CN106888019A - A kind of effective position detecting systems of ADC - Google Patents
A kind of effective position detecting systems of ADC Download PDFInfo
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- CN106888019A CN106888019A CN201510936902.0A CN201510936902A CN106888019A CN 106888019 A CN106888019 A CN 106888019A CN 201510936902 A CN201510936902 A CN 201510936902A CN 106888019 A CN106888019 A CN 106888019A
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- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
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- Geophysics And Detection Of Objects (AREA)
Abstract
The invention belongs to signal detection field, and in particular to a kind of effective position detecting systems of ADC, including signal source, ADC module to be measured, ADC significance bits detection module, significance bit display module；Signal source is connected by ADC modules to be measured with ADC significance bit detection modules；ADC significance bit detection modules have been also respectively connected with signal source and significance bit display module；ADC significance bits detection module includes amplitude controller, adc data memory module and ADC significance bit computing modules；The input of adc data memory module is connected with ADC modules to be measured, and output end is connected with the input of ADC significance bit computing modules；The output end of ADC significance bit computing modules connects the input of significance bit display module；Amplitude controller is connected with signal source；The present invention is integrated with all test environments of AD significance bits measurement, and integrated level is high, and measurement is accurate, and low cost meets the demand of different user, convenient use.
Description
Technical field
The invention belongs to signal detection field, and in particular to a kind of effective position detecting systems of ADC.
Background technology
With extensive use of the ADC analog-digital converters in software radio, the performance parameter of ADC analog-digital converters also becomes more and more important.And the performance indications for evaluating ADC analog-digital converters mainly have A/D to change digit, SFDR (SFDR), signal to noise ratio (SNR), switching rate and quantization sensitivity etc..In general, the conversion digit of ADC is more, and its dynamic range is higher.But due to ADC quantizing noises in itself, and the noise harmonic brought by its differential nonlinearity and integral non-linear error, sampling clock the shake noise, the thermal noise of system, the noise that crosstalk brings between signal in printed circuit board (PCB) that introduce etc., the actual converted digit of ADC has difference with preferably conversion digit.It is thus determined that the actually active position of ADC is just aobvious extremely important to exact evaluation systematic function.
Conventional ADC detections at present are the sine waves that certain frequency is produced using excellent signal source, by after the bandpass filter of certain frequency, being connected in ADC system, are asked for by the SFDR to sampled signal, are asked for finally by SFDR/6.02.But requirement of this method to hardware device is very high, thus it is difficult to realize.
The content of the invention
The purpose of the present invention is the disadvantages mentioned above for overcoming prior art, a kind of effective position detecting systems of ADC are provided, wherein significance bit detection module produces the different signal of amplitude twice by amplitude controller control signal source, the result that ADC twice samples is stored afterwards, the SNR that data to storing carry out ADC is calculated, significance bit calculating then is carried out, finally includes on LCD display result.
To achieve these goals, the technical solution adopted in the present invention is：A kind of effective position detecting systems of ADC, including signal source, ADC module to be measured, ADC significance bits detection module, significance bit display module；The signal source is connected by ADC modules to be measured with ADC significance bit detection modules；The ADC significance bits detection module has been also respectively connected with signal source and significance bit display module；The ADC significance bits detection module includes amplitude controller, adc data memory module and ADC significance bit computing modules；The input of the adc data memory module is connected with ADC modules to be measured, and output end is connected with the input of ADC significance bit computing modules；The output end of the ADC significance bits computing module connects the input of significance bit display module；The amplitude controller is connected with signal source.
A kind of above-mentioned effective position detecting systems of ADC, the significance bit display module uses LCD liquid crystal display screen.
A kind of above-mentioned effective position detecting systems of ADC, the ADC significance bits detection module produces the different signal of amplitude twice by amplitude controller control signal source, and amplitude difference is more than 8.
A kind of above-mentioned effective position detecting systems of ADC, need to carry out in the ADC significance bits computing module twice SNR calculate, twice measure in signal source output amplitude phase difference signal will more than 20, it is to avoid the randomness of noise, cause the inaccurate of measurement result, i.e. m2/m1> 20.
Beneficial effects of the present invention：The present invention is integrated with all test environments of AD significance bits measurement, and integrated level is high, and measurement is accurate, and low cost meets the demand of different user, is widely used, and is user-friendly to.
Brief description of the drawings
The present invention is specifically described below by accompanying drawing and in conjunction with the embodiments, advantages of the present invention and implementation will be more obvious, and wherein content is only used for explanation of the present invention shown in accompanying drawing, without constituting to the limitation gone up in all senses of the invention.
Fig. 1 is a kind of structural representation of the effective position detecting systems of ADC of the invention；
Description of reference numerals：1st, signal source；2nd, ADC modules to be measured；3rd, ADC significance bits detection module；4th, significance bit display module；5th, amplitude controller；6th, adc data memory module；7th, ADC significance bits computing module.
Specific embodiment
Embodiments of the invention are elaborated below：The present embodiment is implemented under premised on technical solution of the present invention, gives detailed implementation method and specific operating process.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some variations and modifications, these belong to the scope of the present invention.
As shown in figure 1, a kind of effective position detecting systems of ADC, including signal source 1, ADC module 2 to be measured, ADC significance bits detection module 3, significance bit display module 4；The signal source 1 is connected by ADC modules 2 to be measured with ADC significance bits detection module 3；The ADC significance bits detection module 3 has been also respectively connected with signal source 1 and significance bit display module 4；The ADC significance bits detection module 3 includes amplitude controller 5, adc data memory module 6 and ADC significance bits computing module 7；The input of the adc data memory module 6 is connected with ADC modules 2 to be measured, and output end is connected with the input of ADC significance bits computing module 7；The input of the output end connection significance bit display module 4 of the ADC significance bits computing module 7；The amplitude controller 5 is connected with signal source 1.
Further, the ADC significance bits detection module 3 produces the different signal of amplitude twice by the control signal source 1 of amplitude controller 5, and amplitude difference is more than 8.
Further, need to carry out SNR twice in the ADC significance bits computing module 7 to calculate, the output amplitude phase difference signal of signal source 1 will be more than 20 in measuring twice, it is to avoid the randomness of noise, cause the inaccurate of measurement result, i.e. m2/m1> 20.
Operation principle of the invention：
ADC significance bits detection module is mainly made up of three parts：Normal signal source, ADC significance bits computing module, significance bit display module.
Significance bit detection module produces the different signal of amplitude twice by amplitude controller control signal source, amplitude difference is more than 8, the result that ADC twice samples is stored, the SNR that data to storing carry out ADC is calculated, significance bit calculating then is carried out, finally includes on LCD display result.
The above is preferred exemplary applications of the invention, not limitation of the present invention, and every simple modification made according to technical key point, structure change change are belonged within protection scope of the present invention.
Claims (4)
1. a kind of effective position detecting systems of ADC, including signal source（1）, ADC modules to be measured（2）, ADC significance bit detection modules（3）, significance bit display module（4）；The signal source（1）By ADC modules to be measured（2）With ADC significance bit detection modules（3）It is connected；The ADC significance bits detection module（3）It has been also respectively connected with signal source（1）With significance bit display module（4）；It is characterized in that：The ADC significance bits detection module（3）Including amplitude controller（5）, adc data memory module（6）With ADC significance bit computing modules（7）；The adc data memory module（6）Input and ADC modules to be measured（2）Connection, output end and ADC significance bit computing modules（7）Input connection；The ADC significance bits computing module（7）Output end connection significance bit display module（4）Input；The amplitude controller（5）With signal source（1）It is connected.
2. effective position detecting systems of a kind of ADC according to claim 1, it is characterised in that：The ADC significance bits detection module（3）By amplitude controller（5）Control signal source（1）The different signal of amplitude twice is produced, amplitude difference is more than 8.
3. effective position detecting systems of a kind of ADC according to claim 1, it is characterised in that：The ADC significance bits computing module（7）In need to carry out twice SNR calculate, twice measure in signal source（1）Output amplitude phase difference signal will be more than 20.
4. effective position detecting systems of a kind of ADC according to claim 1, it is characterised in that：The significance bit display module（4）Using LCD display.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510936902.0A CN106888019A (en) | 2015-12-15 | 2015-12-15 | A kind of effective position detecting systems of ADC |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510936902.0A CN106888019A (en) | 2015-12-15 | 2015-12-15 | A kind of effective position detecting systems of ADC |
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| CN106888019A true CN106888019A (en) | 2017-06-23 |
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| CN201510936902.0A Pending CN106888019A (en) | 2015-12-15 | 2015-12-15 | A kind of effective position detecting systems of ADC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968701A (en) * | 2021-01-28 | 2021-06-15 | 中国电子科技集团公司第五十八研究所 | Dynamic test system for ADC integral nonlinearity and differential nonlinearity |
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| US8816886B1 (en) * | 2013-03-15 | 2014-08-26 | Pmc-Sierra Us, Inc. | Method and apparatus to control the effective gain of a statistically calibrated analog to digital converter |
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| US7129879B1 (en) * | 2005-07-12 | 2006-10-31 | Analog Devices, Inc. | Method of and apparatus for characterizing an analog to digital converter |
| US20130015987A1 (en) * | 2011-07-15 | 2013-01-17 | Ayman Shabra | Mimo delta-sigma delta analog-to-digital converter using noise canceling |
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| US8816886B1 (en) * | 2013-03-15 | 2014-08-26 | Pmc-Sierra Us, Inc. | Method and apparatus to control the effective gain of a statistically calibrated analog to digital converter |
| CN103475369A (en) * | 2013-07-04 | 2013-12-25 | 东南大学 | High-precision ADC test method based on signal-source-error one-time correction and identification |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968701A (en) * | 2021-01-28 | 2021-06-15 | 中国电子科技集团公司第五十八研究所 | Dynamic test system for ADC integral nonlinearity and differential nonlinearity |
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