CN102608403A - Error detection method and system of reference voltage - Google Patents
Error detection method and system of reference voltage Download PDFInfo
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- CN102608403A CN102608403A CN2012100474920A CN201210047492A CN102608403A CN 102608403 A CN102608403 A CN 102608403A CN 2012100474920 A CN2012100474920 A CN 2012100474920A CN 201210047492 A CN201210047492 A CN 201210047492A CN 102608403 A CN102608403 A CN 102608403A
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Abstract
The embodiment of the invention discloses an error detection method of a reference voltage, which comprises the steps of: dividing a first reference voltage provided by a first reference voltage source into a first voltage according to a preset voltage dividing coefficient; and detecting an error of the first voltage, figuring out an error of the first reference voltage according to a formula that the error of the first reference voltage is equal to the product obtained by multiplying the error of the first voltage by the 1/voltage dividing coefficient. The embodiment of the invention also discloses an error detection system of the reference voltage. By adopting the invention, through detecting the error of the reference voltage, the accuracy of simulating signal acquisition or voltage comparison can be improved.
Description
Technical field
The present invention relates to circuit design field, relate in particular to a kind of error detection method and system of reference voltage.
Background technology
Circuit such as collection of simulant signal circuit in the circuit design or voltage comparator circuit; All need a reference voltage as signals collecting or voltage ratio reference voltage, this reference voltage can be provided by reference voltage sources such as HF switch voltage source or linear voltage sources.
The inventor finds in practical application; There is the not high problem of precision in used reference voltage source in collection of simulant signal or the voltage comparator circuit; The theoretical principle voltage of the reference voltage source of for example selecting for use is 3V, and actual reference voltage possibly only have 2.7V in it is used; Because there is the not high problem of precision in the reference voltage that reference voltage source provides, will cause in collection of simulant signal or voltage ratio process, occurring gathering mistake or comparison error.
Summary of the invention
Embodiment of the invention technical matters to be solved is, a kind of error detection method and system of reference voltage is provided, and through the error of detection reference voltage, can improve collection of simulant signal or voltage ratio accuracy.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of error detection method of reference voltage, comprising:
Dividing potential drop coefficient according to predetermined is first voltage with the first reference voltage dividing potential drop that first reference voltage source provides;
Detect the error of said first voltage, and according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage
Correspondingly, the embodiment of the invention also provides a kind of error detecting system of reference voltage, comprising:
Bleeder circuit, being used for according to predetermined dividing potential drop coefficient is first voltage with the first reference voltage dividing potential drop that first reference voltage source provides;
Treating apparatus is used to detect the error of said first voltage, and according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage.
Embodiment of the present invention embodiment has following beneficial effect:
The embodiment of the invention is through being first voltage according to predetermined dividing potential drop coefficient with the first reference voltage dividing potential drop; And the error of first voltage detected; And according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage; Because the embodiment of the invention is through the error-detecting to first voltage; And then detect the error of first reference voltage; Therefore can collection of simulant signal or voltage ratio than the time; Can be by the collection result or the voltage ratio comparative result of the error correction simulating signal of first reference voltage, thus the collection accuracy or the voltage ratio accuracy of simulating signal improved.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of embodiment of the error detecting system of reference voltage of the present invention;
Fig. 2 is the schematic flow sheet of embodiment of the error detection method of reference voltage of the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Please refer to Fig. 1, is the structural representation of embodiment of the error detecting system of reference voltage of the present invention, and this error detecting system mainly comprises: bleeder circuit 1 and treating apparatus 2.
Wherein to be mainly used in according to predetermined dividing potential drop coefficient be first voltage with the first reference voltage dividing potential drop that first reference voltage source provides to bleeder circuit 1.
Particularly, can first reference voltage that first reference voltage source provides be loaded on the input end of bleeder circuit 1, bleeder circuit 1 is first voltage according to predetermined dividing potential drop coefficient with the first reference voltage step-down, and output.As shown in Figure 1, in one embodiment, bleeder circuit 1 comprises: first resistance unit 11 and second resistance unit 12; First resistance unit 11 and 12 series connection of second resistance unit, promptly an end of first resistance unit 11 is connected to first reference voltage source as the input end of bleeder circuit 1, is used to receive first reference voltage that first reference voltage source provides; The other end of second resistance unit 11 is connected to an end of second resistance unit 12, and the other end of second resistance unit 12 is connected to ground; The output terminal that first resistance unit 11 and second resistance unit, 12 interconnective ends are bleeder circuit 1 is used to export first voltage.Need to prove; Predetermined dividing potential drop coefficient is confirmed by the resistance of first resistance unit 11 and second resistance unit 12; The resistance of supposing first resistance unit 11 is R1; The resistance of second resistance unit is R2, and then predetermined dividing potential drop coefficient is R2/ (R1+R2), first voltage=reference voltage * R2/ (R1+R2).Also need to prove; First resistance unit 11 and second resistance unit 12 all can be made up of mutual series, parallel of one or more resistance or SP; In order to improve the precision of voltage transitions, the error rate of the resistance of first resistance unit 11 and second resistance unit 12 can be controlled at about 0.1% simultaneously.
Wherein treating apparatus 2 is mainly used in the error that detects said first voltage, and according to the said dividing potential drop coefficient of the sum of errors of said first voltage, calculates said first reference voltage.
Particularly, treating apparatus 2 can comprise: first analog to digital converter 21, processor 24, second reference voltage source 26, second analog to digital converter 25, the 3rd reference voltage source 22 and the 3rd analog to digital converter 23.
The two ends of first analog to digital converter 21 are connected to the output terminal and the processor 24 of bleeder circuit 1 respectively, are used for first voltage is carried out analog to digital conversion, obtain first digital voltage, and export first digital voltage to processor 24.
The two ends of second analog to digital converter 25 are connected to second reference voltage source 26 and processor 24 respectively; Be used for second reference voltage that second reference voltage source 26 provides is carried out analog to digital conversion; Obtain the second numerical reference voltage, and export the second numerical reference voltage to processor 24.Need to prove that second reference voltage source 26 is high-precision reference voltage source, its precision is higher than first reference voltage source that first reference voltage is provided; Can to adopt precision be that 99.9% reference voltage source is realized to second reference voltage source 26 particularly.Need to prove that also the theoretical principle voltage of supposing first reference voltage source is second voltage through the voltage that predetermined dividing potential drop relation converts to, i.e. second voltage=theoretical principle voltage * R2/ (R1+R2), second reference voltage is less than second voltage so.
The two ends of the 3rd analog to digital converter 23 are connected to the 3rd reference voltage source 22 and processor 24 respectively; Be used for the 3rd reference voltage that the 3rd reference voltage source 22 provides is carried out analog to digital conversion; Obtain the 3rd numerical reference voltage, and export the 3rd numerical reference voltage to processor 24.Need to prove that the 3rd reference voltage source 22 is high-precision reference voltage source, its precision is higher than first reference voltage source that first reference voltage is provided; Can to adopt precision be 99.9% reference voltage source to the 3rd reference voltage source particularly.Need to prove that also the 3rd reference voltage is greater than second voltage.
Said processor 24 also is used for first digital voltage and digital reference voltage are compared, and detecting the error of first voltage, and according to the said dividing potential drop coefficient of the sum of errors of first voltage, calculates the error of first reference voltage.Particularly, processor 24 can obtain the error of first digital voltage through analyzing first digital voltage and digital reference voltage, then the error of first digital voltage is become the error of face first voltage by analog to digital conversion; Can oppositely extrapolate the error of first reference voltage according to the predetermined dividing potential drop coefficient of the sum of errors of first voltage, for example: the error of first voltage is Δ V, and predetermined dividing potential drop coefficient is R2/ (R1+R2), so the error of first reference voltage=Δ V* (1+R1/R2).
Present embodiment is through detecting the error of first voltage; And then calculate the error of first reference voltage; Thereby when this reference voltage during as reference voltage of simulating signal or voltage ratio, because the error of known reference voltage, can be in collection of simulant signal or the voltage ratio software processes process after; Revise the value of reference voltage, to improve the accuracy of final collection of simulant signal or voltage comparative result.
Please refer to Fig. 2, is the schematic flow sheet of second embodiment of the error detection method of reference voltage of the present invention, and said method comprises:
Step S11 is first voltage according to predetermined dividing potential drop coefficient with the first reference voltage dividing potential drop that first reference voltage source provides.
Wherein, step S11 can be realized by the bleeder circuit among Fig. 11, not give unnecessary details at this.
Step S12 detects the error of said first voltage, and according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage.
Wherein, step S12 comprises particularly:
A, said first voltage is carried out analog to digital conversion, obtain first digital voltage.
B, second reference voltage that second reference voltage source is provided carry out analog to digital conversion; Obtain the second numerical reference voltage; Said second reference voltage is less than said second voltage, and the precision of said second reference voltage source is greater than the precision of said first reference voltage source.
C, the 3rd reference voltage that the 3rd reference voltage source is provided carry out analog to digital conversion; Obtain the 3rd numerical reference voltage; Said the 3rd reference voltage is greater than said second voltage, and the precision of said the 3rd reference voltage source is greater than the precision of said first reference voltage source;
D, by the synthetic said digital reference voltage of the said second numerical reference voltage and the 3rd numerical reference voltage, the size of said digital reference voltage is between said second numerical reference voltage and the 3rd numerical reference voltage.
E, said first digital voltage and digital reference voltage are compared; Obtain the error of said first digital voltage; After said digital reference voltage equals according to said dividing potential drop coefficient the theoretical principle voltage dividing potential drop of said first reference voltage source to be second voltage, said second voltage carried out second digital voltage that obtains after the analog to digital conversion;
F, the error of said first digital voltage is carried out analog to digital conversion, obtain the error of said first voltage, and according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage.
Particularly, the said process of step S12 can be realized by the treating apparatus among Fig. 12, not give unnecessary details at this.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through computer program; Described program can be stored in the computer read/write memory medium; This program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above disclosedly be merely preferred embodiment of the present invention; Certainly can not limit the present invention's interest field with this; One of ordinary skill in the art will appreciate that all or part of flow process that realizes the foregoing description; And, still belong to the scope that invention is contained according to the equivalent variations that claim of the present invention is done.
Claims (6)
1. the error detection method of a reference voltage is characterized in that, comprising:
Dividing potential drop coefficient according to predetermined is first voltage with the first reference voltage dividing potential drop that first reference voltage source provides;
Detect the error of said first voltage, and according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage.
2. the method for claim 1 is characterized in that, the operation of the error of said first voltage of said detection comprises:
Said first voltage is carried out analog to digital conversion, obtain first digital voltage;
Said first digital voltage and digital reference voltage are compared; Obtain the error of said first digital voltage; After said digital reference voltage equals according to said dividing potential drop coefficient the theoretical principle voltage dividing potential drop of said first reference voltage source to be second voltage, said second voltage carried out second digital voltage that obtains after the analog to digital conversion;
Error to said first digital voltage is carried out analog to digital conversion, obtains the error of said first voltage.
3. method as claimed in claim 2 is characterized in that, the operation of the error of said first voltage of said detection also comprises:
Second reference voltage that second reference voltage source is provided carries out analog to digital conversion, obtains the second numerical reference voltage, and said second reference voltage is less than said second voltage, and the precision of said second reference voltage source is greater than the precision of said first reference voltage source;
The 3rd reference voltage that the 3rd reference voltage source is provided carries out analog to digital conversion, obtains the 3rd numerical reference voltage, and said the 3rd reference voltage is greater than said second voltage, and the precision of said the 3rd reference voltage source is greater than the precision of said first reference voltage source;
By said second numerical reference voltage and the synthetic said digital reference voltage of the 3rd numerical reference voltage, the size of said digital reference voltage is between said second numerical reference voltage and the 3rd numerical reference voltage.
4. the error detecting system of a reference voltage is characterized in that, comprising:
Bleeder circuit, being used for according to predetermined dividing potential drop coefficient is first voltage with the first reference voltage dividing potential drop that first reference voltage source provides;
Treating apparatus is used to detect the error of said first voltage, and according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage.
5. error detecting system as claimed in claim 4 is characterized in that, said treating apparatus comprises:
First analog to digital converter is used for said first voltage is carried out analog to digital conversion, obtains first digital voltage;
Processor; Be used for said first digital voltage and digital reference voltage are compared; Obtain the error of said first digital voltage, carry out second digital voltage that obtains after the analog to digital conversion after said digital reference voltage equals according to said dividing potential drop coefficient the theoretical principle voltage dividing potential drop of said first reference voltage source to be second voltage, to said second voltage;
Said processor; Also be used for the error of said first digital voltage is carried out analog to digital conversion; Obtain the error of said first voltage, and according to formula: the error * 1/ dividing potential drop coefficient of the error of first reference voltage=first voltage calculates the error of said first reference voltage
6. error detecting system as claimed in claim 5 is characterized in that, said treating apparatus also comprises:
Second analog to digital converter; Be used for second reference voltage that second reference voltage source provides is carried out analog to digital conversion; Obtain the second numerical reference voltage, said second reference voltage is less than said second voltage, and the precision of said second reference voltage source is greater than the precision of said first reference voltage source;
The 3rd analog to digital converter; Be used for the 3rd reference voltage that the 3rd reference voltage source provides is carried out analog to digital conversion; Obtain the 3rd numerical reference voltage, said the 3rd reference voltage is greater than said second voltage, and the precision of said the 3rd reference voltage source is greater than the precision of said first reference voltage source;
Said processor also is used for said second numerical reference voltage and the synthetic said digital reference voltage of the 3rd numerical reference voltage, and the size of said digital reference voltage is between said second numerical reference voltage and the 3rd numerical reference voltage.
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| CN104267249A (en) * | 2014-10-09 | 2015-01-07 | 长智光电（四川）有限公司 | Device for measuring voltage difference between LED string lights |
| CN110471482A (en) * | 2019-08-12 | 2019-11-19 | 兆讯恒达微电子技术(北京)有限公司 | A kind of voltage calibration method and calibration circuit |
| CN116185119A (en) * | 2023-04-23 | 2023-05-30 | 深圳市九天睿芯科技有限公司 | CIM-based voltage regulating circuit, chip and electronic equipment |
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| CN110231510B (en) * | 2018-03-05 | 2021-06-18 | 华润微集成电路(无锡)有限公司 | Calibration system and method for improving accuracy of reference voltage value inside chip |
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Cited By (5)
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| CN104267249A (en) * | 2014-10-09 | 2015-01-07 | 长智光电（四川）有限公司 | Device for measuring voltage difference between LED string lights |
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| CN116185119B (en) * | 2023-04-23 | 2023-07-21 | 深圳市九天睿芯科技有限公司 | CIM-based voltage regulating circuit, chip and electronic equipment |
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Effective date of registration: 20211105 Address after: 518043 No. 01, 39th floor, building a, antuoshan headquarters building, No. 33, antuoshan Sixth Road, Xiang'an community, Xiangmihu street, Futian District, Shenzhen, Guangdong Province Patentee after: Huawei Digital Energy Technology Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |