CN102522949A - Temperature compensation apparatus of constant temperature crystal oscillation circuit - Google Patents
Temperature compensation apparatus of constant temperature crystal oscillation circuit Download PDFInfo
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- CN102522949A CN102522949A CN2011104294250A CN201110429425A CN102522949A CN 102522949 A CN102522949 A CN 102522949A CN 2011104294250 A CN2011104294250 A CN 2011104294250A CN 201110429425 A CN201110429425 A CN 201110429425A CN 102522949 A CN102522949 A CN 102522949A
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- microprocessor
- constant temperature
- crystal oscillating
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Abstract
The invention discloses a temperature compensation apparatus of a constant temperature crystal oscillation circuit. The temperature compensation apparatus comprises a microprocessor, a voltage stabilizing circuit, an oscillator circuit, a heater circuit, and an amplification output circuit. A constant temperature sensor and an environmental temperature sensor are respectively connected with the microprocessor; the voltage stabilizing circuit is respectively connected with the microprocessor and the oscillator circuit; the heater circuit and a heater circuit sensor are connected with the microprocessor; and the oscillator circuit is connected with the amplification output circuit. According to the temperature compensation technology provided in the invention, on the basis of a constant temperature crystal oscillator, the microprocessor is utilized to control a constant temperature of the crystal oscillator; and the constant temperature is changed according to the external environment temperature without influencing an oscillation circuit.
Description
Technical field
The present invention relates to a kind of technique for temperature compensation of constant-temperature crystal oscillator, be specifically related to a kind of temperature compensation means of constant temperature crystal oscillating circuit.
Background technology
The normal method that adopts of the technique for temperature compensation of crystal oscillator is to utilize temperature sensor to change the voltage of diode; Accomplish change to crystal load; Reach the purpose that changes frequency-temperature characteristic with it, the shortcoming of this method is that the temperature-compensating process can exert an influence to oscillation circuit.
Summary of the invention
The temperature compensation means that the purpose of this invention is to provide a kind of constant temperature crystal oscillating circuit; Utilize microprocessor to detect the thermostat temperature of control environment temperature and crystal; Thermostat temperature adjustment through to crystal changes frequency-temperature characteristic, and compensation process is not adjusted oscillation circuit.
To achieve these goals, the present invention adopts following technical scheme:
A kind of temperature compensation means of constant temperature crystal oscillating circuit; Wherein, Comprise microprocessor, voltage stabilizing circuit, pierce circuit, heater circuit and amplification output circuit, the thermostat temperature transducer is connected with said microprocessor respectively with environment temperature sensor, and voltage stabilizing circuit is connected with pierce circuit with microprocessor respectively; Heater circuit and heater circuit transducer all connect microprocessor, and pierce circuit connects amplification output circuit.
Further, said environment temperature sensor is built in the microprocessor.
Further, microprocessor control circuit adopts a multi-functional digital-to-analogue that has built-in operational amplifier, PWM function and A/D converter to mix microprocessor.
Further, said pierce circuit is made up of the highly stable crystal oscillating circuit, comprises vibration, amplification, output three partial circuits.
Further, heater circuit is made up of electric heater and temperature sensor.
Further, voltage stabilizing circuit adopts two groups of pressurizers, gives the power supply of digital circuit and analog circuit respectively.
Beneficial effect of the present invention is:
Temperature-compensation circuit of the present invention adopts microprocessor control and changes the method for thermostat temperature according to real time temperature, reaches the effect that changes frequency-temperature characteristic.Temperature-controlled precision can be very high, on the basis of constant temperature, through temperature adjustment compensation, has that the temperature-compensating precision is high, compensation process is to characteristics such as the oscillation circuit of oscillator impact.
The present invention is when the PCB structural design; Be arranged on the flat-temperature zone to temperature sensor; The thermostat temperature of sensing crystal; With monitoring external environment temperature, microprocessor is controlled the constant temperature problem of crystal according to the sensing temperature difference of these two temperature sensors, changes, improves frequency-temperature characteristic with the built-in residing ambient temperature of temperature sensor senses microprocessor of microprocessor.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1; The present invention includes microprocessor, voltage stabilizing circuit, pierce circuit, heater circuit and amplification output circuit; Flat-temperature zone temperature sensor three is connected with said microprocessor respectively with environment temperature sensor two, and environment temperature sensor two is built in the microprocessor; Voltage stabilizing circuit is connected with pierce circuit with microprocessor respectively, and heater circuit and temperature sensor one all connect microprocessor, and pierce circuit connects amplification output circuit.
As shown in Figure 2, microprocessor control circuit adopts a multi-functional digital-to-analogue that has built-in operational amplifier, PWM function and A/D converter to mix microprocessor.Pierce circuit is made up of the highly stable crystal oscillating circuit, comprises vibration, amplification, output three partial circuits.Heater circuit is made up of electric heater and temperature sensor one.Voltage stabilizing circuit adopts two groups of pressurizers, gives the power supply of digital circuit and analog circuit respectively.Voltage-controlled end is used for adjusting the frequency of crystal oscillator.
The thermostat temperature of ambient temperature of the present invention and crystal offers microprocessor through corresponding transducer respectively; Adjust state of a control by microprocessor according to state of temperature; The thermostat temperature that changes constant-temperature crystal oscillator through microprocessor improves the frequency-temperature characteristic of oscillator; And change thermostat temperature, and do not influence oscillation circuit according to ambient temperature.
