CN207198708U - A kind of voltage-reference with noise suppressed - Google Patents
A kind of voltage-reference with noise suppressed Download PDFInfo
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- CN207198708U CN207198708U CN201721114822.8U CN201721114822U CN207198708U CN 207198708 U CN207198708 U CN 207198708U CN 201721114822 U CN201721114822 U CN 201721114822U CN 207198708 U CN207198708 U CN 207198708U
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Abstract
The utility model provides a kind of voltage-reference with noise suppressed, including：N voltage-reference, adder and output unit；N voltage-reference is designated as first voltage a reference source, the voltage-reference of second voltage a reference source ... ... n-th successively；The adder has n input, an output end, and n input of the adder is connected to the output end of n voltage-reference, the output end connection output unit of the adder one by one respectively；The adder is used for the voltage summation for completing n voltage-reference, and the output unit is used for output signal-to-noise ratio after carrying out partial pressure and filtering to the voltage after summation and improvedReference voltage again.The utility model employs multiple a reference sources and is combined, and voltage-reference is obtained higher relative stability by suppressing noise, improving the modes such as signal to noise ratio.
Description
Technical field
The utility model belongs to high precision reference source technology field, more particularly, to a kind of electricity with noise suppressed
Press a reference source.
Background technology
High-precision voltage reference source is that the important component of Analogous Integrated Electronic Circuits, usually ADC or DAC module provide one
Individual high-precision reference voltage, and reference is provided for other circuits for needing low noise benchmark to input, its precision level is direct
It is related to the degree of accuracy and the stability of the circuit such as ADC and DAC measurement modules.Desired voltage a reference source should have perfect essence
Degree, and change in factors such as load, temperature and ensure that voltage is constant；And in practical application, it is necessary in precision, voltage drift, band
Consideration is traded off in the indexs such as load capacity, long-time stability and cost.
The temperature coefficient of existing voltage-reference is typically 5ppm/ DEG C of magnitude, and voltage noise is about in μ V magnitudes, and low frequency
The relative stability of section is poor.Such as require that the relative fluctuation of voltage-reference exists in LISA spatial attraction survey plans
Meet 10 in 0.1mHz-0.1Hz bandwidth-6/Hz1/2, this proposes strict requirements to high-precision voltage reference source.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of electricity with noise suppressed
A reference source is pressed, its object is to further improve the signal to noise ratio of existing voltage-reference, is derived from the electricity of more Larger Dynamic scope
A reference source is pressed to meet the needs of high-acruracy survey.
The utility model provides a kind of voltage-reference with noise suppressed, including：N voltage-reference, addition
Device and output unit；N voltage-reference is designated as first voltage a reference source, second voltage a reference source ... ... the n-th voltage base successively
Quasi- source；The adder has n input, an output end, and n input of the adder is connected to n one by one respectively
The output end of individual voltage-reference, the output end connection output unit of the adder；The adder is used to complete n voltage
The voltage summation of a reference source, the output unit are used for output signal-to-noise ratio after carrying out partial pressure and filtering to the voltage after summation and improvedReference voltage again.
The utility model additionally provides a kind of voltage-reference with noise suppressed, including：N voltage-reference and point
Press filter unit；N voltage-reference is designated as first voltage a reference source, the voltage reference of second voltage a reference source ... ... n-th successively
Source；Each voltage-reference has two output ends, the first output end and the first voltage a reference source of second voltage a reference source
Second output end connects, and the first output end of tertiary voltage a reference source connects with the second output end of second voltage a reference source
Connect ... ... the first output end of the n-th voltage-reference to be connected with the second output end of the (n-1)th voltage-reference, divider filter list
The first input end of member is connected to the first output end of first voltage a reference source, and the second input of divider filter unit is connected to
Second output end of the n-th voltage-reference；N voltage-reference is sequentially connected in series superimposed voltage, and the divider filter unit is to folded
Voltage after adding carries out output reference voltage after partial pressure and filtering.
Further, divider filter unit includes：The division module and filtration module being sequentially connected.
