CN201113922Y - High temperature high stability quartz crystal clock oscillator - Google Patents
High temperature high stability quartz crystal clock oscillator Download PDFInfo
- Publication number
- CN201113922Y CN201113922Y CNU2007200861877U CN200720086187U CN201113922Y CN 201113922 Y CN201113922 Y CN 201113922Y CN U2007200861877 U CNU2007200861877 U CN U2007200861877U CN 200720086187 U CN200720086187 U CN 200720086187U CN 201113922 Y CN201113922 Y CN 201113922Y
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- China
- Prior art keywords
- clock oscillator
- quartz crystal
- quartz
- circuit
- oscillating circuit
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Abstract
The utility model provides a quartz crystal clock oscillator with wide temperature range and high stability; the utility model comprises a quartz crystal resonator(1), an oscillating circuit(2) and a compensation circuit(3), wherein the quartz crystal resonator(1) has one end connected with the oscillating circuit(2) by the compensation circuit(3) and the other end directly connected with the oscillating circuit(2), and the oscillating circuit(2) is a ceramic seal CMOS integrated circuit. The utility model overcomes defects existing in a prior clock oscillator of poor temperature characteristics in the wide temperature range. The quartz crystal clock oscillator of the utility model has the advantages of small volume, wide range of working temperature, good temperature characteristic and high production reliability, etc.
Description
Technical field
The utility model relates to a kind of wide temperature high-stability quartz crystal clock oscillator.This quartz oscillator is applied in the avionics equipment.
Background technology
Present quartz crystal clock oscillator use in the communications field very extensively, but since the temperature characterisitic of clock crystal mainly by the temperature characterisitic decision of used quartz-crystal resonator or quartz wafer, so in wide temperature range, its temperature characterisitic is poor.In addition, the vibration IC that present domestic quartz crystal clock oscillator is selected for use mostly is imported material (the general work temperature range is-40 ℃～80 ℃), and the vibration IC that wide temperature range (as: 55 ℃～125 ℃) uses is abroad to domestic embargo, therefore cause the present domestic quartz crystal clock oscillator that can be applied to wide temperature range in short supply, every performance of product does not reach the avionics equipment requirement.
Summary of the invention
The purpose of this utility model is to overcome the weak point of above-mentioned technology, and a kind of wide temperature high-stability quartz crystal clock oscillator is provided, and this oscillator operating temperature range is wide, good temp characteristic, and reliability height.
To achieve these goals, the utility model is by the following technical solutions: wide temperature high-stability quartz crystal clock oscillator, it comprises quartz-crystal resonator 1, oscillating circuit 2, it is characterized in that it also comprises compensating circuit 3, one end of described quartz-crystal resonator 1 is connected with oscillating circuit 2 by compensating circuit 3, the other end directly is connected with oscillating circuit 2, and described oscillating circuit 2 is a ceramic seal CMOS integrated circuit.
In technique scheme, described quartz crystal harmonic swing device 1 is a SMD5032 type resonator.
In technique scheme, described compensating circuit 3 is in series by capacitor C and thermistor RT.
In technique scheme, the quartz wafer in the described SMD5032 type resonator is that AT cuts quartz wafer.
The wide temperature high-stability quartz of the utility model crystal clock oscillator has following advantage: 1.. and oscillating circuit is a ceramic seal CMOS integrated circuit, and the quartz crystal harmonic swing device is a SMD5032 type resonator, so volume is little; 2.. adopt ceramic seal CMOS integrated circuit, make product operating temperature range wide (55 ℃～125 ℃); 3.. owing to adopt compensating circuit, good temp characteristic (in operating temperature range (55 ℃～125 ℃) can reach ± 65ppm); The product reliability height.
Description of drawings
The structured flowchart of the wide temperature high-stability quartz of Fig. 1 the utility model crystal clock oscillator.
The schematic diagram (prior art) of Fig. 2 the utility model oscillating circuit.
The structure chart of Fig. 3 the utility model compensating circuit.
Fig. 4 is crystal resonator frequency-temperature characteristic figure.
