CN202103651U - Digital/analog conversion card - Google Patents
Digital/analog conversion card Download PDFInfo
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- CN202103651U CN202103651U CN2011201351238U CN201120135123U CN202103651U CN 202103651 U CN202103651 U CN 202103651U CN 2011201351238 U CN2011201351238 U CN 2011201351238U CN 201120135123 U CN201120135123 U CN 201120135123U CN 202103651 U CN202103651 U CN 202103651U
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- analog card
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Abstract
The utility model relates to a digital/analog conversion card, which comprises a signal input module, a programmable logic circuit, a digital/analog conversion module and a signal output module, which are sequentially connected with each other, wherein the signal input module is used for receiving an inputted digital signal, the programmable logic circuit is used for processing the received digital signal and for controlling the digital/analog conversion module to convert the processed digital signal to an analog signal, the digital/analog conversion module is a precise 18-bit digital/analog converter, and the signal output module is used for outputting the analog signal.
Description
[technical field]
The utility model relates to industrial control field, particularly a kind of digital/analog card.
[background technology]
D/A switch (Digital Analog is called for short D/A) often is applied to motion control field, and the precision of D/A switch and performance have largely determined the control precision and the performance of system.
Traditional digital/analog card generally adopts the not high D/A converter module of precision to change, and makes that the control precision of transition card is low.Control precision like the digital/analog card on laser marking machine is low, can make that the mark of getting is coarse.
[utility model content]
Based on this, be necessary the digital/analog card that provides a kind of precision higher.
A kind of digital/analog card; Comprise the signal input module, PLD, D/A switch module and the signal output module that link to each other successively; Said signal input module is used to receive the digital signal of input; Said PLD is used for the digital signal that receives is handled; And the digital signal of controlling after said D/A switch module will be handled converts analog signal into, and said D/A switch module is the D/A of 18 of precision, and said signal output module is used to export said analog signal.
Preferably, also comprise power management module, said power management module links to each other respectively with signal output module with said signal input module, PLD, number/film modular converter, is used to provide stabilized power supply.
Preferably, also comprise the state indicating module that links to each other with said PLD, said state indicating module is used in reference to the operating state of showing digital/analog card.
Preferably, said D/A converter module is the D/A of 18 of the precision of multi-disc serial.
Preferably, said analog signal adopts voltage form output.
Preferably, said digital signal and analog signal are differential signal.
Preferably, said signal input module comprises the differential signal receiver that is used for the differential signal that receives is treated to single-ended signal.
Preferably, said signal output module comprises the differential signal driver that is used for single-ended signal is treated to differential signal.
Preferably, also comprise and link to each other with said power management module and be used for filter capacitor voltage filter.
Preferably, said PLD adopts the CPLD circuit.
Above-mentioned digital/analog card adopts 18 figure places/weighted-voltage D/A converter, converts the digital signal of importing into analog signal, improved conversion accuracy, and the commentaries on classics linearity of 18 figure places/weighted-voltage D/A converter is better, and temperature is floated little, and stability is high, and antijamming capability is strong.
[description of drawings]
Fig. 1 is the internal structure sketch map of digital/analog card among the embodiment;
Fig. 2 is the internal structure sketch map of digital/analog card among another embodiment.
[embodiment]
Below in conjunction with concrete embodiment and accompanying drawing the technical scheme of the utility model is carried out detailed description.
As shown in Figure 1, a kind of digital/analog card comprises the signal input module 110, PLD 120, D/A switch module 130 and the signal output module 140 that link to each other successively.
Signal input module 110 is used to receive the digital signal of input.Digital/analog card is applied in the kinetic control system, receives the digital signal that control card is carried.This digital signal is a differential signal, and the differential signal common mode inhibition capacity is strong.Signal input module 110 is processed into single-ended signal with the differential signal of input.
PLD 120 is used for the digital signal that receives is handled, and the digital signal of controlling after D/A switch module 130 will be handled converts analog signal into.120 pairs of digital signals of PLD are handled, and generate triggering signal in conjunction with address signal and enable signal.PLD 120 can be CPLD (Complex Programmable Logic Device, CPLD) or FPGA (Field-Programmable Gate Array, field programmable gate array) etc.Among this embodiment, PLD 120 is CPLD, and the CPLD integrated level is high, has functions such as self-detection, warning function, signal distribution.120 pairs of single-ended signals of PLD are handled.