Further, division module includes the resistance R1 and resistance R2 being sequentially connected in series；The filtration module includes
The resistance R3 and electric capacity C1, one end that the resistance R3 and electric capacity C1 are connected in parallel being connected in parallel are connected to the resistance R1 and institute
The resistance R2 end that is connected in series is stated, the other end ground connection that the resistance R3 and electric capacity C1 are connected in parallel.
In general, by the contemplated above technical scheme of the utility model compared with prior art, as a result of
Multiple a reference sources are combined, and by suppressing noise, improving the mode such as signal to noise ratio, to obtain voltage-reference higher relatively steady
It is qualitative.
Brief description of the drawings
Fig. 1 is the source model structural representation of high precision reference altogether provided by the utility model.
Fig. 2 is high precision reference source model structural representation in floating ground provided by the utility model.
Fig. 3 is the circuit theory diagrams of divider filter unit in high precision reference source model in floating ground provided by the utility model.
In all of the figs, identical reference is used for representing identical element or structure, wherein：11 be first voltage
A reference source, 12 be that second voltage a reference source ... ... 1n is the n-th voltage-reference, and 2 be adder, and 3 be output unit, and 4 be partial pressure
Filter unit, 41 be division module, and 42 be filtration module.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not form conflict each other, can is mutually combined.
In the utility model, in order to reduce to temperature control system demand parameter, it is proposed that a kind of new a reference source design
Scheme, its temperature coefficient is reduced into about magnitude, reduces the requirement to ambient temperature fluctuation.The utility model belongs to high
Precision reference source design field, the device that a kind of voltage reference suppresses noise is more particularly to, is applicable the design of high stable a reference source
With making, and the reference of the input-output unit 3 such as high-precision adc and high-precision DAC.
The purpose of this utility model is to combine to build a new voltage base by multiple different types of voltage-references
Quasi- source, for reducing the noise level of voltage-reference, its basic thought is added or is superimposed using n a reference source, root
According to Noise Theory, its theoretical signal to noise ratio improves relative to original voltage-referenceTimes, specific implementation has to be added altogether
Mode and floating ground stacked system.
Voltage-reference provided by the utility model can use two kinds of implementations, and the first implementation is using altogether
High precision reference source model, as shown in figure 1, including：N voltage-reference, adder 2 and output unit 3, wherein, n voltage
A reference source is designated as first voltage a reference source 11, the n-th voltage-reference of second voltage a reference source 12 ... ... 1n successively；Adder 2 has
There are n input, an output end, n input of adder is connected to the output end of n voltage-reference one by one respectively,
The output end connection output unit 3 of adder 2；Adder 2 is used for the voltage summation for completing n voltage-reference, output unit 3
Partial pressure and filter function are provided, for completing last reference voltage output, now improved on its signal-to-noise theoryTimes.
In the utility model, the structure of n voltage-reference is similar, can specifically use the electricity of AD or MAX companies
Press a reference source.
Adder 2 can select low-noise accurate instrument amplifier.
Second of implementation uses floating ground high precision reference source model, as shown in Fig. 2 including：N voltage-reference and
Divider filter unit 4, wherein each voltage-reference has two output ends, the first output end of second voltage a reference source 12 with
The second output end connection of first voltage a reference source 11, the first output end and the second voltage a reference source of tertiary voltage a reference source 13
12 the second output end connection ... ... the first output end of the n-th voltage-reference and the second output end of the (n-1)th voltage-reference
Connection, the first input end of divider filter unit 4 are connected to the first output end of first voltage a reference source 11, divider filter unit
4 the second input is connected to the n-th voltage-reference 1n the second output end.
N voltage-reference is sequentially connected in series superimposed voltage, and divider filter unit 4 is used to provide partial pressure and filter function, used
Exported in completing last reference voltage.
In the utility model, divider filter unit 4 forms including division module 41 with filtration module 42, wherein partial pressure mould
Block 41 is made up of the resistor network R1 and R2 of low-temperature coefficient, and filtration module 42 is by low-temperature coefficient resistor network R3 and low temperature
The electric capacity C1 compositions of coefficient.
The utility model mainly provides a kind of voltage-reference with noise suppressed, for ADC or DAC and other
The circuit for needing low noise benchmark to input provides reference.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
To limit the utility model, any modification of all made within spirit of the present utility model and principle, equivalent substitution and change
Enter, should be included within the scope of protection of the utility model.
Claims (4)
- A kind of 1. voltage-reference with noise suppressed, it is characterised in that including：N voltage-reference, adder (2) and Output unit (3)；N voltage-reference is designated as first voltage a reference source (11), the voltage base of second voltage a reference source (12) ... ... n-th successively Quasi- source (1n)；The adder (2) has n input, and an output end, the n input difference of the adder is one by one It is connected to the output end of n voltage-reference, the output end connection output unit (3) of the adder (2)；The adder (2) it is used for the voltage summation for completing n voltage-reference, the output unit (3) is used to carry out partial pressure to the voltage after summation Improved with output signal-to-noise ratio after filteringReference voltage again.
- 2. voltage-reference as claimed in claim 1, it is characterised in that the divider filter unit (4) includes：It is sequentially connected Division module (41) and filtration module (42).
- A kind of 3. voltage-reference with noise suppressed, it is characterised in that including：N voltage-reference and divider filter list First (4)；N voltage-reference is designated as first voltage a reference source (11), the voltage base of second voltage a reference source (12) ... ... n-th successively Quasi- source (1n)；Each voltage-reference has two output ends, the first output end of second voltage a reference source (12) and the first electricity Press the second output end connection of a reference source (11), the first output end and the second voltage a reference source of tertiary voltage a reference source (13) (12) the second output end connection ... ... the first output end of the n-th voltage-reference (1n) and the second of the (n-1)th voltage-reference Output end connects, and the first input end of divider filter unit (4) is connected to the first output end of first voltage a reference source (11), point Second input of pressure filter unit (4) is connected to the second output end of the n-th voltage-reference (1n)；N voltage-reference is sequentially connected in series superimposed voltage, the divider filter unit (4) voltage after superposition is carried out partial pressure and Output reference voltage after filtering.
- 4. voltage-reference as claimed in claim 3, it is characterised in that the division module (41) includes being sequentially connected in series Resistance R1 and resistance R2；The filtration module (42) includes the resistance R3 and electric capacity C1, the resistance R3 and electricity being connected in parallel Hold the end that is connected in series that one end that C1 is connected in parallel is connected to the resistance R1 and resistance R2, the resistance R3 and electric capacity C1 The other end ground connection being connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721114822.8U CN207198708U (en) | 2017-08-31 | 2017-08-31 | A kind of voltage-reference with noise suppressed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721114822.8U CN207198708U (en) | 2017-08-31 | 2017-08-31 | A kind of voltage-reference with noise suppressed |
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| Publication Number | Publication Date |
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| CN207198708U true CN207198708U (en) | 2018-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739937A (en) * | 2019-10-22 | 2020-01-31 | 华中科技大学 | switch type square wave generator using parallel reference voltage source |
| CN111307026A (en) * | 2019-11-11 | 2020-06-19 | 华中科技大学 | Charge-discharge type capacitive sensor based on diode switch |
| CN112947659A (en) * | 2021-02-22 | 2021-06-11 | 北京迪浩永辉技术有限公司 | Band-gap voltage reference circuit applied to 1/f noise of MEMS (micro-electromechanical systems) inertial device |
-
2017
- 2017-08-31 CN CN201721114822.8U patent/CN207198708U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739937A (en) * | 2019-10-22 | 2020-01-31 | 华中科技大学 | switch type square wave generator using parallel reference voltage source |
| CN111307026A (en) * | 2019-11-11 | 2020-06-19 | 华中科技大学 | Charge-discharge type capacitive sensor based on diode switch |
| CN112947659A (en) * | 2021-02-22 | 2021-06-11 | 北京迪浩永辉技术有限公司 | Band-gap voltage reference circuit applied to 1/f noise of MEMS (micro-electromechanical systems) inertial device |
| CN112947659B (en) * | 2021-02-22 | 2022-04-12 | 北京迪浩永辉技术有限公司 | Band-gap voltage reference circuit applied to 1/f noise of MEMS (micro-electromechanical systems) inertial device |
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