CN102916654A - Crystal oscillator ageing compensation method - Google Patents
Crystal oscillator ageing compensation method Download PDFInfo
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- CN102916654A CN102916654A CN2012104119788A CN201210411978A CN102916654A CN 102916654 A CN102916654 A CN 102916654A CN 2012104119788 A CN2012104119788 A CN 2012104119788A CN 201210411978 A CN201210411978 A CN 201210411978A CN 102916654 A CN102916654 A CN 102916654A
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Abstract
The invention provides a crystal oscillator ageing compensation method. By the method, crystal oscillator ageing is compensated by the aid of the ageing law of crystal oscillators, and a typical structure consists of a timing device, a computing unit, a storage unit and a crystal oscillator, wherein the timing device is used for recording use time of the crystal oscillator, the computing unit is used for fitting an ageing curve according to the crystal oscillator use time and a storage unit value and generating compensation data, and the storage unit is used for storing ageing values of the crystal oscillator which is a component to be compensated.
Description
Technical field
The present invention relates to electronic technology field, for crystal oscillator aging provides a kind of compensation method, can be used for the compensation of ageing of the various crystal oscillators such as common quartz crystal oscillator, VCXO, temperature compensating crystal oscillator, constant-temperature crystal oscillator.
Background technology
Quartz crystal oscillator is the oscillator of a kind of high accuracy and high stability, be widely used in all kinds of oscillating circuits such as TV, computer, and be used for frequency generator in the communication system, provide reference signal for the data processing equipment clocking with for particular system.International Electrotechnical Commission is common crystal oscillation (SPXO), voltage type crystal oscillator (VCXO), temp. compensation type crystal oscillation (TCXO), thermostatic control formula crystal oscillation (OCXO).At present developing also have digit compensated crystal to decrease vibration (DCXO) microcomputer compensation crystal oscillator (MCXO) etc.
Although constant-temperature crystal oscillator, computer compensation crystal oscillator etc. all have very high precision, its in use output frequency As time goes on can change Here it is crystal oscillator aging.The aging meeting of crystal oscillator causes the deviation of crystal oscillator output frequency, the present general aging error of bringing of method compensation of carrying out primary calibration every a period of time that adopts, and for example high-precision instrument generally will arrive producer every a period of time and calibrate once.But some application scenario is not suitable for this method, needs equipment and the device of long-term operation such as AEROSPACE APPLICATION or some.
The present invention has proposed a kind of aging method of crystal oscillator that compensates with regard to above crystal oscillator problem of aging, can be applied to various crystal oscillators, for its aging compensating.
Summary of the invention
The technical problem that (one) will solve:
In order to solve the aging problem that affects on frequency of crystal oscillator, the present invention proposes a kind of aging method of crystal oscillator that compensates, the aging frequency error that brings of the method auto-compensation crystal oscillator within the time of setting reaches the purpose of automatic calibration.
Of the present invention for the aging method of compensation crystal oscillator, its method is to utilize known crystal oscillator aging rule that the aging of crystal oscillator compensated.Typical structure forms time set, computing unit, memory cell and crystal oscillator four parts by four parts and forms, and the time set recording time information is also sent into computing unit; Computing unit is according to crystal oscillator service time and storage unit values carrying out the aging curve match, the production offset data, send into by the compensating part crystal oscillator, memory cell is used for the aging value of storage crystal oscillator, crystal oscillator is by compensating part, interconnecting of computing unit, time set, memory cell and crystal oscillator, the functional circuit of composition crystal oscillator compensation of ageing.Wherein the time set major function is the service time of record crystal oscillator, can be real-time clock; The computing unit major function is the aging value according to crystal oscillator service time and memory cell, match and dope offset, this unit can be MCU, the memory cell major function is storage crystal oscillator aging value, this unit can be EEPROM, crystal oscillator can be VCXO, temperature compensating crystal oscillator, constant-temperature crystal oscillator, also can make common quartz crystal oscillator.The offset of computing unit output can be that digital quantity also can be analog quantity, can compensate with the load capacitance of crystal oscillator, so that crystal oscillator reaches more accurately frequency output, wherein cell stores is the aging value that disperses.According to requirements, the aging real-time clock make-up time can be done intermittent the repairing by the fixed time section as required by being set in advance in the clock circuit, repairs once or repairs once in 3 months such as 1 month.In addition, contain temperature sensor in this device, the compensation of ageing algorithm can according to the temperature ageing time statistic of living in of temperature sensor, namely according to the ambient condition time of serviceability temperature, write different compensation of ageing algorithms.Certainly, in addition for different crystalline materials, structure, packing forms, the backoff algorithm that shows is different.
