CN102025321A - Constant-temperature crystal oscillator - Google Patents
Constant-temperature crystal oscillator Download PDFInfo
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- CN102025321A CN102025321A CN2010106000596A CN201010600059A CN102025321A CN 102025321 A CN102025321 A CN 102025321A CN 2010106000596 A CN2010106000596 A CN 2010106000596A CN 201010600059 A CN201010600059 A CN 201010600059A CN 102025321 A CN102025321 A CN 102025321A
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Abstract
The invention discloses a constant-temperature crystal oscillator, which comprises a constant-temperature groove, an internal circuit board, an external circuit board, a heating element, a refrigerating element and a temperature sensor, wherein the internal circuit board is arranged in the constant-temperature groove and electrically connected with the external circuit board through a pin and comprises a crystal oscillation circuit; the external circuit board comprises a temperature control circuit and a power supply circuit which is electrically connected with the temperature control circuit; the heating element is electrically connected with the temperature control circuit so as to form a heating circuit; the refrigerating element is electrically connected with the temperature control circuit so as to form a refrigerating circuit; when the temperature sensor detects that the external temperature is lower than the temperature of the constant-temperature groove, the heating circuit is driven to work so as to raise the temperature of the constant-temperature groove and keep the temperature of the constant-temperature groove constant; and when the temperature sensor detects that the external temperature is higher than the temperature of the constant-temperature groove, the refrigerating circuit is driven to work so as to lower the temperature of the constant-temperature groove and keep the temperature of the constant-temperature groove constant.
Description
Technical field
The present invention relates to a kind of crystal oscillator, relate in particular to a kind of constant-temperature 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, constant-temperature crystal oscillator and digitlization/several types such as the compensation crystal oscillator of μ p.Wherein, constant-temperature 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.Constant-temperature crystal oscillator 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 crystal oscillator.In the prior art, in order further to reduce influence of temperature variation, to improve the frequency stability of constant-temperature crystal oscillator, constant-temperature 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 the assurance constant-temperature crystal oscillator is set of thermostat, but constant-temperature crystal oscillator of the prior art has following problem: in order to guarantee the constant-temperature crystal oscillator steady operation, usually need to be set to the temperature of thermostat higher more than 5 ℃ than maximum operating temperature, if the maximum operating temperature of constant-temperature crystal oscillator is 85 ℃, its thermostat temperature will be more than 90 ℃ so, its ageing rate will worsen, and long-term work is in the condition of high temperature, and its reliability also can variation.
Therefore, being necessary to provide a kind of can work in higher temperature environment and ageing rate constant-temperature crystal oscillator good, that reliability is high overcomes above-mentioned defective.
Summary of the invention
The object of the present invention is to provide the constant-temperature crystal oscillator that a kind of high stability and ageing rate are good, reliability is high.
For achieving the above object, the invention provides a kind of constant-temperature crystal oscillator, comprise thermostat, internal circuit board, the external circuit board, heating element, cooling module and temperature sensor, described internal circuit board is arranged in the described thermostat and by drawing pin and is electrically connected with described the external circuit board, described internal circuit board comprises crystal oscillating circuit, described the external circuit board comprises temperature-adjusting circuit and the power supply circuits that are electrically connected with described temperature-adjusting circuit, described heating element is electrically connected with described temperature-adjusting circuit and forms heater circuit, described cooling module is electrically connected with described temperature-adjusting circuit and forms refrigeration circuit, when described temperature sensor detects extraneous temperature and is lower than the temperature ambient temperature of described thermostat, drive described heater circuit work so that described thermostat is heated up, make described thermostat temperature constant; When described temperature sensor detects ambient temperature and is higher than the temperature of described thermostat, drive described refrigeration circuit work so that described thermostat is lowered the temperature, make described thermostat temperature constant.
Preferably, described heating element and described cooling module are alternately distributed and are fixedly connected on the sidewall outer surface of described thermostat.
Preferably, the bottom of described thermostat and the junction of the sidewall formation depressed part that caves inward, described heating element and described cooling module are alternately distributed and are fixedly connected on described depressed part.
