CN114115416A - Reference source for precisely adjusting voltage - Google Patents
Reference source for precisely adjusting voltage Download PDFInfo
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- CN114115416A CN114115416A CN202111328526.9A CN202111328526A CN114115416A CN 114115416 A CN114115416 A CN 114115416A CN 202111328526 A CN202111328526 A CN 202111328526A CN 114115416 A CN114115416 A CN 114115416A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 21
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/567—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for temperature compensation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The invention provides a reference source for precisely regulating voltage, which comprises a reference voltage circuit, a precise regulating circuit and a connector G1; the middle reference voltage circuit of the device outputs 10V reference voltage by using a high-precision voltage reference chip, and the middle reference voltage circuit has extremely low temperature coefficient and output noise which respectively reach 5 ppm/DEG C and 4 mu Vpp; the precision adjusting circuit realizes precision adjustment within a reference voltage output range through the cooperation of the differential precision adjusting circuit and the adjusting resistors R1 and R5; meanwhile, the high-precision temperature control box is utilized to effectively inhibit noise introduced to the reference voltage and the precision regulating circuit due to temperature change. In conclusion, the invention has the advantages of small volume, easy integration, low noise, continuous and precise adjustment of output voltage and the like, can precisely adjust the zero point of an error signal, realizes high-quality signal feedback, and can effectively reduce laser noise and improve the sensitivity of a gravitational wave detector when being applied to gravitational wave detection.
Description
Technical Field
The invention relates to the technical field of photoelectric feedback control, in particular to a reference source for precisely adjusting voltage.
Background
In 2015, successful detection of gravitational waves, observation of visible light by using a telescope and acquisition of useful information of radio wave bands by using a radio telescope are called three achievements, wherein the gravitational waves bring much astronomical phenomenon information which has never been observed before due to unique properties of the gravitational waves, and a new window in electromagnetic spectrum research is opened.
The frequency range detected by the foundation gravitational wave is 10Hz-10kHz, and the detectable frequency range of the space gravitational wave is lower and can reach 0.1mHz-1Hz, so that the key point for realizing the foundation gravitational wave is that the foundation gravitational wave has extremely high detection sensitivity, and the detector needs to have extremely low noise. The light source in the detector is used as a main noise source, and the noise reduction is usually performed by adopting an active feedback mode, while the reference source is used as a key loop of a feedback loop, and the noise magnitude of the reference source determines the noise reduction level of the final light source. In addition, the offset of the error signal in the feedback loop also adversely affects the noise reduction of the light source, and therefore, it is also important to finely adjust the output voltage of the reference source.
The existing reference source can only provide fixed outputs of 10V, 1V and 0.1V and cannot carry out continuous precise adjustment according to the offset of an error signal in a feedback loop; in addition, the reference source is large in size, so that the integration and practical application of the system are not facilitated.
Disclosure of Invention
For solving the shortcoming and the not enough of prior art, provide the reference source of a precision adjustment voltage to can solve current reference source and can't carry out continuous precision adjustment and self bulky problem that leads to unfavorable system's integration and practical application according to error signal's among the feedback loop skew.
The reference source for precisely regulating the voltage comprises a reference voltage circuit and a precise regulating circuit, wherein a port 1 of the reference voltage circuit is connected with a 15V power supply, a port 2 of the reference voltage circuit is grounded, a port 3 of the reference voltage circuit is connected with an input end of the precise regulating circuit, an output end of the precise regulating circuit is connected with an output end of a connector G1, and the reference voltage circuit and the precise regulating circuit are both placed in a high-precision temperature control box and used for reducing the influence of temperature change on the reference voltage circuit and the precise regulating circuit.
As a further improvement of the above solution, the reference voltage circuit includes a chip U1 and capacitors C1-C6, a pin 2 of the chip U1 is connected to one ends of the capacitors C1-C2 and a port 1 of the reference voltage circuit, a pin 4 of the chip U1 is connected to the other ends of the capacitors C1-C2 and the port 2 of the reference voltage circuit, a pin 6 of the chip U1 is connected to one ends of the capacitors C5-C6 and a port 3 of the reference voltage circuit, the other ends of the capacitors C5-C6 are grounded, a pin 8 of the chip U1 is connected to one ends of the capacitors C3-C4, and the other ends of the capacitors C3-C4 are grounded.
