CN203896310U - Temperature control structure of single-slot constant-temperature crystal oscillator - Google Patents
Temperature control structure of single-slot constant-temperature crystal oscillator Download PDFInfo
- Publication number
- CN203896310U CN203896310U CN201420335929.5U CN201420335929U CN203896310U CN 203896310 U CN203896310 U CN 203896310U CN 201420335929 U CN201420335929 U CN 201420335929U CN 203896310 U CN203896310 U CN 203896310U
- Authority
- CN
- China
- Prior art keywords
- temperature
- resistance
- thermostat
- constant
- crystal oscillator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a temperature control structure of a single-slot constant-temperature crystal oscillator, which comprises a first PCB (printed circuit board), a constant temperature slot, a second PCB and a temperature control circuit, wherein the first PCB is provided with a crystal oscillation circuit, the first PCB and the crystal oscillation circuit are accommodated in the constant temperature slot, the second PCB is used for installing the constant temperature slot, the temperature control circuit comprises two temperature sensors RT1, RT2 and a power tube, the temperature sensor RT1 is located in the constant temperature slot and thermally connected with the constant temperature slot, the power tube is arranged at the outer wall of the constant temperature slot, the temperature sensor RT2 and other residual components of the temperature control circuit are installed on the second PCB, and the temperature sensor RT2 is located at the external part of the constant temperature slot. According to the utility model, the internal temperature of the constant temperature slot is sensed through the temperature sensor RT1, variations in environment temperature outside the constant temperature slot are sensed through the RT2, and constant temperature of the crystal oscillation circuit is accurately controlled by using the temperature gradient between the two temperature sensors, thereby enabling the temperature control precision of the constant temperature slot to achieve a few thousandths of a degree centigrade, and effectively improving the temperature stability of the constant-temperature crystal oscillator.
Description
Technical field
The utility model relates to a kind of single groove constant-temperature crystal oscillator, particularly relates to the temperature-control structure that crystal oscillator temperature stability and short-term frequency stability is had to low frequency (as the 10MHz) constant temperature crystal oscillator with high stability of special requirement.
Background technology
Along with further developing of electronic technology, communication system is more and more higher to the requirement of system reference signal or time reference, time command territory, the requirement of the frequency stability to high stability crystal oscillator also more comes approximately harsh.Reach regulation high stability (as temperature stability be better than ± 1 × 10
-9@(20 ~+70 DEG C); The short 1e that is surely better than
-12), need to take various even special technical finesse mode.
In prior art, require high constant-temperature crystal oscillator generally to adopt double flute constant temperature technology to solve to temperature stability, double flute temperature-control structure has reduced the temperature gradient between temperature sensor and crystal resonator, thereby can reach very high temperature-controlled precision, and this thermostatic mode can reach 10
-10the temperature stability of magnitude, but its inherent characteristic has determined such product structure design complexity, assembling and setting is all comparatively difficult, and batch productivity is inadequate.Conventional single groove constant-temperature crystal oscillator is generally to adopt power tube to carry out constant temperature processing to crystal resonator and its main vibration circuit, and power tube directly directly heats crystal resonator, so also can obtain little coefficient 10
-9the frequency temperature stability (the secondary clock adopting as a large amount of in current commercial communication market) of magnitude, this series products has low in energy consumption, the advantage that stabilization time is fast, but owing to adopting the directly mode to resonator heated constant temperature, thermal capacity is less, cause crystal oscillator output signal frequency more responsive to the fluctuation ratio of ambient temperature, short-term frequency stability (Allan variance) index of product is difficult to further raising.
Utility model content
For above-mentioned the problems of the prior art, the utility model provide a kind of reasonable in design, simple in structure, debugging is simple, the temperature-control structure of realizing single groove constant-temperature crystal oscillator of higher temperature stability and short-term frequency stability with easy single groove constant temperature technology.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of temperature-control structure of single groove constant-temperature crystal oscillator, comprise the first pcb board that is provided with crystal oscillating circuit, the first pcb board and crystal oscillating circuit are all held to thermostat in the inner, for the second pcb board of thermostat is installed, and include the temperature-adjusting circuit of two temperature sensor RT1, RT2 and power tube, wherein, temperature sensor RT1 is positioned at thermostat hot link with it, power tube is arranged at thermostat outer wall, other remainder in temperature sensor RT2 and temperature-adjusting circuit are installed on the second pcb board, and temperature sensor RT2 is positioned at thermostat outside.Described crystal oscillating circuit is mainly made up of crystal resonator and oscillating circuit thereof.