Preferably, described the external circuit board offers groove, and described thermostat is installed in the described groove.
Preferably, described crystal oscillating circuit is made up of quartz crystal and oscillating element.
Preferably, described heating element is a heating tube, and described cooling module is the semiconductor refrigerating element.
Compared with prior art, constant-temperature crystal oscillator of the present invention adopts heating element to be electrically connected with temperature-adjusting circuit and forms heater circuit and employing cooling module and be electrically connected with described temperature-adjusting circuit and form refrigeration circuit, when temperature sensor detects extraneous temperature and is lower than the temperature ambient temperature of described thermostat, drive described heater circuit work so that described thermostat is heated up, make described thermostat temperature constant; When temperature sensor detects ambient temperature and is higher than the temperature of described thermostat, drive described refrigeration circuit work so that described thermostat is lowered the temperature, make described thermostat temperature constant.Like this, combine the heater circuit and the refrigeration circuit of automatic intensification and cooling, make the temperature equalization in the thermostat, reduce the thermostat temperature and be subjected to the external influence degree.Constant-temperature crystal oscillator high stability of the present invention and ageing rate are good, reliability is high.
By following description also in conjunction with the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used to explain embodiments of the invention.
Description of drawings
Fig. 1 is the structured flowchart of constant-temperature crystal oscillator of the present invention.
Fig. 2 is the structural representation of first embodiment of constant-temperature crystal oscillator of the present invention.
Fig. 3 is the exploded view of constant-temperature crystal oscillator shown in Figure 2.
Fig. 4 is the structural representation of second embodiment of constant-temperature crystal oscillator of the present invention.
Fig. 5 is the structured flowchart of the 3rd embodiment of constant-temperature crystal oscillator of the present invention.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the invention provides the constant-temperature crystal oscillator that a kind of high stability and ageing rate are good, reliability is high.
Fig. 1 is the structured flowchart of constant-temperature crystal oscillator of the present invention.As shown in Figure 1, constant-temperature crystal oscillator of the present invention comprises thermostat 11, internal circuit board 12, the external circuit board 13, heating element 14a, cooling module 14b and temperature sensor 15, described internal circuit board 12 is arranged in the described thermostat 11 and by drawing pin (figure does not show) and is electrically connected with described the external circuit board 13, described internal circuit board 12 comprises crystal oscillating circuit 120, described the external circuit board 13 comprises temperature-adjusting circuit 131 and the power supply circuits 132 that are electrically connected with described temperature-adjusting circuit 131, described heating element 14a is electrically connected with described temperature-adjusting circuit 131 and forms heater circuit, described cooling module 14b is electrically connected with described temperature-adjusting circuit 131 and forms refrigeration circuit, when described temperature sensor 15 detects extraneous temperature and is lower than the temperature ambient temperature of described thermostat 11, detected result is sent to described temperature-adjusting circuit 131, described temperature-adjusting circuit 131 and then drive described heating element 14a work so that described thermostat 11 is heated up makes described thermostat temperature constant; When described temperature sensor 15 detects ambient temperature and is higher than the temperature of described thermostat 11, detected result is sent to described temperature-adjusting circuit 131, described temperature-adjusting circuit 131 and then drive described cooling module 14b work so that described thermostat 11 is lowered the temperature makes described thermostat temperature constant.
Specifically describe the structure of constant-temperature crystal oscillator of the present invention below.Figure 2 shows that the structural representation of first embodiment of constant-temperature crystal oscillator of the present invention.With reference to figure 2～3, constant-temperature crystal oscillator 1 comprises thermostat 11, internal circuit board 12, the external circuit board 13, heating element 14a, cooling module 14b and temperature sensor 15, described internal circuit board 12 comprises the crystal oscillating circuit of being made up of quartz crystal 121 and oscillating element 122, and described internal circuit board 12 is fixedly mounted in the described thermostat 11.The power supply circuits (with reference to figure 1) that described the external circuit board 13 comprises temperature-adjusting circuit (with reference to figure 1) and is electrically connected with described temperature-adjusting circuit, described heating element 14a, cooling module 14b and described temperature sensor 15 all electrically connect with described the external circuit board 13.