As a further improvement of the above scheme, the precision adjusting circuit comprises resistors R1-R2, R4-R5 and a potentiometer R3, one end of the resistor R1 is connected to an input end of the precision adjusting circuit, the other end of the resistor R1 is connected to one end of the resistor R2 and a fixed port 1 of the potentiometer R3, a fixed port 2 of the potentiometer R3 is connected to one ends of the resistors R4-R5, the other end of the resistor R5 is grounded, and the other ends of the resistors R2 and R4 and a sliding port 3 of the potentiometer R3 are connected to an output end of the precision adjusting circuit.
As a further improvement of the scheme, the minimum temperature control precision of the high-precision temperature control box is 0.002 ℃. The invention has the beneficial effects that:
compared with the prior art, the reference voltage circuit of the reference source for precisely adjusting the voltage outputs 10V reference voltage by using the high-precision voltage reference chip, and has extremely low temperature coefficient and output noise which respectively reach 5 ppm/DEG C and 4 mu Vpp; the precision adjusting circuit realizes precision adjustment within a reference voltage output range through the cooperation of the differential precision adjusting circuit and the adjusting resistors R1 and R5; meanwhile, the high-precision temperature control box is utilized to effectively inhibit noise introduced to the reference voltage and the precision regulating circuit due to temperature change.
In conclusion, the invention has the advantages of small volume, easy integration, low noise, continuous and precise adjustment of output voltage and the like, can precisely adjust the zero point of an error signal, realizes high-quality signal feedback, and can effectively reduce laser noise and improve the sensitivity of a gravitational wave detector when being applied to gravitational wave detection.
Drawings
FIG. 1 is a connection diagram of the overall circuit of the present invention;
FIG. 2 is a diagram of the connection between circuits according to the present invention;
FIG. 3 is a graph of voltage output by the connector of the present invention;
FIG. 4 is a graph of relative voltage noise in the range of 0.1mHz-1Hz for the present invention.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
as shown in fig. 1-2, a reference source for precisely adjusting voltage includes a reference voltage circuit and a precise adjustment circuit, where a port 1 of the reference voltage circuit is connected to a 15V power supply, a port 2 of the reference voltage circuit is grounded, a port 3 of the reference voltage circuit is connected to an input terminal of the precise adjustment circuit, an output terminal of the precise adjustment circuit is connected to an output terminal of a connector G1, and both the reference voltage circuit and the precise adjustment circuit are placed in a high-precision temperature control box to reduce the influence of temperature variation on the reference voltage circuit and the precise adjustment circuit; wherein: the reference voltage circuit comprises a chip U1 and capacitors C1-C6, wherein a pin 2 of the chip U1 is connected with one ends of the capacitors C1-C2 and a port 1 of the reference voltage circuit, a pin 4 of the chip U1 is connected with the other ends of the capacitors C1-C2 and a port 2 of the reference voltage circuit, a pin 6 of the chip U1 is connected with one ends of the capacitors C5-C6 and a port 3 of the reference voltage circuit, the other ends of the capacitors C5-C6 are grounded, a pin 8 of the chip U1 is connected with one ends of the capacitors C3-C4, and the other ends of the capacitors C3-C4 are grounded; the precision adjusting circuit comprises resistors R1-R2, R4-R5 and a potentiometer R3, one end of a resistor R1 is connected with the input end of the precision adjusting circuit, the other end of the resistor R1 is connected with one end of a resistor R2 and a fixed port 1 of the potentiometer R3, a fixed port 2 of a potentiometer R3 is connected with one ends of resistors R4-R5, the other end of the resistor R5 is grounded, and the other ends of the resistors R2 and R4 and a sliding port 3 of the potentiometer R3 are connected with the output end of the precision adjusting circuit; the minimum temperature control precision of the high-precision temperature control box is 0.002 ℃;
in the embodiment, the chip U1 adopts an AD587UQ chip, and the joint G1 adopts an SMA joint.
