CN103607198B - 100MHz high-frequency constant temperature crystal oscillator for spaceflight - Google Patents
100MHz high-frequency constant temperature crystal oscillator for spaceflight Download PDFInfo
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- CN103607198B CN103607198B CN201310614087.7A CN201310614087A CN103607198B CN 103607198 B CN103607198 B CN 103607198B CN 201310614087 A CN201310614087 A CN 201310614087A CN 103607198 B CN103607198 B CN 103607198B
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Abstract
The invention relates to the field of crystal oscillators, in particular to a 100MHz high-frequency constant temperature crystal oscillator for spaceflight. The 100MHz high-frequency constant temperature crystal oscillator comprises a power source module, a main oscillation module, a temperature control module and an amplifying output module. After the voltage of the power source module is stabilized through a voltage stabilizer, the power source module is used for supplying electricity to the main oscillation module, the temperature control module and the amplifying output module. The temperature control module is used for controlling the environment temperature of the main oscillation module. The output end of the main oscillation module is connected with the input end of the amplifying output module. A constant temperature groove is heated through a customized copper sheet in a heat transmission mode, the size of the constant temperature groove can be reduced, the utilization rate of heat of a high-power heating pipe can be higher, the power consumption of the crystal oscillator is reduced, the crystal can be heated more evenly, and the frequency-temperature stability index is improved.
Description
Technical field
The present invention relates to crystal oscillator field, more particularly to a kind of space flight 100MHz altofrequency constant temperature crystal vibration
Device.
Background technology
Crystal, crystal triode and varactor of using inside crystal oscillator etc. broadly fall into temperature sensitive unit device
Part.In crystal oscillator, the control temperature of constant temperature system and the inflection temperature of crystal is made to match（Crystal is attached in inflection temperature
Nearly work, its frequency-temperature coefficient is minimum）, so that crystal is operated in a constant inflection temperature environment, crystal oscillator works
The most stable.The feature of constant-temperature crystal oscillator is when ambient temperature changes, the internal temperature control of constant-temperature crystal oscillator
Circuit is operated, and makes the temperature change of the internal temperature chamber of crystal oscillator minimum, thus ensureing the electrical property of crystal oscillator
Index is affected minimum by ambient temperature.
Space flight constant-temperature crystal oscillator disables process stipulation, and lead components and parts are unable to pasting board and install, and lead root is to weldering
Junction need to be in 0.75mm_ 3.5mm, and the crystal resonator using inside constant-temperature crystal oscillator, crystal triode and transfiguration
It is all lead components and parts that diode etc. broadly falls into temperature sensitive components, wherein crystal resonator and crystal triode again, if
Both key componentses not install by pasting board, and the heat of high-power heating pipe quickly, uniformly can not pass to them, and crystal shakes
The power consumption swinging device not only increases, and thermal field is uneven, and crystal oscillator frequency temperature stability index can only achieve ± 0.5ppm,
Therefore, early stage space flight constant-temperature crystal oscillator equitemperature sensitive components is all placed in temperature chamber, then by temperature chamber outside around
Electric-heating-wire-heating, this design constant-temperature crystal oscillator volume is bigger than normal, does not reach space flight crystal oscillator overall dimensions and is less than
The requirement of (50 × 50 × 70) mm, present space flight constant-temperature crystal oscillator has strict demand to small product size, weight, tradition
Structure is difficult to greatly meet the volume requirement of demand space flight constant-temperature crystal oscillator using non-plastic packaging components and parts volume.And constant temperature is brilliant
Oscillation body device requires the indexs such as frequency stability of temperature again, and existing constant-temperature crystal oscillator can neither meet wanting of small volume
Ask, the requirement of frequency stability of temperature can not be met again.
Content of the invention
The invention aims to overcoming drawbacks described above, provide a kind of frequency stable temperature stability good, small volume
Space flight 100MHz altofrequency constant-temperature crystal oscillator.
For achieving the above object, a kind of space flight 100MHz altofrequency constant-temperature crystal oscillator of present invention design, including
Power module and main module of shaking, it is particular in that：Also include temperature control modules and amplify output module, described power supply mould
The outfan of block is connected with manostat, and the outfan of manostat connects main module of shaking, temperature control modules respectively and amplifies output
Module, power module is powered to main module of shaking, temperature control modules and amplification output module after manostat carries out voltage stabilizing；Institute
The input of the outfan and main module of shaking of stating temperature control modules is connected, the environment to main module of shaking for the described temperature control modules
Temperature is controlled, described master shake module outfan with amplify output module input be connected；
Described crystal oscillator oscillation module is made up of master-oscillator circuit and tuning network, and the outfan of described master-oscillator circuit connects
The input of described tuning network；
Described temperature control modules are made up of heater circuit and temperature control circuit, and the outfan of described temperature control circuit is added with described
The input of heater circuit connects, for controlling the temperature spot of heater circuit output, respectively with described master-oscillator circuit, tuning network
Connect, for described master-oscillator circuit, tuning network heating, for being heated and maintained to master-oscillator circuit, tuning network
Work under stationary temperature；
Described amplification output module includes cascode crystal triode, LC tuning network, isolation filter network, and described cascode is brilliant
The colelctor electrode of body audion is connected with LC tuning network, and the outfan of described cascode crystal triode connects isolation filter network.
