CN202737849U - Re-sampling circuit - Google Patents
Re-sampling circuit Download PDFInfo
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- CN202737849U CN202737849U CN 201220260069 CN201220260069U CN202737849U CN 202737849 U CN202737849 U CN 202737849U CN 201220260069 CN201220260069 CN 201220260069 CN 201220260069 U CN201220260069 U CN 201220260069U CN 202737849 U CN202737849 U CN 202737849U
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- analog
- signal
- digital converter
- sampling
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Abstract
The utility model discloses a re-sampling circuit. The object of the utility model is to realize high precision and high speed in sampling simultaneously. The re-sampling circuit comprises the following components of: a signal selector used for switching between first sampling signals and second sampling signals for an input end of a processor, wherein an output end of the signal selector is connected to the input end of the processor; a first analog-digital converter used for outputting the first sampling signals to the signal selector, wherein an input end of the first analog-digital converter is coupled to an analog signal source, and an output end of the first analog-digital converter is coupled to an input end of the signal selector; and a second analog-to-digital converter used for outputting the second sampling signals to the signal selector, wherein an input end of the second analog-to-digital converter is coupled to the analog signal source, and an output end of the second analog-to-digital converter is coupled to the input end of the signal selector. The re-sampling circuit of the utility model is advantageous in that the re-sampling circuit can realize high precision and high speed in sampling simultaneously.
Description
Technical field
The utility model relates to the electroporation field, particularly a kind of sample circuit.
Background technology
At automation control and instrument field, often need the analog signal of transducer or transmitter is carried out analog-to-digital conversion, digital signal is offered processor carry out computing, analysis and storage.Yet the precision of analog to digital converter and speed can't satisfy simultaneously, and when using high-precision analog to digital converter to sample, its sampling rate can be lower; When improving the sampling rate of analog to digital converter, then need to reduce the precision of analog to digital converter.
In existing technical scheme, for the occasion that need to carry out to analog signal fast processing, in order to obtain higher sampling rate, the precision of its analog to digital converter only has 8-10bit; And in the occasion that needs high-acruracy survey and demonstration, the speed of analog to digital converter often is lower than 10K/S.
The utility model content
The technical problems to be solved in the utility model is the sampling precision of analog to digital converter and the problem that speed can't satisfy simultaneously.
To achieve these goals, the utility model provides a kind of resampling circuit, comprising: for the signal selector that the input with processor switches between the first sampled signal and the second sampled signal, output is couple to the input of processor; Be used for exporting to described signal selector the first analog to digital converter of described the first sampled signal, its input is couple to the input that simulation signal generator, output are couple to described signal selector; Be used for exporting to described signal selector the second analog to digital converter of described the second sampled signal, its input is couple to the input that simulation signal generator, output are couple to described signal selector.
Alternatively, described signal selector also comprises: be used for comparator that described the first sampled signal is compared with reference signal, and the commutation circuit of the input of described processor being switched between described the first sampled signal and described the second sampled signal according to the output signal of comparator.
Alternatively, described the first analog to digital converter is the analog to digital converter of two-forty, low precision.
Alternatively, the sampling precision of described the first analog to digital converter is the 8-10 bit, and sampling rate is 1M/S.
Alternatively, described the second analog to digital converter analog to digital converter that is high accuracy, low rate.
Alternatively, the sampling precision of described the second analog to digital converter is 16 bits, and sampling rate is 10K/S.
The beneficial effects of the utility model are requirements that resampling circuit has satisfied sampling high accuracy and two-forty simultaneously.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit block diagram of resampling circuit of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the circuit block diagram of resampling circuit of the present utility model.
As shown in Figure 1, the analog signal sampling of 20 pairs of simulation signal generators of resampling circuit, 10 outputs becomes digital signal to be sent to processor 30 analog signal conversion and carries out computing, analysis and storage.
Resampling circuit 20 comprises the first analog to digital converter 201, the second analog to digital converter 202 and signal selector 203.
The input of the first analog to digital converter 201 is couple to simulation signal generator 10, is that the first sampled signal of digital form is sent to signal selector 203 with the analog signal conversion of sampling.The first analog to digital converter 201 is the analog to digital converter of low precision, two-forty, the status signal of sampled analogue signals source 10 outputs, because the amount of information of status signal is few, the first analog to digital converter 201 can satisfy the requirement to sampling precision.For example the sampling precision of the first analog to digital converter 201 is the 8-10 bit, and sampling rate is 1M/S, and the status signal in sampled analogue signals source 10 is exported the first sampled signal, and processor 30 is met an urgent need accordingly according to the first sampled signal or protected operation.