Further, between described temperature sensor RT2 and thermostat, there is the gap of 0.5 ~ 2mm.
Further, described gap is the clearance groove being opened on the second pcb board.
Preferred as one, the distance in described gap is 1mm.
Preferred as one, described power tube is 2, lays respectively at two offsides of thermostat outer wall.
Further particularly, described thermostat comprises the cell body being connected with the second pcb board, and coordinates cell body and the second pcb board by the cover plate of space-closed in groove.
Further particularly, described temperature-adjusting circuit comprises the operational amplifier U1 that inverting input is connected with temperature sensor RT1, be connected in the resistance R 5 between operational amplifier U1 inverting input and power supply VREF, resistance R 7 and the resistance R 9 in parallel with resistance R 5 after series connection successively, be connected in the resistance R 3 between operational amplifier U1 in-phase input end and power supply VREF, one end is connected with operational amplifier U1 in-phase input end and the resistance R 4 of other end ground connection, and the resistance R 13 that is connected with operational amplifier U1 inverting input and output respectively of two ends, wherein, power tube is connected with operational amplifier U1 output, power supply VREF is operational amplifier U1 power supply by resistance R 10, described temperature sensor RT2 one end ground connection and the other end are connected between resistance R 7 and resistance R 9.
Further, described power tube comprises the resistance R 2 that one end is connected with operational amplifier U1 output, and base stage is connected with resistance R 2 other ends and the triode Q1 of grounded collector, and is connected in the resistance R 1 between triode Q1 emitter and power supply VCC;
Or described power tube comprises the resistance R 12 that one end is connected with operational amplifier U1 output, base stage is connected with resistance R 12 other ends and the triode Q2 of grounded collector, and is connected in the resistance R 11 between triode Q2 emitter and power supply VCC.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is by the temperature of two temperature sensor senses thermostats, wherein RT1 induction thermostat internal temperature, its temperature controlling point arranges near the flex point of crystal resonator, the variation of ambient temperature of RT2 induction thermostat outside, its temperature controlling point is located at the central value of range of temperature, utilize two temperature gradients between temperature sensor to reach the accurate thermostat temperature of controlling crystal oscillating circuit, make the temperature control precision of thermostat can reach some thousandths of degree, effectively improve the temperature stability of constant-temperature crystal oscillator, there is substantive distinguishing features and progress, and the utility model is simple in structure, reasonable in design, debugging is simple, use flexibly, there is market application foreground widely, be applicable to applying.
(2) the utility model adopts power tube to heat on thermostat, to realize the heating of crystal oscillating circuit entirety, increase on the one hand thermal capacity, make on the other hand environmental temperature fluctuation reduce as far as possible the frequency influence of resonator, if adopt again on this basis special low noise oscillating circuit, can also further improve the short-term frequency stability of crystal oscillator signal, to improve the time domain index of signal.
Brief description of the drawings
Fig. 1 is positive plan structure schematic diagram of the present utility model.
Fig. 2 is the upward view of Fig. 1.
Fig. 3 is perspective structure schematic diagram of the present utility model.
Fig. 4 is the circuit theory diagrams of temperature-adjusting circuit in the utility model.