In technique scheme, the heater circuit heating surface of described temperature control modules is welded on copper plate；Described
The cascode crystal triode pin amplifying the module of output module passes through copper plate, cascode crystal triode bottom enclosure and red copper
It is spaced 0.2mm between plate；The shell of crystal oscillator oscillation module is close to copper plate and is installed.
In technique scheme, described heater circuit includes high-power heating pipe and thermal resistor, high-power heating
The pin of pipe, crystal oscillator oscillation module and cascode crystal triode is each welded to be electrically connected on pcb board, described cascode crystal three
The surrounding of pole pipe is coated with silica gel, and the silica gel scope of described coating within the 3/4 of shell bottom sides length, install by thermal resistor
Between crystal resonator and heating power pipe.
In technique scheme, the manostat that described power module outlet connects is three terminal regulator.
The constant-temperature crystal oscillator operating frequency of present invention design is 100MHz, supply voltage is 12V, and frequency temperature is stable
Property be better than ± 0.05ppm, phase noise is better than -155dBc/Hz@1kHz, and volume is（40×40×16）Mm, temperature chamber is using fixed
The copper plate heat transfer modes heating of system, compares more than traditional temperature chamber volume-diminished twice.
Temperature chamber this constant-temperature crystal oscillator frequency stability of temperature index after this invention is improved very well, using not Tongan City
The 100MHz constant-temperature crystal oscillator frequency-temperature stability test data of dress mode see table 1：
Table 1 100MHz constant-temperature crystal oscillator frequency-temperature stability test data
On the basis of passing through many-sided theory analysis and practical experience for many years, first device in the circuit set by the present invention
Part parameter is made as finished product crystal oscillator after suitable adjustment, and this crystal oscillator can meet small size, high frequency on the whole
Rate-temperature stability, Low phase noise and high reliability etc. require.
The present invention taken into full account in the design process product processing, use reliability, the requirement of small volume, and
Degree of stability, Low phase noise require the relation of mutually restriction, through COMPREHENSIVE CALCULATING checking it is ensured that electrical parameter level is stable, have stronger
Practicality.
The present invention has advantages below：
1st, temperature chamber, using customization copper plate heat transfer modes heating, can not only reduce the volume of temperature chamber, also can make big work(
The heat utilization ratio of rate heating tube is higher, reduces the power consumption of crystal oscillator；The heating of crystal is more uniform simultaneously, improves frequency
Rate-temperature stability index.
2nd, the circuit design of the present invention, not only reduces the usage quantity of components and parts, reduces crystal oscillator on the whole
Volume, decrease the introduced noise of components and parts.
3rd, oscillator stage oscillating tube is done using Low phase noise crystal triode, and add reasonable debugging, improve crystal oscillator
Index of mutually making an uproar.
Brief description
Fig. 1 is a kind of overall structure diagram of space flight 100MHz altofrequency temperature stability constant-temperature crystal oscillator；
Fig. 2 is the circuit theory diagrams of space flight 100MHz altofrequency temperature stability constant-temperature crystal oscillator in Fig. 1；
In figure：1- power module；2- master shakes module；3- temperature control modules；4- amplifies output module；5- copper plate；6-
Pcb board；7- thermal resistor；8- crystal resonator；9- heating power pipe.
Specific embodiment
Below in conjunction with accompanying drawing and instantiation, the present invention is described in further detail：
The 100MHz altofrequency temperature stability constant-temperature crystal oscillator of space flight as shown in Figure 1 and Figure 2, including power supply mould
Block 1, main module 2 of shaking, temperature control modules 3 and amplification output module 4.