FIG. 3 is a graph of different output voltages of the precision regulated voltage reference according to the present invention. Different combinations of resistor R1 and resistor R5 may be selected depending on different output voltage range requirements. When the resistor R1 is 10, the resistor R2 is 10, and the resistor R5 is 300, the output voltage range is 9.40171V-9.65908V.
FIG. 4 is a graph of relative voltage noise for a precision regulated voltage reference source of the present invention over a range of 0.1mHz-1 Hz. The output voltage of the precision regulation voltage reference source is collected by an 8-bit semi-high precision instrument 3458A, and the collection time reaches 72 hours. Firstly, according to an acquired time sequence, calculating the voltage noise spectral density by using a logarithmic coordinate power spectrum density program; then, the relative voltage noise spectral density is obtained by dividing the result of the calculation by the reference source output voltage. In the range of 0.1mHz-1Hz, the relative voltage noise spectral density is lower than 0.002/Hz1/2。
In addition, all circuits of the invention are printed on the circuit board, the circuit board adopts a double-sided board and two sides are paved, the periphery of the chip is not paved, and the signal line is isolated from the power line; the precision voltage reference source is adjusted by adopting an anti-electromagnetic interference technology, and the circuit board is arranged in a customized permalloy metal shell; the power supply adopts a lithium battery.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (4)
1. A reference source for fine tuning a voltage, comprising: including reference voltage circuit and accurate regulating circuit, reference voltage circuit's port 1 is connected with the 15V power, reference voltage circuit's port 2 ground connection, reference voltage circuit's port 3 is connected with accurate regulating circuit's input, accurate regulating circuit's output is connected with the output that connects G1, reference voltage circuit, accurate regulating circuit all place in the high accuracy temperature-sensing box for reduce the temperature variation and to reference voltage circuit, accurate regulating circuit influence.
2. The reference source for fine tuning voltage of claim 1, wherein: the reference voltage circuit comprises a chip U1 and capacitors C1-C6, wherein a pin 2 of the chip U1 is connected with one ends of the capacitors C1-C2 and a port 1 of the reference voltage circuit, a pin 4 of the chip U1 is connected with the other ends of the capacitors C1-C2 and a port 2 of the reference voltage circuit, a pin 6 of the chip U1 is connected with one ends of the capacitors C5-C6 and a port 3 of the reference voltage circuit, the other ends of the capacitors C5-C6 are grounded, a pin 8 of the chip U1 is connected with one ends of the capacitors C3-C4, and the other ends of the capacitors C3-C4 are grounded.
3. The reference source for fine tuning voltage of claim 1, wherein: the precision adjusting circuit comprises resistors R1-R2, R4-R5 and a potentiometer R3, one end of a resistor R1 is connected with the input end of the precision adjusting circuit, the other end of the resistor R1 is connected with one end of a resistor R2 and a fixed port 1 of the potentiometer R3, a fixed port 2 of a potentiometer R3 is connected with one end of a resistor R4-R5, the other end of the resistor R5 is grounded, and the other ends of the resistors R2 and R4 and a sliding port 3 of the potentiometer R3 are connected with the output end of the precision adjusting circuit.
4. The reference source for fine tuning voltage of claim 1, wherein: the minimum temperature control precision of the high-precision temperature control box is 0.002 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111328526.9A CN114115416A (en) | 2021-11-10 | 2021-11-10 | Reference source for precisely adjusting voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111328526.9A CN114115416A (en) | 2021-11-10 | 2021-11-10 | Reference source for precisely adjusting voltage |
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| CN114115416A true CN114115416A (en) | 2022-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949799A (en) * | 2024-03-22 | 2024-04-30 | 吕梁学院 | Method and system for measuring performance of organic spin electronic component based on gate voltage |
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Cited By (2)
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| CN117949799A (en) * | 2024-03-22 | 2024-04-30 | 吕梁学院 | Method and system for measuring performance of organic spin electronic component based on gate voltage |
| CN117949799B (en) * | 2024-03-22 | 2024-06-11 | 吕梁学院 | Method and system for measuring performance of organic spin electronic component based on gate voltage |
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