In above-mentioned accompanying drawing, the component names that Reference numeral is corresponding is as follows:
1-the first pcb board, 2-the second pcb board, 3-crystal resonator, 4-temperature sensor RT1,5-temperature sensor RT2,6-thermostat, 7-power tube.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and execution mode of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figures 1 to 4, the temperature-control structure of this list groove constant-temperature crystal oscillator, comprises the second pcb board 2, is arranged on the thermostat 6 on the second pcb board, and is arranged on the first pcb board 1 in thermostat.Wherein, crystal oscillating circuit is arranged on the first pcb board, and crystal oscillating circuit is mainly made up of crystal resonator 3 and oscillating circuit thereof, the second pcb board is provided with temperature-adjusting circuit, this temperature-adjusting circuit comprises the temperature sensor RT1 4 for responding to temperature in thermostat, for responding to the temperature sensor RT2 5 of thermostat external temperature, for keeping the power tube 7 of temperature in thermostat, the operational amplifier U1 that inverting input is connected with temperature sensor RT1, be connected in the resistance R 5 between operational amplifier U1 inverting input and power supply VREF, resistance R 7 and the resistance R 9 in parallel with resistance R 5 after series connection successively, be connected in the resistance R 3 between operational amplifier U1 in-phase input end and power supply VREF, one end is connected with operational amplifier U1 in-phase input end and the resistance R 4 of other end ground connection, and the resistance R 13 that is connected with operational amplifier U1 inverting input and output respectively of two ends, wherein, power tube is connected with operational amplifier U1 output, power supply VREF is operational amplifier U1 power supply by resistance R 10, described temperature sensor RT2 one end ground connection and the other end are connected between resistance R 7 and resistance R 9.Particularly, temperature sensor RT1 is arranged on the first pcb board and is positioned at thermostat and hot link with it; Temperature sensor RT2 is arranged on the second pcb board and is positioned at the outer gap that also has with it a 1mm of thermostat, and this gap is the clearance groove being opened on the second pcb board; Power tube has two, is directly welded in respectively two offsides of thermostat outer wall; Other devices in temperature-adjusting circuit are all arranged on the second pcb board in addition.
One of them power tube comprises the resistance R 2 that one end is connected with operational amplifier U1 output, and base stage is connected with resistance R 2 other ends and the triode Q1 of grounded collector, and is connected in the resistance R 1 between triode Q1 emitter and power supply VCC; Another power tube comprises the resistance R 12 that one end is connected with operational amplifier U1 output, and base stage is connected with resistance R 12 other ends and the triode Q2 of grounded collector, and is connected in the resistance R 11 between triode Q2 emitter and power supply VCC.
Further particularly, described thermostat comprises the cell body being connected with the second pcb board, and coordinates cell body and the second pcb board that space-closed in groove is formed to thermosealed cover plate.
Temperature sensor RT1 detects temperature spot in thermostat, ensure that it is operated near crystal resonator zero temperature coefficient point, temperature sensor RT2 detects the ambient temperature outside thermostat, control its balance point near the central point of product set point of temperature scope by resistance R 7, its temperature gradient value is controlled by resistance R 9, the value of regulating resistance R9 can exactly the temperature of thermostat inside be controlled near crystal resonator flex point certain a bit on, temperature-controlled precision can be improved to the magnitude of some thousandths of, thereby effectively improves the temperature stability index of product.
In addition, in the utility model, power tube does not directly heat crystal resonator, and thermostat entirety is heated, thereby to the heating of crystal oscillating circuit entirety, because the thermal capacity of thermostat is enough large, can make the fluctuation of thermostat internal temperature be controlled at a less scope, the time domain stability characteristic that improves crystal oscillator is also had greatly improved.
Finally also it is to be noted, the utility model only arranges a thermostat in constant-temperature crystal oscillator, there is essential distinction with double flute constant temperature technology of the prior art, and relative and existing single groove constant temperature technology, make full use of two thermal gradients between temperature sensor, reach the object of accurate control thermostat temperature, circuit arranges simply, operation is also than double flute convenient temperature control, and effect is also obvious than existing single groove temperature control.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
According to above-described embodiment, just can realize well the utility model.What deserves to be explained is; under prerequisite based on said structure design; for solving same technical problem; even if some that make on the utility model are without substantial change or polishing; the essence of the technical scheme adopting is still consistent with the utility model, also should be in protection range of the present utility model.