The outfan of power module 1 is connected with manostat, and the outfan of manostat connects main shake module 2, temperature control respectively
Molding block 3 and amplification output module 4, power module 1 is after three terminal regulator carries out voltage stabilizing to main shake module 2, temperature control
Module 3 and amplification output module 4 are powered；Make main shake module 2 and the stable operating voltage of temperature control modules 3, reduce power supply electricity
The impact to oscillating circuit for the buckling, temperature control modules 3 are controlled to the ambient temperature of main module 2 of shaking, main module 2 of shaking
Outfan is connected with the input amplifying output module 4；Crystal oscillator oscillation module 2 is made up of master-oscillator circuit and tuning network, main
The outfan of vibration level circuit connects the input of tuning network；Master-oscillator circuit adopt Ke Er hereby overtone circuit as the first order
Master-oscillator circuit, crystal is located in feedback network, as an inductance element of oscillation circuit, together with other elements in loop
Participate in vibration, that is, constitute capacitance three-point type circuit, output is amplified using one-level vibration one-level, reduces component number, reduce body
Long-pending.Crystal from SC cut 100MHz5 overtone HC-35/U cold welding encapsulation crystal, due to SC cut crystal frequency spectrum more complicated,
There are tri- kinds of vibration modes of A, B, C, and we need to use is C mould 100MHz overtone oscillation frequency.A mould vibration ratio C
Mould is high by 87%, will not make troubles to circuit design, and B mould frequency of vibration is only high by 9.4% than C mould, and its equivalent series resistance
With C mould quite, sometimes even more little, therefore B mould is easier starting of oscillation, forms B mould Suppression network by the LC tuning network of colelctor electrode,
Make network during C mould overtone oscillation be in capacitive, and during B mode oscillation, network is in perception, thus suppressing B mode oscillation.C mould fundamental frequency equivalent
Series resistance very little, easy starting of oscillation, therefore adopt fundamental frequency Suppression network resonance FREQUENCY CONTROL out in fundamental frequency and three overtones
Between, make C mould fundamental frequency be in perception thus suppressing its base frequency oscillation.
Temperature control modules 3 are made up of heater circuit and temperature control circuit, and the outfan of temperature control circuit is defeated with heater circuit
Enter end to connect, for controlling the temperature spot of heater circuit output, heater circuit is used for heating simultaneously to master-oscillator circuit, tuning network
Keep working at a constant temperature, heater circuit, by heating to master-oscillator circuit, tuning network, makes this partial circuit
In steady temperature, by temperature control circuit control, temperature control circuit is high-accuracy DC bridge temperature control to this steady temperature point to energy steady operation
Circuit, makes temperature chamber temperature substantially remain in the inflection temperature of crystal（Crystal works near inflection temperature, its frequency temperature system
Number is minimum）, allow crystal to be operated in a constant inflection temperature environment.Thermal resistor is comprised, heat in described direct-current bridge
Sensitive resistor 7 is arranged between crystal resonator 8 and heating power pipe 9 and carries out quick temperature-sensitive, crystal resonator and heating power
Pipe is arranged in special conducting copper plate, after described temperature-adjusting circuit is the heating of heating power pipe, is carried out by thermal resistor
Temperature-sensitive, after resistance changes, operational amplifier controls amplidyne by computing output signal.
Amplify output module 4 and include Low phase noise cascode crystal triode, LC tuning network, isolation filter network, cascode is brilliant
The colelctor electrode of body audion is connected with LC tuning network, and the outfan of cascode crystal triode connects isolation filter network, mainly
Feature is output frequency f needed for selectivity amplifies0, increase f0Output suppresses f0Harmonic wave (containing subharmonic) reach improvement excellent
Change output signal purpose.Low phase noise crystal triode is selected to do oscillator stage oscillating tube, rationally debugging transistor static work point-like
State, controls crystal oscillation excitation, makes crystal oscillator export stable low phase noise cancellation signal, output circuit includes LC network and isolation
Filter network, while suppressing harmonic wave further, reaches the buffer action of oscillator signal output and load, improves load special
Property.
Copper coin is welded on pcb board 6 relevant position, high-power heating pipe heating surface is welded on copper plate 5, in copper plate
Relevant position punching on 5, allows crystal resonator and crystal triode lead component's feet pass through copper coin, crystal resonator shell
It is close to copper coin to install；Due to crystal triode shell and pin conducting, when crystal triode is installed, audion bottom enclosure need to be made
It is spaced 0.2mm and copper coin between.The heater circuit heating surface of temperature control modules 3 is welded on 1.0mm thickness copper plate 5, red copper
5 materials conducting heat for temperature chamber made by plate；Amplify the cascode crystal triode of output module 4, the pin of LC tuning network is worn respectively
Cross copper plate 5, between cascode crystal triode bottom enclosure and copper plate, be spaced 0.2mm；The shell of crystal oscillator oscillation module 2 is close to
Copper plate 5 is installed, and copper coin is welded on pcb board 6 relevant position, and high-power heating pipe heating surface is welded on copper plate 5, in purple
Relevant position punching on copper coin 5, allows crystal resonator and crystal triode lead component's feet pass through copper coin, crystal resonator
Shell is close to copper coin and is installed；Due to crystal triode shell and pin conducting, when crystal triode is installed, audion bottom need to be made
It is spaced 0.2mm between shell and copper coin.