Embodiment
Below in conjunction with the performance of the wide temperature high-stability quartz of accompanying drawing detailed description the utility model crystal clock oscillator, but they do not constitute qualification of the present utility model.Simultaneously by illustrating that advantage of the present utility model will become clear more and understanding easily.
Consult accompanying drawing as can be known: the wide temperature high-stability quartz of the utility model crystal clock oscillator, it comprises quartz-crystal resonator 1, oscillating circuit 2, compensating circuit 3, one end of described quartz (controlled) oscillator 1 is connected with oscillating circuit 2 (as shown in Figure 2) by compensating circuit 3, the other end directly is connected with oscillating circuit 2, and described oscillating circuit 2 is a ceramic seal CMOS integrated circuit (as Fig. 1).Quartz-crystal resonator 1 is a SMD5032 type resonator, and compensating circuit 3 is in series (as shown in Figure 3) by capacitor C and thermistor RT.Quartz wafer in the SMD5032 type resonator is that AT cuts quartz wafer.
With SMD5032 type crystal resonator is oscillator, its resistance to shock height, and, can improve this product aging performance directly with the wafer in this kind crystal replacement common crystals, product reliability and stability are further ensured, and can reduce the volume of product.Be the temperature characterisitic that ensures that clock shakes, the crystal resonator of selecting for use adopts the AT with good frequency-temperature characteristic to cut quartz wafer, and its frequency temperature curve is a cubic curve, and its characteristic equation is:
Δf/f＝a
0(T-T
0)+b
0(T-T
0)
2+c
0(T-T
0)
3……(1)
A in the formula
0, b
0, c
0Be respectively one-level, secondary, three grades of temperatures coefficient, T
0For reference temperature (25 ℃), can satisfy the requirement of the temperature frequency difference of this product.
Be the characteristics of rapid rising at crystal 85 ℃～125 ℃ of its frequencies, designed series capacitance and thermistor compensation circuit the crystal high-temperature section is carried out the frequency-temperature characteristic compensation, reduce frequency variation, make the stability of product be better than designing requirement.Crystal reaches at-55 ℃～125 ℃ characteristic using temperature-frequency ± 65ppm (as shown in Figure 4).
Claims (4)
1. wide temperature high-stability quartz crystal clock oscillator, it comprises quartz-crystal resonator (1), oscillating circuit (2), it is characterized in that it also comprises compensating circuit (3), one end of described quartz-crystal resonator (1) is connected with oscillating circuit (2) by compensating circuit (3), the other end directly is connected with oscillating circuit (2), and described oscillating circuit (2) is a ceramic seal CMOS integrated circuit.
2. wide temperature high-stability quartz crystal clock oscillator according to claim 1 is characterized in that described quartz crystal harmonic swing device (1) is a SMD5032 type resonator.
3. wide temperature high-stability quartz crystal clock oscillator according to claim 1 is characterized in that described compensating circuit (3) is in series by electric capacity (C) and thermistor (RT).
4. wide temperature high-stability quartz crystal clock oscillator according to claim 2 is characterized in that the quartz wafer in the described SMD5032 type resonator is that AT cuts quartz wafer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200861877U CN201113922Y (en) | 2007-07-27 | 2007-07-27 | High temperature high stability quartz crystal clock oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200861877U CN201113922Y (en) | 2007-07-27 | 2007-07-27 | High temperature high stability quartz crystal clock oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201113922Y true CN201113922Y (en) | 2008-09-10 |
Family
ID=39965670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200861877U Expired - Fee Related CN201113922Y (en) | 2007-07-27 | 2007-07-27 | High temperature high stability quartz crystal clock oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201113922Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672407A (en) * | 2018-12-20 | 2019-04-23 | 北京无线电计量测试研究所 | A kind of temperature compensating crystal oscillator |
-
2007
- 2007-07-27 CN CNU2007200861877U patent/CN201113922Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672407A (en) * | 2018-12-20 | 2019-04-23 | 北京无线电计量测试研究所 | A kind of temperature compensating 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: 20080910 Termination date: 20130727 |