Described the external circuit board 13 can be fixedly connected on the bottom of described thermostat 11, and electrically connects with internal circuit board 12.Preferably, described the external circuit board 13 also can offer groove (figure does not show), and described groove runs through described the external circuit board 13, and described thermostat 11 is installed in the described groove.In the present embodiment, described thermostat 11 passes described groove 131, and fixedlys connected with described the external circuit board 13; At length, the sidewall outer surface 1111 of described thermostat 11 is bonded on the side wall inner surfaces of described the external circuit board 13 by binding agent.
Described constant-temperature crystal oscillator 1 also comprises and draws pin 121, and the described pin 121 that draws is conductor, and a described end that draws pin 121 is electrically connected with described internal circuit board 12, and is fixed in the side of described internal circuit board 12; The described other end that draws pin 121 passes from the sidewall 111 of described thermostat 11, and the described pin 121 that draws extends to the external circuit board 13 with the direction parallel with described the external circuit board 13, and described the external circuit board 13 is electrically connected with described internal circuit board 12 by the described pin 121 that draws.Constant-temperature crystal oscillator 1 of the present invention is provided with by the groove 131 that thermostat 11 is passed the external circuit board 13, thereby has reduced the whole height of constant-temperature crystal oscillator 1, has alleviated the weight of constant-temperature crystal oscillator 1; And, the mode that goes out pin by internal circuit board 12 sides with internal circuit board 12 is electrically connected with the external circuit board 13, improved the electrical connection properties of constant-temperature crystal oscillator 1, thereby improved the stability of constant-temperature crystal oscillator 1 output frequency.
Preferably, the bottom surface 114 of described thermostat 11 and the junction of sidewall 111 cave inward and form depressed part 115, described depressed part 115 is positioned at described thermostat bottom 113, in the present embodiment, the bottom 114 of described thermostat 11 is quadrangle, described depressed part 115 is four, lays respectively at four angles of described thermostat bottom 113.Described heating element 14a is a heating tube, and described heating element 14a is two, is arranged in two described depressed parts 115 with diagonal manner respectively; Described cooling module 14b is the semiconductor refrigerating element, and described cooling module 14b also is two, is arranged in two described depressed parts 115 in addition with diagonal manner respectively.Be that described heating element 14a and described cooling module 14b are alternately distributed and are fixedly connected in the described depressed part 115.At length, described heating element 14a and described cooling module 14b are installed in the described depressed part 115 by welding manner.Described heating element 14a and described cooling module 14b all electrically connect with described the external circuit board 13.The setting of arranging of described heating element 14a and described cooling module 14b makes the heating or the refrigeration of described thermostat 11 more even, improve thermostat 11 temperature inside gradients effectively, and then the stability of raising constant-temperature crystal oscillator 1 output frequency, the operating efficiency of raising constant-temperature crystal oscillator 1.
Particularly, as shown in Figure 1, described temperature sensor 15 is fixedly connected on described thermostat bottom 113.Described temperature sensor 15 is electrically connected with temperature-adjusting circuit in the external circuit board 13, the temperature of 15 pairs of thermostats 11 of described temperature sensor detects and feeds back, described temperature sensor 15 is by described temperature-adjusting circuit, heating element 14a on the control thermostat 11 or cooling module 14b are to the heating or the refrigeration degree of thermostat 11, keep the temperature equalization in the thermostat 11, reduce the influence of ambient temperature described thermostat 11.
Need to prove, the number of the heating element 14a of constant-temperature crystal oscillator and cooling module 14b is not limited to above-mentioned two in the foregoing description, look concrete condition and design, the groove in the foregoing description is done corresponding adjustment design according to the number of heating element 14a and cooling module 14b.
