CN201584944U - Crystal oscillator with constant temperature control - Google Patents
Crystal oscillator with constant temperature control Download PDFInfo
- Publication number
- CN201584944U CN201584944U CN2009202727956U CN200920272795U CN201584944U CN 201584944 U CN201584944 U CN 201584944U CN 2009202727956 U CN2009202727956 U CN 2009202727956U CN 200920272795 U CN200920272795 U CN 200920272795U CN 201584944 U CN201584944 U CN 201584944U
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- crystal oscillator
- circuit
- oscillator
- thermostatic control
- heater
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Abstract
The utility model discloses a crystal oscillator with constant temperature control, which comprises a crystal oscillation circuit, a temperature control circuit and a heating circuit, wherein the heating circuit is electrically connected with the crystal oscillation circuit and the temperature control circuit; the crystal oscillation circuit comprises a crystal oscillator and a heating device, and the crystal oscillator comprises an oscillator casing, a base, a pin, a crystal plate and a penetration piece; the crystal plate is arranged in a cavity formed by the oscillator casing and the base; the pin is connected with the crystal plate and passes through the base from the cavity; a through hole communicated with the cavity is formed on the oscillator casing; the penetration piece is mounted in the through hole in a sealing manner; and the heating device generates electromagnetic wave which passes through the penetration piece and irradiates on the crystal plate. The crystal oscillator with constant temperature control has the characteristics of low power consumption and rapidly turning to the stable state.
Description
Technical field
The utility model relates to a kind of crystal oscillator, relates in particular to a kind of thermostatic control crystal oscillator.
Background technology
The application of quartz oscillator has the history of decades, because of it has high these characteristics of frequency stability, so occupy an important position in electronic technology field always.Especially the high speed development of IT industry more makes this crystal oscillator shine vitality.Quartz oscillator is in telecommunication, satellite communication, mobile telephone system, global positioning system, navigation, remote control, Aero-Space, high-speed computer, accurate measuring instrument and consumer consumer electronic product, as standard frequency source or pulse signal source, frequency reference is provided, and is that the oscillator of other type at present is irreplaceable.Quartz oscillator divides non-temp. compensation type crystal oscillator, temperature compensating crystal oscillator, voltage controlled crystal oscillator, thermostatic control crystal oscillator and digitlization/several types such as the compensation crystal oscillator of μ p.Wherein, the thermostatic control crystal oscillator is present frequency stability and the highest crystal oscillator of accuracy, it is all very good in the performance of aspects such as ageing rate, temperature stability, long-term stability and short-term stability, so the accurate time frequency signal of Chang Zuowei source is widely used in the electronic instruments such as global positioning system, communication, metering, remote measuring and controlling, frequency spectrum and network analyzer.
Because the oscillating characteristic of quartz crystal changes with variation of temperature, thereby can influence the output frequency of quartz oscillator.Thermostatic control crystal oscillator commonly used is to utilize thermostat to make the temperature of crystal oscillator or quartz-crystal unit keep constant, will change the oscillator output frequency variable quantity that causes by environment temperature and be cut to minimum.In the prior art, in order further to reduce influence of temperature variation, to improve the frequency stability of thermostatic control crystal oscillator, the thermostatic control crystal oscillator generally has internal circuit board and the external circuit board, internal circuit board comprises crystal oscillating circuit, because its service behaviour of the easy temperature influence of crystal oscillating circuit, so internal circuit board is positioned at thermostat, the external circuit board comprises temperature-adjusting circuit and power supply circuits, the external circuit board is fixedly connected on the bottom of thermostat, and electrically connects with internal circuit board.The frequency stability that assurance thermostatic control crystal oscillator is set of thermostat, but thermostatic control crystal oscillator of the prior art has following problem: one, heat to thermostat by the heating tube that is installed on the thermostat, then indirectly heat transferred is given crystal oscillator, such secondary heat is transmitted and is made that not only the efficiency of heating surface is low, and has increased constant-temperature crystal oscillator and enter the time of stable state; Its two, heat to crystal oscillator by thermostat, the utilance of its heat energy is low, needs many times heat energy just can pass to a heat energy of crystal oscillator, has increased the power consumption of thermostatic control crystal oscillator virtually.
Therefore, be necessary that the thermostatic control crystal oscillator that a kind of low-power consumption is provided and enters stable state fast overcomes above-mentioned defective.
The utility model content
The purpose of this utility model is the thermostatic control crystal oscillator that a kind of low-power consumption is provided and enters stable state fast.