D/A (D/A) modular converter 130 is used for converting the digital signal after handling into analog signal.This analog signal can be differential signal, and the differential signal common mode inhibition capacity is strong.This analog signal adopts the form output of voltage.Among this embodiment, D/A switch module 130 is the D/A (DigitalAnalog Converter, be called for short DAC) of 18 of precision, and is the D/A of 18 of the precision of multi-disc serial.The D/A that the precision of employing multi-disc serial is 18 further improves conversion accuracy.The D/A that this precision is 18 can adopt AD5781.Wherein, AD5781 is a single channel, 18, no buffer voltagc output DAC, adopts the bipolar power supply power supply of the highest 33V; Positive benchmark input voltage range is 5V to VDD-2.5V, and negative reference voltage input range is VSS+2.5V to 0V, and the relative accuracy maximum is ± 0.5LSB; Guarantee the job note tonality, differential nonlinearity (DNL) maximum is ± 0.5LSB that temperature is floated little; Maximum temperature is floated and is merely 0.05ppm/ ℃, and stability is high, and antijamming capability is strong.
Signal output module 140 is used to export analog signal.The analog signal of 140 pairs of D/A modular converters of signal output module 130 output is amplified, and exports after single-ended signal is treated to differential signal.
In one embodiment; As shown in Figure 2; Above-mentioned digital/analog card also comprises power management module 150 and state indicating module 160 except comprising signal input module 110, PLD 120, D/A switch module 130 and the signal output module 140 that links to each other successively.Wherein,
Power management module 150 links to each other respectively with signal input module 110, PLD 120, D/A switch module 130 and signal output module 140, is used to each module power supply is provided.The power supply that power management module 150 provides can be ± 15V, ± 8V, and+3.3V stabilized power supply, and to DAC precision to be provided be 0.01% reference voltage.
State indicating module 160 links to each other with PLD 120, is used in reference to the operating state of showing digital/analog card.That operating state can be is in proper working order, job failure etc.State indicating module 160 can adopt the indicator light of different colours to represent, adopts the green light indication like operate as normal, and job failure adopts the red colored lamp indication.
In the preferred embodiment, above-mentioned digital/analog card also comprises filter capacitor, and this filter capacitor links to each other with power management module 150, is used for voltage filter.Filter capacitor is the alminium electrolytic condenser of 4 1000uf among this embodiment.Power management module 150 through 4 filter capacitors respectively with signal input module 110 between, PLD 120, D/A switch module 130 link to each other with signal output module 140; Adopt jumbo filter capacitor that the voltage that power management module 150 provides is carried out Filtering Processing, reduce and disturb.
In the preferred embodiment; Signal input module 110 comprises differential signal receiver; Signal output module 140 comprises differential signal driver, and differential signal receiver is used for the differential signal that receives is treated to single-ended signal, and differential signal driver is used for single-ended signal is treated to differential signal.Because of the input digital signal be differential signal; The differential signal of the numeral that differential signal receiver will receive converts the single-ended signal of numeral into; D/A switch module 130 converts the single-ended signal of numeral into the single-ended signal of simulation; Amplify by the single-ended signal of differential driving module again, and convert the differential signal of simulation into, so that output simulation.
Above-mentioned digital/analog card can be supported the two-shipper head, supports multiple galvanometers such as GSI (scanning galvanometer), CSI, SCANLAB.This digital-to-analogue conversion card volume is little, and integrated level is high, adopts the design of 4 laminates, comprises that mainly ground wire one deck, power line one deck, holding wire are two-layer, guarantees a complete ground level, has improved the Electro Magnetic Compatibility of digital/analog card.
Above-mentioned digital/analog card adopts 18 figure places/weighted-voltage D/A converter, converts the digital signal of importing into analog signal, improved conversion accuracy, and the commentaries on classics linearity of 18 figure places/weighted-voltage D/A converter is better, and temperature is floated little, and stability is high, and antijamming capability is strong.