Figure 4 shows that the structural representation of second embodiment of constant-temperature crystal oscillator of the present invention.With reference to figure 4, constant-temperature crystal oscillator 2 comprises thermostat 21, internal circuit board (figure does not show), the external circuit board 23, heating element 24a, cooling module 24b and temperature sensor (figure does not show), heating element 24a, cooling module 24b and temperature sensor all are electrically connected with described the external circuit board 23, and described internal circuit board is fixedly mounted in the described thermostat 21.Described internal circuit board draws pin 221 by what pass thermostat 21, is electrically connected with described the external circuit board 23.Different with first embodiment of the invention constant-temperature crystal oscillator 1 is: the bottom of described constant-temperature crystal oscillator 2 also is provided with depressed part 115 with fixedly connected described heating element 24a, cooling module 24b6, and heating element 24a, cooling module 24b are alternately distributed and the sidewall outer surface 2111 of fixedly connected thermostat 21.At length, described heating element 24a and cooling module 24b are alternately distributed and are fixedly connected on the sidewall outer surface 2111 of thermostat 21 by the mode of welding.
Figure 5 shows that the structural representation of the 3rd embodiment of constant-temperature crystal oscillator of the present invention.With reference to figure 5, constant-temperature crystal oscillator, 3 comprise thermostat, internal circuit board 32, the external circuit board 33, heating element 34a, cooling module 34b and temperature sensor 35, heating element 34a, cooling module 34b and temperature sensor all are electrically connected with described the external circuit board 33, described internal circuit board 32 comprises crystal oscillating circuit 320, described the external circuit board 33 comprises temperature-adjusting circuit 331 and the power supply circuits 332 that are electrically connected with described temperature-adjusting circuit 331, and described internal circuit board is fixedly mounted in the described thermostat 31.Described internal circuit board draws pin (figure do not show) by what pass thermostat 21, is electrically connected with described the external circuit board 33.Different with first embodiment of the invention constant-temperature crystal oscillator 1 is: thermostat 31a and outer thermostat 31b in the thermostat of described constant-temperature crystal oscillator 3 comprises, described heating element 34a places described interior thermostat 31a, described cooling module 34b places described outer thermostat 31b, like this, place described in the heating element 34a of thermostat 31a be electrically connected with described temperature-adjusting circuit 331 and form heater circuit to heat, place the cooling module 34b of described outer thermostat 31b to be electrically connected and form refrigeration circuit to freeze with described temperature-adjusting circuit 331, be double flute circuit control temperature, can more effectively make described thermostat temperature constant.
In above-mentioned all embodiment, be appreciated that ground, the shared semiconductor device of described heating element and cooling module does not influence enforcement of the present invention.
Need to prove that the connected mode of described thermostat and described the external circuit board also is not limited to the use binding agent, also can use modes such as welding or buckle to connect thermostat and the external circuit board.
Above invention has been described in conjunction with most preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain various modification, equivalent combinations of carrying out according to essence of the present invention.
Claims (8)
1. constant-temperature crystal oscillator, it is characterized in that comprising thermostat, internal circuit board, the external circuit board, heating element, cooling module and temperature sensor, described internal circuit board is arranged in the described thermostat and by drawing pin and is electrically connected with described the external circuit board, described internal circuit board comprises crystal oscillating circuit, described the external circuit board comprises temperature-adjusting circuit and the power supply circuits that are electrically connected with described temperature-adjusting circuit, described heating element is electrically connected with described temperature-adjusting circuit and forms heater circuit, described cooling module is electrically connected with described temperature-adjusting circuit and forms refrigeration circuit, when described temperature sensor detects extraneous temperature and is lower than the temperature ambient temperature of described thermostat, drive described heater circuit work so that described thermostat is heated up, make described thermostat temperature constant; When described temperature sensor detects ambient temperature and is higher than the temperature of described thermostat, drive described refrigeration circuit work so that described thermostat is lowered the temperature, make described thermostat temperature constant.
2. constant-temperature crystal oscillator as claimed in claim 1 is characterized in that, described heating element and described cooling module are alternately distributed and are fixedly connected on the sidewall outer surface of described thermostat.
3. constant-temperature crystal oscillator as claimed in claim 1 is characterized in that, the bottom of described thermostat and the junction of the sidewall formation depressed part that caves inward, and described heating element and described cooling module are alternately distributed and are fixedly connected on described depressed part.
4. constant-temperature crystal oscillator as claimed in claim 1 is characterized in that described the external circuit board offers groove, and described thermostat is installed in the described groove.