To achieve these goals, the utility model provides a kind of thermostatic control crystal oscillator, described thermostatic control crystal oscillator comprises crystal oscillating circuit, temperature-adjusting circuit and heater circuit, described heater circuit is electrically connected described crystal oscillating circuit and described temperature-adjusting circuit, described crystal oscillating circuit comprises crystal oscillator and heater, described crystal oscillator comprises the oscillator housing, base, pin, wafer and penetrate sheet, described wafer is arranged in described oscillator housing and the formed cavity of described base, described pin is connected with described wafer and passes described base from described cavity, described oscillator housing offers the through hole that is communicated with described cavity, the described sheet that penetrates is installed in the described through hole hermetically, described heater generates electromagnetic waves, and described electromagnetic wave passes the described sheet that penetrates and shines on described wafer.
Compared with prior art, the heater in the utility model thermostatic control crystal oscillator penetrates sheet directly to the wafer illumination electromagnetic wave by being installed on the oscillator housing, thereby heats to wafer.Avoided in the prior art thermostatic control crystal oscillator to give the wafer transferring heat by thermostat, both improved efficient to the wafer heating, make the thermostatic control crystal oscillator enter stable operating state apace, export more stable nominal frequency signal, and electromagnetic wave directly heats to wafer, reduce the power consumption of thermostatic control crystal oscillator, thereby reduced the operating cost of this thermostatic control crystal oscillator.
In an embodiment of the present utility model, the input of temperature-adjusting circuit is connected with described crystal oscillating circuit in the described thermostatic control crystal oscillator, and the output of described temperature-adjusting circuit is connected with described heater circuit.Preferably, temperature-adjusting circuit described in the thermostatic control crystal oscillator becomes correspondent voltage with the B mode vibration frequency signal of described crystal oscillating circuit output or fundamental frequency signal or three overtone frequency conversion of signals, and described voltage exports described heater circuit to.Described crystal oscillating circuit is fed back to correspondent frequency with himself operating state and exports temperature-adjusting circuit to, described temperature-adjusting circuit becomes described frequency inverted correspondent voltage to export heater circuit to the control heater circuit again, and described heater circuit carries out real-time control to the heater in the crystal oscillating circuit.In the present embodiment, crystal oscillating circuit, temperature-adjusting circuit and heater circuit form a feedback information ring, and this is arranged so that the utility model constant-temperature crystal oscillator operating state is more stable.
Preferably, heater described in the utility model thermostatic control crystal oscillator is infrared transmitter or microwave emitter.
Preferably, in an embodiment of the present utility model, described in the described thermostatic control crystal oscillator penetrates the top that sheet is arranged at described oscillator housing; In another embodiment of the present utility model, the described through hole in the thermostatic control crystal oscillator is opened in the top or the sidewall of described oscillator housing, and the described sheet that penetrates is installed in the described through hole hermetically.
Preferably, penetrating sheet described in the utility model thermostatic control crystal oscillator is glass or pottery.The electromagnetism wave energy that heater is launched is worn fully to penetrate and is penetrated sheet, improves electromagnetic utilance.
By following description also in conjunction with the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used to explain embodiment of the present utility model.
Description of drawings
Fig. 1 is the structural representation of crystal oscillator among first embodiment of the utility model thermostatic control crystal oscillator.
Fig. 2 is the structural representation of crystal oscillator among second embodiment of the utility model thermostatic control crystal oscillator.
The structured flowchart of first embodiment of Fig. 3 the utility model thermostatic control crystal oscillator.
Fig. 4 is the structured flowchart of crystal oscillating circuit among first embodiment of the utility model thermostatic control crystal oscillator.
The tool present embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the utility model provides a kind of thermostatic control crystal oscillator, and described thermostatic control crystal oscillator has low-power consumption and enters the characteristics of stable state fast.