Heater circuit includes high-power heating pipe 9 and thermal resistor 7, high-power heating pipe 9, crystal resonator 8 and altogether
The pin penetrating crystal triode is each welded to be electrically connected on pcb board 6, and the surrounding of cascode crystal triode is coated with silica gel,
The silica gel scope of coating, within the 3/4 of shell bottom sides length, so meets《Aerospace electron electric product components and parts through hole is pacified
Dress technical requirements》Installation provision, the heat on copper plate 5 can be made quickly to be delivered on crystal triode, thus ensureing crystalline substance again
The frequency stability of temperature index of oscillation body device meets requirement.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (1)
1. a kind of space flight 100MHz altofrequency constant-temperature crystal oscillator, including power module (1) and main module (2) of shaking, it is special
Levy and be：Also include temperature control modules (3) and amplify output module (4),
The outfan of described power module (1) is connected with manostat, and the outfan of manostat connects main module (2) of shaking, temperature respectively
Degree control module (3) and amplify output module (4), power module (1) after manostat carries out voltage stabilizing to lead shake module (2),
Temperature control modules (3) and amplification output module (4) power supply；The outfan of described temperature control modules (3) and main module (2) of shaking
Input connect, described master shake module (2) outfan with amplification output module (4) input be connected；
Described master module (2) of shaking is made up of master-oscillator circuit and tuning network, and the outfan of described master-oscillator circuit connects described
The input of tuning network；
Described temperature control modules (3) are made up of heater circuit and temperature control circuit, and the outfan of described temperature control circuit is added with described
The input of heater circuit connects, for controlling the temperature spot of heater circuit output, the outfan of described heater circuit respectively with institute
State master-oscillator circuit, tuning network connects, for being heated and maintained at work under stationary temperature to master-oscillator circuit, tuning network
Make；
Described amplification output module (4) includes cascode crystal triode, LC tuning network, isolation filter network, and described cascode is brilliant
The colelctor electrode of body audion is connected with LC tuning network, and the outfan of described cascode crystal triode connects isolation filter network；
The heater circuit heating surface of described temperature control modules (3) is welded on copper plate (5)；Described amplification output module (4)
Cascode crystal triode, the pin of LC tuning network be each passed through copper plate (5), cascode crystal triode bottom enclosure with purple
It is spaced 0.2mm between copper coin；The shell of crystal oscillator oscillation module (2) is close to copper plate (5) and is installed；
Described heater circuit includes high-power heating pipe and thermal resistor, high-power heating pipe, crystal oscillator oscillation module (2) and altogether
The pin penetrating crystal triode is each welded to be electrically connected on pcb board, and the surrounding of described cascode crystal triode is coated with silicon
Glue, within the 3/4 of shell bottom sides length, thermal resistor is arranged on crystal resonator and heating to the silica gel scope of described coating
Between power tube；
The manostat that described power module (1) outfan connects is three terminal regulator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310614087.7A CN103607198B (en) | 2013-11-27 | 2013-11-27 | 100MHz high-frequency constant temperature crystal oscillator for spaceflight |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310614087.7A CN103607198B (en) | 2013-11-27 | 2013-11-27 | 100MHz high-frequency constant temperature crystal oscillator for spaceflight |
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| CN103607198A CN103607198A (en) | 2014-02-26 |
| CN103607198B true CN103607198B (en) | 2017-02-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106533363A (en) * | 2016-11-02 | 2017-03-22 | 河北鸿捷电子科技有限公司 | Multi-gate oscillation low-phase-noise constant-temperature crystal oscillator |
| JP2019213111A (en) * | 2018-06-07 | 2019-12-12 | セイコーエプソン株式会社 | Oscillator, electronic apparatus, and movable body |
| CN109687865A (en) * | 2018-12-02 | 2019-04-26 | 南京中电熊猫晶体科技有限公司 | A kind of big pressure controlled constant tempeature crystal oscillator of small size |
| CN113315472B (en) * | 2021-04-30 | 2023-06-09 | 武汉海创电子股份有限公司 | Special thick film circuit for constant temperature crystal oscillator for spaceflight |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6292066B1 (en) * | 1997-07-11 | 2001-09-18 | Matsushita Electric Industrial Co., Ltd. | Function generator, crystal oscillation device and method of adjusting crystal oscillation device |
| 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 |
| 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 |
| CN203596811U (en) * | 2013-11-27 | 2014-05-14 | 武汉海创电子股份有限公司 | 100MHz high-frequency constant temperature crystal oscillator for spaceflight |
-
2013
- 2013-11-27 CN CN201310614087.7A patent/CN103607198B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6292066B1 (en) * | 1997-07-11 | 2001-09-18 | Matsushita Electric Industrial Co., Ltd. | Function generator, crystal oscillation device and method of adjusting crystal oscillation device |
| 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 |
| 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 |
| CN203596811U (en) * | 2013-11-27 | 2014-05-14 | 武汉海创电子股份有限公司 | 100MHz high-frequency constant temperature crystal oscillator for spaceflight |
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