Claims (8)
1. the temperature-control structure of a single groove constant-temperature crystal oscillator, it is characterized in that, comprise the first pcb board that is provided with crystal oscillating circuit, the first pcb board and crystal oscillating circuit are all held to thermostat in the inner, for the second pcb board of thermostat is installed, and include two temperature sensor RT1, the temperature-adjusting circuit of RT2 and power tube, wherein, temperature sensor RT1 is positioned at thermostat hot link with it, power tube is arranged at thermostat outer wall, other remainder in temperature sensor RT2 and temperature-adjusting circuit are installed on the second pcb board, and temperature sensor RT2 is positioned at thermostat outside.
2. the temperature-control structure of a kind of single groove constant-temperature crystal oscillator according to claim 1, is characterized in that, has the gap of 0.5 ~ 2mm between described temperature sensor RT2 and thermostat.
3. the temperature-control structure of a kind of single groove constant-temperature crystal oscillator according to claim 2, is characterized in that, described gap is the clearance groove being opened on the second pcb board.
4. the temperature-control structure of a kind of single groove constant-temperature crystal oscillator according to claim 3, is characterized in that, the distance in described gap is 1mm.
5. the temperature-control structure of a kind of single groove constant-temperature crystal oscillator according to claim 1, is characterized in that, described power tube is 2, lays respectively at two offsides of thermostat outer wall.
6. according to the temperature-control structure of a kind of single groove constant-temperature crystal oscillator described in claim 1 ~ 4 any one, it is characterized in that, described thermostat comprises the cell body being connected with the second pcb board, and coordinates cell body and the second pcb board by the cover plate of space-closed in groove.
7. according to the temperature-control structure of a kind of single groove constant-temperature crystal oscillator described in claim 1 ~ 4 any one, it is characterized in that, described temperature-adjusting circuit comprises the operational amplifier U1 that inverting input is connected with temperature sensor RT1, be connected in the resistance R 5 between operational amplifier U1 inverting input and power supply VREF, resistance R 7 and the resistance R 9 in parallel with resistance R 5 after series connection successively, be connected in the resistance R 3 between operational amplifier U1 in-phase input end and power supply VREF, one end is connected with operational amplifier U1 in-phase input end and the resistance R 4 of other end ground connection, and the resistance R 13 that is connected with operational amplifier U1 inverting input and output respectively of two ends, wherein, power tube is connected with operational amplifier U1 output, power supply VREF is operational amplifier U1 power supply by resistance R 10, described temperature sensor RT2 one end ground connection and the other end are connected between resistance R 7 and resistance R 9.
8. the temperature-control structure of a kind of single groove constant-temperature crystal oscillator according to claim 7, it is characterized in that, described power tube comprises the resistance R 2 that one end is connected with operational amplifier U1 output, base stage is connected with resistance R 2 other ends and the triode Q1 of grounded collector, and is connected in the resistance R 1 between triode Q1 emitter and power supply VCC;
Or described power tube comprises the resistance R 12 that one end is connected with operational amplifier U1 output, base stage is connected with resistance R 12 other ends and the triode Q2 of grounded collector, and is connected in the resistance R 11 between triode Q2 emitter and power supply VCC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420335929.5U CN203896310U (en) | 2014-06-23 | 2014-06-23 | Temperature control structure of single-slot constant-temperature crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420335929.5U CN203896310U (en) | 2014-06-23 | 2014-06-23 | Temperature control structure of single-slot constant-temperature crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203896310U true CN203896310U (en) | 2014-10-22 |
Family
ID=51722662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420335929.5U Active CN203896310U (en) | 2014-06-23 | 2014-06-23 | Temperature control structure of single-slot constant-temperature crystal oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203896310U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559070A (en) * | 2016-10-18 | 2017-04-05 | 北京无线电计量测试研究所 | A kind of constant-temperature crystal oscillator |