With reference to figure 1-4, described thermostatic control crystal oscillator 1 comprises crystal oscillating circuit 11, temperature-adjusting circuit 12 and heater circuit 13.Described heater circuit 13 is electrically connected described crystal oscillating circuit 11 and described temperature-adjusting circuit 12, and in addition, described crystal oscillating circuit 11 comprises crystal oscillator 111 and heater 112.At length, crystal oscillator 111 as shown in Figure 1 comprises oscillator housing 1111, base 1112, pin 1113, wafer (figure does not show) and penetrates sheet 1114.Described oscillator housing 1111 is cylindrical shape, described wafer is arranged in described oscillator housing 1111 and the described base 1112 formed cavitys (figure is for showing), one end of described pin 1113 is connected with described wafer, the other end of described pin 1113 passes described base 1112 from described cavity, and is connected electrically in the described crystal oscillating circuit 11.The top 1111a of described oscillator housing offers the through hole (figure does not show) that is communicated with described cavity, the described sheet 1114 that penetrates is installed in the described through hole, and describedly penetrate the planar dimension of sheet 1114 and the planar dimension of through hole is complementary, that is: the described sheet 1114 that penetrates can be installed in the described through hole hermetically by the mode of bonding.In the present embodiment, the described sheet 1114 that penetrates is glass material.Figure 2 shows that the structural representation of crystal oscillator 112 among second embodiment of the utility model thermostatic control crystal oscillator, the structural similarity of the structure of this crystal oscillator 112 and above-mentioned crystal oscillator 111, different with the structure of crystal oscillator 111 is: oscillator housing 1121 is the tetragonal body shape, through hole (figure does not show) is opened on the sidewall 1121a of described crystal oscillator housing, penetrates sheet 1114 and is installed in the described through hole accordingly and hermetically.
With reference to figure 1,3 and Fig. 4, heater circuit described in the thermostatic control crystal oscillator 1 13 is electrically connected described crystal oscillating circuit 11 and described temperature-adjusting circuit 12, particularly, the input of described temperature-adjusting circuit 12 is connected with described crystal oscillating circuit 11, the output of described temperature-adjusting circuit 12 is connected with the input of described heater circuit 13, and the output of described heater circuit 13 is electrically connected with heater 112 in the described crystal oscillating circuit 11.Crystal oscillating circuit 11 is divided into the two-way output frequency signal by two kinds of different selection frequency parameters in the utility model constant-temperature crystal oscillator 1: the nominal frequency signal of first via frequency signal for selecting by C mode vibration frequency with zero temperature coefficient point, and first via frequency signal is the stable output crystal oscillation signal that described constant-temperature crystal oscillator 1 offers product; The second road frequency signal is B mode vibration frequency signal or fundamental frequency signal or three overtone frequency signals, and wherein, described B mode vibration frequency signal is the parasitic frequency signal than the frequency high 9.4% of described C mode vibration frequency signal.The second road frequency signal of described crystal oscillating circuit 11 exports temperature-adjusting circuit 12 to, single-chip microcomputer in the temperature-adjusting circuit 12 is according to described B mode vibration frequency signal, fundamental frequency signal or three overtone frequency signals convert corresponding voltage value to by corresponding algorithm, and export described magnitude of voltage to heater circuit 13 and add heat and corresponding temperature index with what control that described heater circuit 13 generates, then, described heater circuit 13 will generate adds heat and the corresponding temperature index exports heater 112 to, produce the electromagnetic wave of characteristic frequency with control heater 112, described electromagnetic wave passes penetrating sheet 1114 and shining the wafer that is arranged in described crystal oscillator 111 cavitys in the described crystal oscillator 111, particularly, electromagnetic wave irradiation is on the electrode coating of described wafer surface, and produce resonance, thereby realize the heating of electromagnetic wave to wafer with described electrode coating.
Need to prove that in the present embodiment, described heater 112 is an infrared transmitter, in other embodiments, described heater can be other electromagnetic wave launcher such as microwave launcher.Because the described sheet 1114 that penetrates in the present embodiment is the clear glass material, it does not absorb electromagnetic wave, so the electromagnetism wave energy of being sent by heater 112 passes completely through described sheet 1114 irradiate wafer that penetrate, thereby improves electromagnetic utilance.In other embodiments, the described sheet 1114 that penetrates can be pottery, resinae material or does not absorb electromagnetic other material.In addition, the installation site that penetrates sheet in the utility model thermostatic control crystal oscillator is not limited to above-mentioned two kinds of set-up modes, bottom or other specific design on the thermostatic control crystal oscillator that can be arranged on the crystal oscillator housing are decided, and the number and the shape that penetrate sheet are also decided by the specific design of thermostatic control crystal oscillator.