(2) technical scheme
Be a kind of structure chart that compensates the aging method of crystal oscillator provided by the invention shown in Fig. 1, this structure comprises: time set 100, computing unit 200, memory cell 300 and crystal oscillator 400.The temporal information that computing unit is exported according to time set is looked into the aging value of memory cell, and calculates offset according to aging value, thereby crystal oscillator is compensated.
We can be by relative short time accelerated aging test when implementing the compensation of ageing of temperature compensating crystal oscillator, and in superhigh temperature, ultralow temperature and easy oxidation environment, equivalence goes out the aging rule of long-term crystal oscillator, accelerates the experimental verification of algorithm.
A kind of instantiation pattern that compensates the aging method of crystal oscillator is provided in Fig. 2,
Fig. 3 has showed three kinds of typical crystal oscillator aging curve figure.
Description of drawings
A kind of structure chart that compensates the aging method of crystal oscillator of Fig. 1;
A kind of instantiation that compensates the aging method of crystal oscillator of Fig. 2;
Three kinds of typical aging curve figure of Fig. 3;
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 2 is a kind of instantiation that compensates the aging method of crystal oscillator, and this example comprises:
Real-time clock, poor by current time and crystal oscillator cut-in time are done for generation of the current time, can obtain service time of this crystal oscillator; EEPROM is for the aging value of storing tested VCXO every month (perhaps annual); MCU, the current time that produces according to real-time clock obtains the service time of VCXO, and according to the aging value value of being compensated of storing among the EEPROM, can carry out at set intervals single compensation according to setting, and offset is sent into VCXO; VCXO is by compensating part, for generation of output frequency more accurately.
The below describes its operation principle in detail: because can be owing to the aging output frequency that makes is forbidden after the long-time application of crystal oscillator process, Fig. 3 is typical crystal oscillator aging curve.We utilize the aging rule of crystal oscillator to build bucking-out system the aging of crystal oscillator are compensated, as shown in Figure 2.Real-time clock produces the current time after the system works, and temporal information is sent into MCU by bus.What store among the EEPROM is the information of Fig. 3 curve, but because the EEPROM size is limited, so its storage is limited discrete aging value.MCU simulates the offset of needs according to aging value among temporal information and the EEPROM, and offset is sent into VCXO compensates VCXO, reaches the more stable purpose of crystal oscillator output.
Claims (10)
1. one kind is used for the aging method of compensation crystal oscillator, it is characterized in that the method is to utilize known crystal oscillator aging rule that the aging of crystal oscillator compensated, typical structure forms time set, computing unit, memory cell and crystal oscillator four parts by four parts and forms, and the time set recording time information is also sent into computing unit; Computing unit is according to crystal oscillator service time and storage unit values carrying out the aging curve match, the production offset data, send into by the compensating part crystal oscillator, memory cell is used for the aging value of storage crystal oscillator, crystal oscillator is by compensating part, interconnecting of computing unit, time set, memory cell and crystal oscillator, the functional circuit of composition crystal oscillator compensation of ageing.
2. require according to right 1 that described a kind of its characteristics are that the time set major function is the service time of record crystal oscillator for the aging method of compensation crystal oscillator, this device can be real-time clock.
3. require according to right 1 that described a kind of its characteristics are that the computing unit major function is the aging value according to crystal oscillator service time and memory cell for the aging method of compensation crystal oscillator, match and dope offset, this unit can be MCU.
4. require described a kind ofly for the aging method of compensation crystal oscillator according to right 1, its characteristics are that the memory cell major function is storage crystal oscillator aging value, and this unit can be EEPROM.
5. require described a kind ofly for the aging method of compensation crystal oscillator according to right 1, its characteristics are that crystal oscillator can be VCXO, temperature compensating crystal oscillator, constant-temperature crystal oscillator, also can make common quartz crystal oscillator.
6. require described a kind ofly for the aging method of compensation crystal oscillator according to right 1, its characteristics are that the offset of computing unit output can be that digital quantity also can be analog quantity.