The present invention has following characteristics; The present invention controls the thermostat temperature of constant-temperature crystal oscillator with microprocessor, and according to ambient temperature tracking, adjustment thermostat temperature, reaches the purpose of change (raising) oscillator temperature index; Be thermostat temperature, rather than the load of adjustment crystal reach frequency compensated purpose through the adjustment crystal; It is the temperature constant state of adjusting, control constant-temperature circuit by microprocessor according to the state of ambient temperature.
Explanation is at last; Type of device that adopts in the above theory diagram and function are only unrestricted in order to technical scheme of the present invention to be described; Other modifications that those of ordinary skills make technical scheme of the present invention perhaps are equal to replacement; Only otherwise break away from the spirit and the scope of technical scheme of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (6)
1. the temperature compensation means of a constant temperature crystal oscillating circuit; It is characterized in that: comprise microprocessor, voltage stabilizing circuit, pierce circuit, heater circuit and amplification output circuit; The thermostat temperature transducer is connected with said microprocessor respectively with environment temperature sensor; Voltage stabilizing circuit is connected with pierce circuit with microprocessor respectively, and heater circuit and heater circuit transducer all connect microprocessor, and pierce circuit connects amplification output circuit.
2. the temperature compensation means of a kind of constant temperature crystal oscillating circuit according to claim 1 is characterized in that: said environment temperature sensor is built in the microprocessor.
3. the temperature compensation means of a kind of constant temperature crystal oscillating circuit according to claim 1 and 2 is characterized in that: microprocessor control circuit adopts a multi-functional digital-to-analogue that has built-in operational amplifier, PWM function and A/D converter to mix microprocessor.
4. the temperature compensation means of a kind of constant temperature crystal oscillating circuit according to claim 3 is characterized in that: said pierce circuit is made up of the highly stable crystal oscillating circuit, comprises vibration, amplification, output three partial circuits.
5. the temperature compensation means of a kind of constant temperature crystal oscillating circuit according to claim 4 is characterized in that: heater circuit is made up of electric heater and temperature sensor.
6. want the temperature compensation means of 5 described a kind of constant temperature crystal oscillating circuits according to right, it is characterized in that: voltage stabilizing circuit adopts two groups of pressurizers, gives the power supply of digital circuit and analog circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104294250A CN102522949A (en) | 2011-12-20 | 2011-12-20 | Temperature compensation apparatus of constant temperature crystal oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104294250A CN102522949A (en) | 2011-12-20 | 2011-12-20 | Temperature compensation apparatus of constant temperature crystal oscillation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102522949A true CN102522949A (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104294250A Pending CN102522949A (en) | 2011-12-20 | 2011-12-20 | Temperature compensation apparatus of constant temperature crystal oscillation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN102522949A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607198A (en) * | 2013-11-27 | 2014-02-26 | 武汉海创电子股份有限公司 | 100MHz high-frequency constant temperature crystal oscillator for spaceflight |
| CN110474607A (en) * | 2019-08-08 | 2019-11-19 | 武汉海创电子股份有限公司 | Can space application offset-type quartz oscillator and compensation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000024128A1 (en) * | 1998-10-21 | 2000-04-27 | Symmetricom, Inc. | Thermo-electric cooled oven controlled crystal oscillator |
| CN101860322A (en) * | 2010-05-10 | 2010-10-13 | 广东大普通信技术有限公司 | Automatic temperature controlled crystal oscillator |
| CN101997483A (en) * | 2010-10-18 | 2011-03-30 | 中兴通讯股份有限公司 | Method and device for controlling oven-controlled crystal oscillator by microcomputer |
| CN102064763A (en) * | 2010-12-08 | 2011-05-18 | 郑州原创电子科技有限公司 | Voltage-controlled constant-temperature crystal oscillating circuit |
| CN202435342U (en) * | 2011-12-20 | 2012-09-12 | 郑州原创电子科技有限公司 | Temperature compensation device of constant-temperature crystal oscillation circuit |
-
2011
- 2011-12-20 CN CN2011104294250A patent/CN102522949A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000024128A1 (en) * | 1998-10-21 | 2000-04-27 | Symmetricom, Inc. | Thermo-electric cooled oven controlled crystal oscillator |
| CN101860322A (en) * | 2010-05-10 | 2010-10-13 | 广东大普通信技术有限公司 | Automatic temperature controlled crystal oscillator |
| CN101997483A (en) * | 2010-10-18 | 2011-03-30 | 中兴通讯股份有限公司 | Method and device for controlling oven-controlled crystal oscillator by microcomputer |
| CN102064763A (en) * | 2010-12-08 | 2011-05-18 | 郑州原创电子科技有限公司 | Voltage-controlled constant-temperature crystal oscillating circuit |
| CN202435342U (en) * | 2011-12-20 | 2012-09-12 | 郑州原创电子科技有限公司 | Temperature compensation device of constant-temperature crystal oscillation circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607198A (en) * | 2013-11-27 | 2014-02-26 | 武汉海创电子股份有限公司 | 100MHz high-frequency constant temperature crystal oscillator for spaceflight |
| CN103607198B (en) * | 2013-11-27 | 2017-02-15 | 武汉海创电子股份有限公司 | 100MHz high-frequency constant temperature crystal oscillator for spaceflight |
| CN110474607A (en) * | 2019-08-08 | 2019-11-19 | 武汉海创电子股份有限公司 | Can space application offset-type quartz oscillator and compensation method |
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Application publication date: 20120627 |