5. constant-temperature crystal oscillator as claimed in claim 1 is characterized in that described crystal oscillating circuit is made up of quartz crystal and oscillating element.
6. constant-temperature crystal oscillator as claimed in claim 1 is characterized in that, described heating element is a heating tube, and described cooling module is the semiconductor refrigerating element.
7. constant-temperature crystal oscillator as claimed in claim 1 is characterized in that, the shared semiconductor device of described heating element and cooling module.
8. constant-temperature crystal oscillator as claimed in claim 1 is characterized in that, thermostat and outer thermostat in described thermostat comprises, described heating element place described interior thermostat, and described cooling module places described outer thermostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106000596A CN102025321A (en) | 2010-12-22 | 2010-12-22 | Constant-temperature crystal oscillator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106000596A CN102025321A (en) | 2010-12-22 | 2010-12-22 | Constant-temperature crystal oscillator |
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| CN102025321A true CN102025321A (en) | 2011-04-20 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801386A (en) * | 2012-08-22 | 2012-11-28 | 东莞市金振电子有限公司 | System used for enhancing heat stability of constant-temperature crystal oscillator |
| CN102902288A (en) * | 2012-09-26 | 2013-01-30 | 广东大普通信技术有限公司 | Constant temperature control crystal oscillator and constant temperature bath temperature control method thereof |
| 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 |
| CN107670564A (en) * | 2017-11-01 | 2018-02-09 | 无锡奇天生物科学仪器有限公司 | A kind of constant temperature oscillation blending instrument |
| CN107819464A (en) * | 2016-09-13 | 2018-03-20 | 北京同方微电子有限公司 | A kind of mixed type constant temperature compensation crystal oscillator |
| CN107819463A (en) * | 2016-09-13 | 2018-03-20 | 北京同方微电子有限公司 | A kind of constant-temperature crystal oscillator based on semiconductor chilling plate |
| CN113125023A (en) * | 2021-03-05 | 2021-07-16 | 深圳市福浪电子有限公司 | Detection device for detecting temperature of crystal oscillator |
| CN114035024A (en) * | 2021-10-26 | 2022-02-11 | 深圳市兴威帆电子技术有限公司 | System and method for testing real-time clock chip |
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| CN201674463U (en) * | 2010-06-13 | 2010-12-15 | 唐山晶源裕丰电子股份有限公司 | Low power consumption vacuum packaging precise constant-temperature compensated crystal oscillator |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801386A (en) * | 2012-08-22 | 2012-11-28 | 东莞市金振电子有限公司 | System used for enhancing heat stability of constant-temperature crystal oscillator |
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| CN102902288A (en) * | 2012-09-26 | 2013-01-30 | 广东大普通信技术有限公司 | Constant temperature control crystal oscillator and constant temperature bath temperature control method thereof |
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| 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 |
| CN107819464A (en) * | 2016-09-13 | 2018-03-20 | 北京同方微电子有限公司 | A kind of mixed type constant temperature compensation crystal oscillator |
| CN107819463A (en) * | 2016-09-13 | 2018-03-20 | 北京同方微电子有限公司 | A kind of constant-temperature crystal oscillator based on semiconductor chilling plate |
| CN107819464B (en) * | 2016-09-13 | 2024-02-02 | 紫光同芯微电子有限公司 | Mixed constant temperature-temperature compensation crystal oscillator |
| CN107670564A (en) * | 2017-11-01 | 2018-02-09 | 无锡奇天生物科学仪器有限公司 | A kind of constant temperature oscillation blending instrument |
| CN113125023A (en) * | 2021-03-05 | 2021-07-16 | 深圳市福浪电子有限公司 | Detection device for detecting temperature of crystal oscillator |
| CN114035024A (en) * | 2021-10-26 | 2022-02-11 | 深圳市兴威帆电子技术有限公司 | System and method for testing real-time clock chip |
| CN114035024B (en) * | 2021-10-26 | 2023-11-14 | 深圳市兴威帆电子技术有限公司 | Real-time clock chip testing system and method |
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Application publication date: 20110420 |