| CN114047796A (en) * | 2022-01-12 | 2022-02-15 | 北京晨晶精仪电子有限公司 | Temperature control circuit, constant temperature crystal oscillator circuit and constant temperature crystal oscillator |
| CN116073819A (en) * | 2023-03-07 | 2023-05-05 | 成都世源频控技术股份有限公司 | Temperature control circuit of rapid stable constant-temperature crystal oscillator and implementation method thereof |
-
2014
- 2014-06-23 CN CN201420335929.5U patent/CN203896310U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559070A (en) * | 2016-10-18 | 2017-04-05 | 北京无线电计量测试研究所 | A kind of constant-temperature crystal oscillator |
| CN114047796A (en) * | 2022-01-12 | 2022-02-15 | 北京晨晶精仪电子有限公司 | Temperature control circuit, constant temperature crystal oscillator circuit and constant temperature crystal oscillator |
| CN114047796B (en) * | 2022-01-12 | 2022-04-05 | 北京晨晶精仪电子有限公司 | Temperature control circuit, constant temperature crystal oscillator circuit and constant temperature crystal oscillator |
| CN116073819A (en) * | 2023-03-07 | 2023-05-05 | 成都世源频控技术股份有限公司 | Temperature control circuit of rapid stable constant-temperature crystal oscillator and implementation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203896310U (en) | Temperature control structure of single-slot constant-temperature crystal oscillator | |
| CN101860322B (en) | Automatic temperature controlled crystal oscillator | |
| CN202795090U (en) | Oven controlled crystal oscillator and temperature control circuit thereof | |
| US8749314B2 (en) | Oven-controlled crystal oscillator | |
| CN205656518U (en) | Constant temperature control system | |
| CN201134053Y (en) | Linear temperature-control circuit of gyroscopes | |
| CN207182129U (en) | Ship optical fiber gyroscope instrument temperature-controlled cabinet | |
| CN203480336U (en) | A temperature controller using novel temperature acquisition technology | |
| CN103863581A (en) | Indirect thermal control device for high resolution optical remote sensor precision temperature control | |
| CN205017611U (en) | Temperature control system of electron cigarette heat -generating body | |
| CN102279764A (en) | Method for normally starting reinforced cloud server at ultra-low temperature | |
| CN101950187A (en) | Temperature control device and temperature control method for foot bath device | |
| CN104199488A (en) | Constant-temperature control device and method for reaction liquid in cuvette of full-automatic biochemical analyzer | |
| CN102368163A (en) | Temperature control system with environment temperature compensating function | |
| CN101997483B (en) | Method and device for controlling oven-controlled crystal oscillator by microcomputer | |
| CN107329507A (en) | A kind of thermostatic control system | |
| CN203119873U (en) | Atomic frequency standard temperature compensating system and atomic frequency standard | |
| US20130222073A1 (en) | Design and Control of Multi-Temperature Micro-Oven for MEMS Devices | |
| CN103607198A (en) | 100MHz high-frequency constant temperature crystal oscillator for spaceflight | |
| CN204743707U (en) | A low -temperature constant -temperature cook pot for cooking vacuum packaging food | |
| CN205449641U (en) | Metal bath optics temperature measuring device | |
| CN203054641U (en) | Chamber bubble system temperature control performance evaluation device | |
| CN203084575U (en) | Device for assessment of temperature control performance of spectroscopic lamp | |
| CN203596811U (en) | 100MHz high-frequency constant temperature crystal oscillator for spaceflight | |
| CN202759412U (en) | Low aging rate super-wide constant temperature crystal oscillator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 610000, Sichuan, Wuhou District Province, four Xing Road, No. 7, building 2, 166, 1, 4, 5, 2, 3, 4, 5, 6,, 7 Patentee after: Chengdu Shiyuan frequency control technology Limited by Share Ltd Address before: 610000, B, unit 3, 5, 6, 7, No. 166, No. four, Wu Xing Road, 7, Sichuan, Chengdu, Wuhou District, China Patentee before: CHENGDU SHIYUAN FREQUENCY CONTROL TECHNOLOGY CO., LTD. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Temperature control structure of single-slot constant-temperature crystal oscillator Effective date of registration: 20170527 Granted publication date: 20141022 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: Chengdu Shiyuan frequency control technology Limited by Share Ltd Registration number: 2017510000028 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220209 Granted publication date: 20141022 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: CHENGDU SHIYUAN FREQUENCY CONTROL TECHNOLOGY CO.,LTD. Registration number: 2017510000028 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |