision of the temperature sensor of the operating temperature of oscillation body device not only increases the accuracy of compensation, and drop without too high demand
Low cost.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, it can also be implemented according to the present invention
The content of example and these accompanying drawings obtain other accompanying drawings.
Fig. 1 is the frequency compensated method flow diagram of crystal oscillator provided in an embodiment of the present invention.
Fig. 2 is working time and the corresponding relation curve of frequency drift of crystal oscillator provided in an embodiment of the present invention
Figure.
Fig. 3 is the method flow diagram of the temperature-compensating of crystal oscillator provided in an embodiment of the present invention.
Embodiment
For make present invention solves the technical problem that, the technical scheme that uses and the technique effect that reaches it is clearer, below
The technical scheme of the embodiment of the present invention will be described in further detail with reference to accompanying drawing, it is clear that described embodiment is only
It is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art exist
Acquired every other embodiment under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is refer to, Fig. 1 is the method flow diagram of crystal oscillator frequency compensation provided in an embodiment of the present invention.The party
Method includes：
S110, clock are synchronous.
Clock is synchronous, that is, passes through GPS (Global Positioning System, global positioning system) or upper level clock
Give crystal oscillator one standard signal, the control circuit of crystal oscillator makes crystal oscillator according to this standard signal
Output signal and this standard signal synchronize, and this process is referred to as the synchronous process of clock, or are locking GPS or higher level
Clock.
S120, the operating temperature range of crystal oscillator is divided into multiple temperature ranges.
During synchronization, temperature change when collection crystal oscillator works, the operating temperature of crystal oscillator is obtained
Scope；Obtained operating temperature range is divided into multiple temperature ranges；Each temperature range includes a minimum temperature, a highest
Temperature and a nominal temperature；Nominal temperature is the average value of minimum temperature and maximum temperature, the maximum temperature of each temperature range with
The difference of minimum temperature is identical.
It is Celsius by -25 if the operating temperature range of crystal oscillator is -25 degrees Celsius to 75 degrees Celsius in the present embodiment
The scope spent to 75 degrees Celsius is divided into 100 sections, then 1 degree Celsius is a temperature range.
Temperature range can be numbered, such as：- 25 degrees Celsius to -24 degrees Celsius are the first temperature range, -24 degrees Celsius
It is second temperature section etc. to -23 degrees Celsius.
S130, the working time of crystal oscillator for establishing each temperature range and the corresponding relation of frequency drift.
During synchronization, the current frequency drift of crystal oscillator is obtained in real time, and it is real by timer and temperature sensor
When sample crystal oscillator current working time and operating temperature, obtain multiple work of the crystal oscillator in each temperature range
The corresponding data of Time And Frequency drift, by the corresponding data of multiple working times of acquisition and frequency drift according to operating temperature
Affiliated temperature range is classified, such as：First temperature range if -25 degrees Celsius to -24 degrees Celsius, by operating temperature -
The multiple working times obtained during 25 degrees Celsius to -24 degrees Celsius section changes and the corresponding data of frequency drift are labeled as first
The corresponding data of temperature range；Similarly, second temperature section is if -24 degrees Celsius to -23 degrees Celsius, by operating temperature -24
The multiple working times obtained when degree Celsius changing to -23 degrees Celsius of sections and the corresponding data of frequency drift are labeled as the second temperature
Spend the corresponding data in section；The like, complete the corresponding data to multiple working times and frequency drift and each temperature range
Correspondence markings.
According to multiple working times of each temperature range and the corresponding data of frequency drift, the crystal of each temperature range is established
The working time of oscillator and the corresponding relation of frequency drift, it is specially：
Multiple corresponding datas of each temperature range are fitted respectively, obtain the work of the crystal oscillator of each temperature range
Make the corresponding relation of Time And Frequency drift.
The numbering of the corresponding relation of each temperature range working time and frequency drift and each temperature range is corresponded
Come, be stored in the memory of crystal oscillator.
Fig. 2 is refer to, Fig. 2 is that the working time of crystal oscillator provided in an embodiment of the present invention is corresponding with frequency drift
Graph of relation.
Region between two the second curves is a temperature range of setting, has multiple sampled points in the temperature range,
The sampled point is the working time obtained and the corresponding data of frequency drift or sampled data.The temperature according to first curve
The matched curve that the multiple sampled points or corresponding data in section generate after being fitted, the matched curve is crystal oscillator
Working time and the corresponding relation curve of frequency drift.In the present embodiment, the temperature range each divided in advance is corresponding one
Matched curve, each temperature range are equipped with a unique nominal temperature, i.e., the corresponding fitting of each nominal temperature is bent
Line.Intend as the first temperature range corresponds to matched curve y1, second temperature section corresponds to matched curve y2, N temperature ranges are corresponding
Close curve yn etc..
S140, cancellation are synchronous without clock.
Into the phase of holding.The holding phase loses the working hour of GPS or upper level clock, crystal oscillator work for crystal oscillator
When making in the period, i.e., when crystal oscillator is worked in during holding, output signal is no longer same in real time with GPS or upper level clock
Step.