The crystal oscillating circuit 11 of the utility model thermostatic control crystal oscillator 1, temperature-adjusting circuit 12 and heater circuit 13 form a feedback information ring, that is: crystal oscillating circuit 11 exports the B mode vibration frequency signal of its generation or fundamental frequency signal or three overtone frequency signals to temperature-adjusting circuit 12, so that 12 pairs of heater circuits 13 of temperature-adjusting circuit are controlled in real time, thereby the heater 112 that heater circuit 13 is controlled in the crystal oscillating circuit 11 in real time sends electromagnetic wave, and then wafer is heated.Therefore, the utility model thermostatic control crystal oscillator 1 can keep temperature constant state, thereby guarantees the stability of thermostatic control crystal oscillator 1 output frequency, makes that its operating state is more stable.In addition, the heater in the utility model thermostatic control crystal oscillator penetrates sheet directly to the wafer illumination electromagnetic wave by being installed on the oscillator housing, thereby heats to wafer.Avoided in the prior art thermostatic control crystal oscillator to give the wafer transferring heat by thermostat, both improved efficient to the wafer heating, make the thermostatic control crystal oscillator enter stable operating state apace, export more stable nominal frequency signal, and electromagnetic wave directly heats to wafer, reduce the power consumption of thermostatic control crystal oscillator, thereby reduced the operating cost cost of this thermostatic control crystal oscillator.
Abovely the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to essence of the present utility model in conjunction with most preferred embodiment.
Claims (6)
1. thermostatic control crystal oscillator, it is characterized in that: comprise crystal oscillating circuit, temperature-adjusting circuit and heater circuit, described heater circuit is electrically connected described crystal oscillating circuit and described temperature-adjusting circuit, described crystal oscillating circuit comprises crystal oscillator and heater, described crystal oscillator comprises the oscillator housing, base, pin, wafer and penetrate sheet, described wafer is arranged in described oscillator housing and the formed cavity of described base, described pin is connected with described wafer and passes described base from described cavity, described oscillator housing offers the through hole that is communicated with described cavity, the described sheet that penetrates is installed in the described through hole hermetically, described heater generates electromagnetic waves, and described electromagnetic wave passes the described sheet that penetrates and shines on described wafer.
2. thermostatic control crystal oscillator as claimed in claim 1 is characterized in that: the input of described temperature-adjusting circuit is connected with described crystal oscillating circuit, and the output of described temperature-adjusting circuit is connected with described heater circuit.
3. thermostatic control crystal oscillator as claimed in claim 2, it is characterized in that: described temperature-adjusting circuit becomes correspondent voltage with the B mode vibration frequency signal of described crystal oscillating circuit output or fundamental frequency signal or three overtone frequency conversion of signals, described voltage exports described heater circuit to, and described heater circuit is by the heat that adds of the described heater of described voltage control.
4. thermostatic control crystal oscillator as claimed in claim 1 is characterized in that: described heater is infrared transmitter or microwave emitter.
5. thermostatic control crystal oscillator as claimed in claim 1 is characterized in that: described through hole is opened in the top or the sidewall of described oscillator housing, and the described sheet that penetrates is installed in the described through hole hermetically.
6. thermostatic control crystal oscillator as claimed in claim 1 is characterized in that: the described sheet that penetrates is glass or pottery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202727956U CN201584944U (en) | 2009-12-24 | 2009-12-24 | Crystal oscillator with constant temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202727956U CN201584944U (en) | 2009-12-24 | 2009-12-24 | Crystal oscillator with constant temperature control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201584944U true CN201584944U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202727956U Expired - Lifetime CN201584944U (en) | 2009-12-24 | 2009-12-24 | Crystal oscillator with constant temperature control |
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| Country | Link |
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| CN (1) | CN201584944U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098002A (en) * | 2010-12-22 | 2011-06-15 | 广东大普通信技术有限公司 | Omnibearing-displacement self-adaptive crystal oscillation system |
| CN102739156A (en) * | 2012-07-03 | 2012-10-17 | 上海鸿晔电子科技有限公司 | Vacuum-integrated triode-heating type constant temperature crystal oscillator |
-
2009
- 2009-12-24 CN CN2009202727956U patent/CN201584944U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098002A (en) * | 2010-12-22 | 2011-06-15 | 广东大普通信技术有限公司 | Omnibearing-displacement self-adaptive crystal oscillation system |
| CN102098002B (en) * | 2010-12-22 | 2012-10-03 | 广东大普通信技术有限公司 | Omnibearing-displacement self-adaptive crystal oscillation system |
| CN102739156A (en) * | 2012-07-03 | 2012-10-17 | 上海鸿晔电子科技有限公司 | Vacuum-integrated triode-heating type constant temperature crystal oscillator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100915 Effective date of abandoning: 20091224 |