The input of the second analog to digital converter 202 is couple to simulation signal generator 10, is that the second sampled signal of digital form is sent to signal selector 203 with the analog signal conversion of sampling.The second analog to digital converter 202 is the analog to digital converter of high accuracy, low rate, and the working signal of sampled analogue signals source 10 outputs is because containing much information of working signal needs the second analog to digital converter 202 to have high accuracy.For example the sampling precision of the second analog to digital converter 202 is 16 bits, sampling rate is 10K/S, working signal to simulation signal generator 10 is sampled, and exports the second sampled signal, and processor 30 carries out the operations such as high-precision demonstration, calculating, record, analysis according to the second sampled signal.
Two inputs of signal selector 203 are couple to respectively the output of the first analog to digital converter 201 and the second analog to digital converter 202, output is couple to the input of processor 30, is used for the input of processor 30 is switched between the first sampled signal and the second sampled signal.Particularly, signal selector 203 comprises comparator and commutation circuit (not shown in figure 1), comparator is compared the first sampled signal with reference signal, detect the first sampled signal and whether comprise fault-signal, if the first sampled signal comprises fault-signal, commutation circuit switches to the first sampled signal according to the output signal of comparator the input of processor 30, and processor 30 is met an urgent need according to the first sampled signal or protected operation; If the first sampled signal is normal status signal, commutation circuit switches to the second sampled signal according to the output signal of comparator the input of processor 30, and processor 30 carries out the operations such as high-precision demonstration, calculating, record, analysis according to the second sampled signal.
Resampling circuit of the present utility model, the first analog to digital converter, the second analog to digital converter and signal selector can be discrete elements, can be integrated circuits also, perhaps signal selector is integral to the processor together.
The two-way analog to digital converter of resampling circuit of the present utility model is sampled simultaneously to simulation signal generator, has realized high accuracy and the two-forty of sampling.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. a resampling circuit is characterized in that, comprising:
For the signal selector that the input with processor switches between the first sampled signal and the second sampled signal, output is couple to the input of processor;
Be used for exporting to described signal selector the first analog to digital converter of described the first sampled signal, its input is couple to the input that simulation signal generator, output are couple to described signal selector;
Be used for exporting to described signal selector the second analog to digital converter of described the second sampled signal, its input is couple to the input that simulation signal generator, output are couple to described signal selector.
2. resampling circuit as claimed in claim 1 is characterized in that, described signal selector also comprises:
Be used for comparator that described the first sampled signal is compared with reference signal, and the commutation circuit of the input of described processor being switched between described the first sampled signal and described the second sampled signal according to the output signal of comparator.
3. resampling circuit as claimed in claim 2 is characterized in that, described the first analog to digital converter is the analog to digital converter of two-forty, low precision.
4. resampling circuit as claimed in claim 3 is characterized in that, the sampling precision of described the first analog to digital converter is the 8-10 bit, and sampling rate is 1M/S.
5. such as claim 3 or 4 described resampling circuits, it is characterized in that, described the second analog to digital converter is the analog to digital converter of high accuracy, low rate.
6. resampling circuit as claimed in claim 5 is characterized in that, the sampling precision of described the second analog to digital converter is 16 bits, and sampling rate is 10K/S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220260069 CN202737849U (en) | 2012-06-05 | 2012-06-05 | Re-sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220260069 CN202737849U (en) | 2012-06-05 | 2012-06-05 | Re-sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202737849U true CN202737849U (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220260069 Expired - Fee Related CN202737849U (en) | 2012-06-05 | 2012-06-05 | Re-sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202737849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126670A (en) * | 2021-03-31 | 2021-07-16 | 武汉益邦汽车技术有限公司 | Control method and system for LPG vaporizing device |
-
2012
- 2012-06-05 CN CN 201220260069 patent/CN202737849U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126670A (en) * | 2021-03-31 | 2021-07-16 | 武汉益邦汽车技术有限公司 | Control method and system for LPG vaporizing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20140605 |