S150, crystal oscillator current working time and operating temperature are obtained in real time.
Crystal oscillator current working time and work temperature are obtained by equipment such as temperature sensor, timers in real time
Degree.
S160, determine temperature range corresponding to current operating temperature.
The temperature range according to corresponding to determining current operating temperature.
S170, the corresponding relation of working time and frequency drift according to corresponding to obtaining the temperature range of determination
Behind temperature section, searched according to the numbering of temperature range from memory and obtain the corresponding working time
With the corresponding relation of frequency drift.
S180, the compensation of ageing frequency that offer needed for crystal oscillator is provided.
The working time corresponding with temperature range obtained according to the current working time and from memory and frequency
The corresponding relation of drift, calculate the compensation of ageing frequency for obtaining and being provided needed for crystal oscillator.
S190, the current desired benefit of crystal oscillator obtained according to the compensation of ageing frequency and temperature compensating frequency of determination
Repay frequency.
In the present embodiment, working time and the frequency drift of the crystal oscillator of each temperature range are established during synchronization
The model of corresponding relation, i.e. frequency aging, more accurately and conveniently, into after during holding, it is first determined belonging to operating temperature
Temperature range, temperature range according to belonging to operating temperature obtain corresponding to the corresponding relation of working time and frequency drift,
So as to can determine that the compensation of ageing frequency of crystal oscillator, to distinguish the influence that operating temperature is brought to frequency drift；And work
The relation for making temperature and frequency drift is usually known, and is readily available, it can thus be concluded that the temperature to crystal oscillator is mended
Frequency is repaid, with reference to the influence of both working time and operating temperature to frequency drift, and then obtains the benefit needed for crystal oscillator
Frequency is repaid, using this method, not only increases the accuracy of compensation, and reduce cost.
In addition, the model for each frequency aging for passing through foundation can also obtain the temperature compensating frequency of crystal oscillator, please
With reference to figure 3, Fig. 3 is the method flow diagram of the temperature-compensating of crystal oscillator provided in an embodiment of the present invention, the temperature-compensating
Method includes：
After step s 130, in addition to step S131.
S131, the operating temperature for establishing crystal oscillator and drift frequency corresponding relation.
Crystal oscillation is established according to the corresponding relation of the working time of the crystal oscillator of each temperature range and frequency drift
The operating temperature of device and the corresponding relation of drift frequency, it is specially：
According to the working time of the crystal oscillator of each temperature range and the corresponding relation of frequency drift, crystal oscillation is obtained
The associated data of multiple nominal temperatures and frequency drift of the device under the identical working time.
According to the associated data of the multiple nominal temperatures and frequency drift of acquisition, establish the operating temperature of crystal oscillator with
The corresponding relation of frequency drift.
The frequency of crystal oscillator caused change with the long-term passage of working time, typically in terms of week, the moon or year
Calculate, therefore, influence of the shorter working time to frequency drift can be neglected substantially.Under the selected identical working time, according to
Two nominal temperatures obtain corresponding to two frequency drifts, the difference of two frequency drifts and the difference of two nominal temperatures are one
Associated data, for expressing the variable quantity of the frequency drift under different operating temperature change, after multiple associated datas are got,
The operating temperature of crystal oscillator and the corresponding relation of frequency drift can be established.The selected working time should not be set
It is long, to prevent error caused by frequency aging.
Also include step S181 after step S150.
S181, the temperature compensating frequency that offer needed for crystal oscillator is provided.
It is corresponding with frequency drift according to the operating temperature of the current operating temperature of crystal oscillator and crystal oscillator
Relation determines the temperature compensating frequency provided needed for crystal oscillator, into step S190.
S190, the current desired benefit of crystal oscillator obtained according to the compensation of ageing frequency and temperature compensating frequency of determination
Repay frequency.
Compensation of ageing frequency and temperature compensating frequency can obtain according to the corresponding relation of foundation, needed for crystal oscillator
It is compensation of ageing frequency and temperature compensating frequency sum to compensate frequency.
In the present embodiment, the influence that temperature is come to frequency band is distinguished, establishes the model of frequency aging, and then according to frequency
The model of aging establishes the corresponding relation of operating temperature and frequency drift, obtains temperature compensating frequency, therefore, to real during holding
When monitor crystal oscillator operating temperature temperature sensor precision without too high demand, not only increase the accurate of compensation
Property, and reduce cost.
In the present embodiment, realizing the device of the method for the crystal oscillator frequency compensation of the present embodiment includes：Crystal oscillation
Control circuit, temperature sensor, timer, GPS or the upper level clock of device, micro-control unit etc., wherein, micro-control unit includes
Memory, either more than one processor and one or a more than one program；Wherein, one or more than one
Program storage is configured by one or more than one computing device, one or more than one program in memory
Include the instruction for carrying out above step.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, the program can be stored in a computer-readable storage medium
In matter, storage medium can include memory, disk or CD etc..
