CN204180056U - The structure of multiplication is realized in digital-to-analogue conversion process - Google Patents
The structure of multiplication is realized in digital-to-analogue conversion process Download PDFInfo
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- CN204180056U CN204180056U CN201420701489.0U CN201420701489U CN204180056U CN 204180056 U CN204180056 U CN 204180056U CN 201420701489 U CN201420701489 U CN 201420701489U CN 204180056 U CN204180056 U CN 204180056U
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Abstract
A kind of structure realizing multiplication in digital-to-analogue conversion process, comprise: digital to analog converter, digital to analog converter has input interface, output interface and voltage reference source interface, the wherein input interface incoming digital signal of digital to analog converter, output interface outputting analog signal, adopt two digital to analog converters, be respectively first order digital to analog converter and second level digital to analog converter, the output interface of first order digital to analog converter is connected with the voltage reference source interface of second level digital to analog converter.The utility model has implements the features such as simple, economical and practical and with strong points, is applicable to the low frequency small-signal production process that multiplying is loaded down with trivial details, especially in the occasion of processor multiplying difficulty.
Description
Technical field
The utility model relates to the technical field of number of signals mode convertion, is a kind of structure realizing multiplication in digital-to-analogue conversion process specifically.
Background technology
All need to provide periodical small as test signal in many signal testing environment, solution most is at present all realized by digital analog converter, but need the signal of generation very complicated in a lot of situation, special processor is needed to carry out computing, account for processor resource very much, especially do not support the processor of floating-point operation, in process multiplication procedure, difficulty is very large.
In order to satisfied on-the-spot needs, often need constantly to be optimized processor software and algorithm, just function can be completed, and the part accounting for software resource is most exactly multiplying, the multiplying part in digital-to-analogue conversion process is realized being the direction that hardware designs is being made great efforts always by simple hardware technology.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of structure realizing multiplication in digital-to-analogue conversion process.
The technical scheme that the utility model is taked for the technical problem existed in solution prior art is:
The structure realizing multiplication in digital-to-analogue conversion process of the present utility model, comprise: digital to analog converter, digital to analog converter has input interface, output interface and voltage reference source interface, the wherein input interface incoming digital signal of digital to analog converter, output interface outputting analog signal, adopt two digital to analog converters, be respectively first order digital to analog converter and second level digital to analog converter, the output interface of first order digital to analog converter is connected with the voltage reference source interface of second level digital to analog converter.
The utility model can also adopt following technical measures:
Described first order digital to analog converter and second level digital to analog converter are identical digital to analog converter.
The advantage that the utility model has and good effect are:
Of the present utility modelly realize in the structure of multiplication in digital-to-analogue conversion process, adopt two digital to analog converters, be respectively first order digital to analog converter and second level digital to analog converter, the output interface of first order digital to analog converter is connected with the voltage reference source interface of second level digital to analog converter.The analog signal of the output of first order digital to analog converter is as the voltage reference source of second level digital to analog converter, the a reference source of second level digital to analog converter due to self in digital-to-analogue conversion process is controlled, so the signal produced also can change accordingly, thus present multiplication relation.The utility model has implements the features such as simple, economical and practical and with strong points, is applicable to the low frequency small-signal production process that multiplying is loaded down with trivial details, especially in the occasion of processor multiplying difficulty.
Accompanying drawing explanation
Fig. 1 is the schematic diagram realizing the structure of multiplication in digital-to-analogue conversion process of the present utility model.
Embodiment
Referring to drawings and Examples, the utility model is described in detail.
The structure realizing multiplication in digital-to-analogue conversion process of the present utility model, comprise: digital to analog converter, digital to analog converter has input interface, output interface and voltage reference source interface, the wherein input interface incoming digital signal of digital to analog converter, output interface outputting analog signal, adopt two digital to analog converters, be respectively first order digital to analog converter and second level digital to analog converter, the output interface of first order digital to analog converter is connected with the voltage reference source interface of second level digital to analog converter.
Fig. 1 is the schematic diagram realizing the structure of multiplication in digital-to-analogue conversion process of the present utility model.
As shown in Figure 1, wherein 1 in Fig. 1 is the digital signal inputted by first order digital to analog converter input interface, 2 is the digital signal inputted by second level digital to analog converter input interface, 3 is the analog signal that first order digital to analog converter output interface exports, 4 is the analog signal that second level digital to analog converter output interface exports, namely final output voltage value, 5 is first order digital to analog converter, and 6 is second level digital to analog converter.First order digital to analog converter 5 completes digital signal 1 and is converted to analog signal 3, and using the voltage reference source of analog signal 3 as second level digital to analog converter 6, second level digital to analog converter 6 realizes the transfer process that digital signal 2 is converted to analog signal 4 under this reference source, and final output presents multiplication relation.
The outputting analog signal of first order digital to analog converter will ensure as low frequency signal, in order to avoid distortion is larger in transfer process.
First order digital to analog converter and second level digital to analog converter can adopt identical digital to analog converter, and digital to analog converter is general transducer of the prior art.
In the course of work of the present utility model, the implementation procedure of digital to analog converter is with voltage reference source for scale, exports actual voltage results after the digital signal of output is multiplied by outside reference source magnitude of voltage again divided by whole digital range.Such as: the precision of a digital to analog converter is 16, and a reference source is 5V, then output voltage values formula is: output voltage values=output valve ÷ 65535 × 5; Also can change if a reference source changes corresponding output voltage values thereupon, show multiplication relation.So control by a reference source of a digital to analog converter to another digital to analog converter, change can realize multiplying.Such as: two digital to analog converters are all the precision of 16, first a reference source is 5V, second a reference source exports by first and controls, then final output voltage values formula is: output voltage values=output valve (second level) ÷ 65535 × (output valve (first order) ÷ 65535 × 5); Complete the multiplying function that number is touched in transfer process.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model with preferred embodiment openly as above, but, and be not used to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, certainly the technology contents of announcement can be utilized to make a little change or modification, become the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (2)
1. one kind realizes the structure of multiplication in digital-to-analogue conversion process, comprise: digital to analog converter, digital to analog converter has input interface, output interface and voltage reference source interface, the wherein input interface incoming digital signal of digital to analog converter, output interface outputting analog signal, it is characterized in that: adopt two digital to analog converters, be respectively first order digital to analog converter and second level digital to analog converter, the output interface of first order digital to analog converter is connected with the voltage reference source interface of second level digital to analog converter.
2. the structure realizing multiplication in digital-to-analogue conversion process according to claim 1, is characterized in that: first order digital to analog converter and second level digital to analog converter are identical digital to analog converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701489.0U CN204180056U (en) | 2014-11-20 | 2014-11-20 | The structure of multiplication is realized in digital-to-analogue conversion process |
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| CN201420701489.0U CN204180056U (en) | 2014-11-20 | 2014-11-20 | The structure of multiplication is realized in digital-to-analogue conversion process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020257964A1 (en) * | 2019-06-24 | 2020-12-30 | Jiangsu Jitri Micro-Nano Automation Institute Co., Ltd. | A digital-to-analog converter |
| CN116366066A (en) * | 2021-12-27 | 2023-06-30 | 圣邦微电子（北京）股份有限公司 | Arithmetic circuit |
-
2014
- 2014-11-20 CN CN201420701489.0U patent/CN204180056U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020257964A1 (en) * | 2019-06-24 | 2020-12-30 | Jiangsu Jitri Micro-Nano Automation Institute Co., Ltd. | A digital-to-analog converter |
| CN116366066A (en) * | 2021-12-27 | 2023-06-30 | 圣邦微电子（北京）股份有限公司 | Arithmetic circuit |
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