CN202435342U - Temperature compensation device of constant-temperature crystal oscillation circuit - Google Patents
Temperature compensation device of constant-temperature crystal oscillation circuit Download PDFInfo
- Publication number
- CN202435342U CN202435342U CN2011205364519U CN201120536451U CN202435342U CN 202435342 U CN202435342 U CN 202435342U CN 2011205364519 U CN2011205364519 U CN 2011205364519U CN 201120536451 U CN201120536451 U CN 201120536451U CN 202435342 U CN202435342 U CN 202435342U
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- microprocessor
- constant
- crystal oscillating
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Abstract
The utility model discloses a temperature compensation device of a constant-temperature crystal oscillation circuit, which comprises a microprocessor, a voltage stabilizing circuit, an oscillator circuit, a heating circuit and an amplifying output circuit. A constant-temperature temperature sensor and an environment temperature sensor are respectively connected with the microprocessor; the voltage stabilizing circuit is respectively connected with the microprocessor and the oscillator circuit; a heating circuit and a heating circuit sensor are both connected with the microprocessor; and the oscillator circuit is connected with the amplifying output circuit. The temperature compensation technology is that based on the constant-temperature crystal oscillation circuit, the constant temperature of a crystal oscillator is controlled by the microprocessor and is changed according to the external environment temperature without influencing an oscillation return circuit.
Description
Technical field
The utility model relates to a kind of technique for temperature compensation of constant-temperature crystal oscillator, is 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.
The utility model content
The purpose of the utility model provides a kind of temperature compensation means 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 utility model 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.
The beneficial effect of the utility model is:
The temperature-compensation circuit of the utility model 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 utility model 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 the theory diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1; The utility model comprises microprocessor, voltage stabilizing circuit, pierce circuit, heater circuit and amplification output circuit; The temperature sensor three of flat-temperature zone 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 heater circuit transducer 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.Voltage stabilizing circuit adopts two groups of pressurizers, gives the power supply of digital circuit and analog circuit respectively.
The ambient temperature of the utility model and the thermostat temperature of crystal offer 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 utlity model has following characteristics; The utility model is controlled 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 the technical scheme of explanation the utility model; Other modifications that those of ordinary skills make the technical scheme of the utility model perhaps are equal to replacement; Only otherwise break away from the spirit and the scope of the utility model technical scheme, all should be encompassed in the middle of the claim scope of the utility model.
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 |
|---|---|---|---|
| CN2011205364519U CN202435342U (en) | 2011-12-20 | 2011-12-20 | Temperature compensation device of constant-temperature crystal oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205364519U CN202435342U (en) | 2011-12-20 | 2011-12-20 | Temperature compensation device of constant-temperature crystal oscillation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202435342U true CN202435342U (en) | 2012-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205364519U Expired - Fee Related CN202435342U (en) | 2011-12-20 | 2011-12-20 | Temperature compensation device of constant-temperature crystal oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202435342U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522949A (en) * | 2011-12-20 | 2012-06-27 | 郑州原创电子科技有限公司 | Temperature compensation apparatus of constant temperature crystal oscillation circuit |
| CN102916653A (en) * | 2012-10-15 | 2013-02-06 | 广东大普通信技术有限公司 | Low-temperature drift clock control device |
| CN110719084A (en) * | 2019-12-12 | 2020-01-21 | 成都正扬博创电子技术有限公司 | Implementation method and device for expanding low-temperature range of temperature compensation crystal oscillator |
-
2011
- 2011-12-20 CN CN2011205364519U patent/CN202435342U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522949A (en) * | 2011-12-20 | 2012-06-27 | 郑州原创电子科技有限公司 | Temperature compensation apparatus of constant temperature crystal oscillation circuit |
| CN102916653A (en) * | 2012-10-15 | 2013-02-06 | 广东大普通信技术有限公司 | Low-temperature drift clock control device |
| CN110719084A (en) * | 2019-12-12 | 2020-01-21 | 成都正扬博创电子技术有限公司 | Implementation method and device for expanding low-temperature range of temperature compensation crystal oscillator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20131220 |