7. require described a kind ofly for the aging method of compensation crystal oscillator according to right 1, its characteristics are, the method is that the load capacitance to crystal oscillator compensates, so that crystal oscillator reaches more accurately frequency output.
8. require described a kind ofly for the aging method of compensation crystal oscillator according to right 1, its characteristics are, cell stores be the aging value that disperses.
9. require described a kind of for the aging method of compensation crystal oscillator according to right 1, power, right 3, right 4, right 5, right 6, right 7 and right 8, its characteristics are, the aging real-time clock make-up time can by being set in advance in the clock circuit, be done intermittent the repairing by the fixed time section as required.
10. require described a kind of for the aging method of compensation crystal oscillator according to right 1, power, right 3, right 4, right 5, right 6, right 7 and right 8, its characteristics are, contain temperature sensor in this device, the compensation of ageing algorithm can according to temperature sensor add up crystal oscillator temperature ageing time of living in statistic, write the compensation of ageing algorithm.
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| CN2012104119788A CN102916654A (en) | 2012-10-25 | 2012-10-25 | Crystal oscillator ageing compensation method |
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| CN2012104119788A CN102916654A (en) | 2012-10-25 | 2012-10-25 | Crystal oscillator ageing compensation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572698A (en) * | 2016-01-18 | 2016-05-11 | 郑州威科姆科技股份有限公司 | Form-coupling-based time service maintenance method for satellite receiver |
| CN106248542A (en) * | 2016-08-16 | 2016-12-21 | 广东欧珀移动通信有限公司 | A kind of detect the method for air quality, device and terminal |
| CN107733368A (en) * | 2017-09-07 | 2018-02-23 | 西安电子科技大学 | Intelligent aging compensation approach based on statistical batch production constant-temperature crystal oscillator |
| CN108168669A (en) * | 2018-02-12 | 2018-06-15 | 西南交通大学 | A kind of weighing device of cargo vehicle |
| CN110113005A (en) * | 2019-04-11 | 2019-08-09 | 深圳市金科泰通信设备有限公司 | 5G standard source high-frequency crystal oscillator circuit |
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| US20050168255A1 (en) * | 2004-02-04 | 2005-08-04 | Gauthier Claude R. | Compensation technique to mitigate aging effects in integrated circuit components |
| CN101541073A (en) * | 2009-04-28 | 2009-09-23 | 安徽省电力科学研究院 | Method for compensating network node crystal oscillation frequency error of wireless sensor |
| CN102739158A (en) * | 2012-07-04 | 2012-10-17 | 上海鸿晔电子科技有限公司 | Aging compensating circuit of constant temperature crystal oscillator |
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2012
- 2012-10-25 CN CN2012104119788A patent/CN102916654A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050168255A1 (en) * | 2004-02-04 | 2005-08-04 | Gauthier Claude R. | Compensation technique to mitigate aging effects in integrated circuit components |
| CN101541073A (en) * | 2009-04-28 | 2009-09-23 | 安徽省电力科学研究院 | Method for compensating network node crystal oscillation frequency error of wireless sensor |
| CN102739158A (en) * | 2012-07-04 | 2012-10-17 | 上海鸿晔电子科技有限公司 | Aging compensating circuit of constant temperature crystal oscillator |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572698A (en) * | 2016-01-18 | 2016-05-11 | 郑州威科姆科技股份有限公司 | Form-coupling-based time service maintenance method for satellite receiver |
| CN105572698B (en) * | 2016-01-18 | 2018-02-23 | 郑州威科姆科技股份有限公司 | A kind of DVB time service keeping method based on form matching |
| CN106248542A (en) * | 2016-08-16 | 2016-12-21 | 广东欧珀移动通信有限公司 | A kind of detect the method for air quality, device and terminal |
| CN107733368A (en) * | 2017-09-07 | 2018-02-23 | 西安电子科技大学 | Intelligent aging compensation approach based on statistical batch production constant-temperature crystal oscillator |
| CN108168669A (en) * | 2018-02-12 | 2018-06-15 | 西南交通大学 | A kind of weighing device of cargo vehicle |
| CN108168669B (en) * | 2018-02-12 | 2023-11-03 | 西南交通大学 | Weighing device for goods of truck |
| CN110113005A (en) * | 2019-04-11 | 2019-08-09 | 深圳市金科泰通信设备有限公司 | 5G standard source high-frequency crystal oscillator circuit |
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