In addition, adopt filter capacitor that the voltage filter that power management module provides has been reduced interference; PLD adopts the CPLD circuit, has functions such as self-detection, warning function, signal distribution; Digital signal and analog signal adopt differential signal, and common mode inhibition capacity is strong.
The above embodiment has only expressed several kinds of execution modes of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection range of the utility model.Therefore, the protection range of the utility model patent should be as the criterion with accompanying claims.
Claims (10)
1. digital/analog card; It is characterized in that; Comprise the signal input module, PLD, D/A switch module and the signal output module that link to each other successively; Said signal input module is used to receive the digital signal of input, and said PLD is used for the digital signal that receives is handled, and the digital signal of controlling after said D/A switch module will be handled converts analog signal into; Said D/A switch module is the D/A of 18 of precision, and said signal output module is used to export said analog signal.
2. digital/analog card according to claim 1; It is characterized in that; Also comprise power management module, said power management module links to each other respectively with signal output module with said signal input module, PLD, number/film modular converter, is used to provide stabilized power supply.
3. digital/analog card according to claim 1 is characterized in that, also comprises the state indicating module that links to each other with said PLD, and said state indicating module is used in reference to the operating state of showing digital/analog card.
4. digital/analog card according to claim 1 is characterized in that, said D/A converter module is the D/A of 18 of the precision of multi-disc serial.
5. digital/analog card according to claim 1 is characterized in that, said analog signal adopts voltage form output.
6. digital/analog card according to claim 1 is characterized in that said digital signal and analog signal are differential signal.
7. digital/analog card according to claim 6 is characterized in that, said signal input module comprises the differential signal receiver that is used for the differential signal that receives is treated to single-ended signal.
8. digital/analog card according to claim 7 is characterized in that said signal output module comprises the differential signal driver that is used for single-ended signal is treated to differential signal.
9. digital/analog card according to claim 1 is characterized in that, also comprises linking to each other with said power management module and being used for the filter capacitor to voltage filter.
10. digital/analog card according to claim 1 is characterized in that, said PLD adopts the CPLD circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201351238U CN202103651U (en) | 2011-04-29 | 2011-04-29 | Digital/analog conversion card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201351238U CN202103651U (en) | 2011-04-29 | 2011-04-29 | Digital/analog conversion card |
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| Publication Number | Publication Date |
|---|---|
| CN202103651U true CN202103651U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201351238U Expired - Fee Related CN202103651U (en) | 2011-04-29 | 2011-04-29 | Digital/analog conversion card |
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| CN (1) | CN202103651U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832947A (en) * | 2012-08-27 | 2012-12-19 | 深圳市大族激光科技股份有限公司 | 20-bit galvanometer digital-to-analogue conversion plate for laser marking machine |
| CN106827835A (en) * | 2015-12-07 | 2017-06-13 | 北大方正集团有限公司 | Synchronizing signal control method and synchronizing signal Control card |
| CN108896815A (en) * | 2018-06-29 | 2018-11-27 | 合容电气股份有限公司 | A kind of open-type wireless current transformer converter and signal conversion method |
-
2011
- 2011-04-29 CN CN2011201351238U patent/CN202103651U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832947A (en) * | 2012-08-27 | 2012-12-19 | 深圳市大族激光科技股份有限公司 | 20-bit galvanometer digital-to-analogue conversion plate for laser marking machine |
| CN102832947B (en) * | 2012-08-27 | 2016-01-20 | 大族激光科技产业集团股份有限公司 | For 20 galvanometer digital-to-analogue conversion plate of laser marking machine |
| CN106827835A (en) * | 2015-12-07 | 2017-06-13 | 北大方正集团有限公司 | Synchronizing signal control method and synchronizing signal Control card |
| CN108896815A (en) * | 2018-06-29 | 2018-11-27 | 合容电气股份有限公司 | A kind of open-type wireless current transformer converter and signal conversion method |
| CN108896815B (en) * | 2018-06-29 | 2020-09-08 | 合容电气股份有限公司 | Open-type wireless current transformer converter and signal conversion method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20190429 |