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the present invention's
Thought, there will be changes, this specification content should not be construed as to the present invention in specific embodiments and applications
Limitation.
Claims (7)
- A kind of 1. method of crystal oscillator frequency compensation, it is characterised in that including：The operating temperature range of crystal oscillator is divided into multiple temperature ranges；During synchronization, the working time of the crystal oscillator of each temperature range and the corresponding relation of frequency drift are established；During holding, crystal oscillator current working time and operating temperature are obtained in real time；It is determined that temperature range corresponding to current operating temperature；The corresponding relation of working time and frequency drift according to corresponding to obtaining the temperature range of determination；Crystal oscillator institute is determined according to current working time and the corresponding relation of corresponding working time and frequency drift The compensation of ageing frequency that need to be provided.
- 2. according to the method for claim 1, it is characterised in that the step：During synchronization, the crystalline substance of each temperature range is established The working time of oscillation body device and the corresponding relation of frequency drift, are specifically included：During synchronization, sampling crystal oscillator obtains each humidity province in each temperature range, the frequency drift under the different operating time Between multiple working times and frequency drift corresponding data；According to multiple working times of each temperature range and the corresponding data of frequency drift, the crystal oscillation of each temperature range is established The working time of device and the corresponding relation of frequency drift.
- 3. according to the method for claim 2, it is characterised in that the step：During according to multiple work of each temperature range Between corresponding data with frequency drift, the working time for establishing the crystal oscillator of each temperature range corresponding with frequency drift closes System, specifically includes：Multiple corresponding datas of each temperature range are fitted respectively, during the work for the crystal oscillator for obtaining each temperature range Between corresponding relation with frequency drift.
- 4. according to the method for claim 3, it is characterised in that the step：Establish the crystal oscillator of each temperature range Working time and frequency drift corresponding relation after, in addition to：Crystal oscillator is established according to the corresponding relation of the working time of the crystal oscillator of each temperature range and frequency drift The corresponding relation of operating temperature and drift frequency.
- 5. according to the method for claim 4, it is characterised in that the step：According to the crystal oscillator of each temperature range Working time and the corresponding relation of frequency drift establish the operating temperature of crystal oscillator and the corresponding relation of drift frequency, have Body includes：According to the working time of the crystal oscillator of each temperature range and the corresponding relation of frequency drift, obtain crystal oscillator and exist The associated data of multiple nominal temperatures and frequency drift under the identical working time；According to the associated data of the multiple nominal temperatures and frequency drift of acquisition, the operating temperature and frequency of crystal oscillator are established The corresponding relation of drift；Wherein, each temperature range includes a minimum temperature, a maximum temperature and a nominal temperature；Nominal temperature is minimum temperature It is identical with the difference of minimum temperature with the average value of maximum temperature, the maximum temperature of each temperature range.
- 6. according to the method for claim 5, it is characterised in that the step：According to the current working time and correspondingly Working time and frequency drift corresponding relation the compensation of ageing frequency that provides needed for crystal oscillator is provided after, also wrap Include：According to the current operating temperature of crystal oscillator and the operating temperature of crystal oscillator and the corresponding relation of frequency drift The temperature compensating frequency provided needed for crystal oscillator is provided.
- 7. according to the method for claim 6, it is characterised in that the step：According to the current work temperature of crystal oscillator The temperature that degree and the operating temperature of crystal oscillator and the corresponding relation of frequency drift determine to provide needed for crystal oscillator is mended After repaying frequency, in addition to：The current institute of crystal oscillator is obtained according to the compensation of ageing frequency and temperature compensating frequency of determination The compensation frequency needed.
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| JP6756173B2 (en) * | 2016-01-06 | 2020-09-16 | セイコーエプソン株式会社 | Circuits, oscillators, electronics and mobiles |
| CN108227471B (en) * | 2016-12-21 | 2019-11-12 | 展讯通信（上海）有限公司 | GPS shares the calibration method and device of clock |
| CN108613753B (en) * | 2018-01-05 | 2021-01-15 | 京东方科技集团股份有限公司 | Temperature measuring method and device, storage medium, and temperature measuring device inspection method |
| CN110336557B (en) * | 2019-06-24 | 2023-05-30 | Oppo广东移动通信有限公司 | Frequency compensation method, terminal and storage medium |
| CN110544875A (en) * | 2019-09-09 | 2019-12-06 | 衢州职业技术学院 | Optical modulation device and method of vertical cavity surface laser with grating |
| CN110750124A (en) * | 2019-09-24 | 2020-02-04 | 成都恒晶科技有限公司 | Adjustable and controllable analog temperature voltage compensation method |
| CN117353732B (en) * | 2023-11-08 | 2024-04-16 | 武汉非秒迅连科技有限公司 | Constant-temperature crystal oscillator temperature compensation method and device |
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| CN1535501A (en) * | 2001-05-16 | 2004-10-06 | Reference oscillator with automatic compensation for aging and temp | |
| CN101008672A (en) * | 2005-11-29 | 2007-08-01 | 联发科技股份有限公司 | GPS receiver devices and compensation methods therefor |
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