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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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 63
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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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 ] A method for producing a semiconductor device
The utility model relates to an industrial control field, in particular to digital/analog conversion card.
[ background of the invention ]
Digital-to-Analog (D/a) conversion is often used in the field of motion control, and the accuracy and performance of the D/a conversion largely determine the control accuracy and performance of the system.
The traditional digital/analog conversion card generally adopts a digital-analog conversion module with low precision to carry out conversion, so that the control precision of the conversion card is low. For example, the control accuracy of the digital/analog conversion card on the laser marking machine is low, which makes the mark to be marked rough.
[ Utility model ] content
Based on this, it is necessary to provide a digital/analog conversion card with high precision.
A digital-to-analog conversion card comprises a signal input module, a programmable logic circuit, a digital-to-analog conversion module and a signal output module which are sequentially connected, wherein the signal input module is used for receiving input digital signals, the programmable logic circuit is used for processing the received digital signals and controlling the digital-to-analog conversion module to convert the processed digital signals into analog signals, the digital-to-analog conversion module is a digital-to-analog converter with 18-bit precision, and the signal output module is used for outputting the analog signals.
Preferably, the power supply device further comprises a power supply management module, wherein the power supply management module is respectively connected with the signal input module, the programmable logic circuit, the digital/film conversion module and the signal output module and is used for providing a stable power supply.
Preferably, the digital/analog conversion card further comprises a status indication module connected with the programmable logic circuit, wherein the status indication module is used for indicating the working status of the digital/analog conversion card.
Preferably, the digital-to-analog conversion module is a multi-chip serial 18-bit precision digital-to-analog converter.
Preferably, the analog signal is output in the form of a voltage.
Preferably, the digital signal and the analog signal are both differential signals.
Preferably, the signal input module comprises a differential signal receiver for processing the received differential signal into a single-ended signal.
Preferably, the signal output module includes a differential signal driver for processing a single-ended signal into a differential signal.
Preferably, the power supply further comprises a filter capacitor connected with the power supply management module and used for filtering voltage.
Preferably, the programmable logic circuit adopts a complex programmable logic device circuit.
The digital/analog conversion card adopts the 18-digit/analog converter to convert the input digital signal into the analog signal, thereby improving the conversion precision, and the 18-digit/analog converter has better conversion linearity, small temperature drift, high stability and strong anti-interference capability.
[ description of the drawings ]
FIG. 1 is a diagram illustrating an internal structure of an embodiment of a digital-to-analog converter card;
fig. 2 is a schematic diagram of the internal structure of the digital-to-analog conversion card in another embodiment.
[ detailed description ] embodiments
The technical solution of the present invention will be described in detail with reference to the following specific embodiments and accompanying drawings.
As shown in fig. 1, a digital/analog conversion card includes a signal input module 110, a programmable logic circuit 120, a digital/analog conversion module 130 and a signal output module 140, which are connected in sequence.
The signal input module 110 is used for receiving an input digital signal. The digital/analog conversion card is applied to a motion control system and receives a digital signal transmitted by a control card. The digital signal is a differential signal which has strong common mode rejection capability. The signal input module 110 processes the input differential signal into a single-ended signal.
The programmable logic circuit 120 is configured to process a received digital signal and control the digital-to-analog conversion module 130 to convert the processed digital signal into an analog signal. The programmable logic circuit 120 processes the digital signal and combines the address signal and the enable signal to generate a trigger signal. The Programmable Logic circuit 120 may be a CPLD (Complex Programmable Logic Device), an FPGA (Field-Programmable Gate Array), or the like. In this embodiment, the programmable logic circuit 120 is a CPLD, which has a high integration level and has functions of self-detection, alarm, signal distribution, and the like. The programmable logic circuit 120 processes the single-ended signal.
The digital-to-analog (D/a) conversion module 130 is used for converting the processed digital signal into an analog signal. The analog signal can be a differential signal which has strong common mode rejection capability. The analog signal is output in the form of a voltage. In this embodiment, the digital-to-analog conversion module 130 is an 18-bit precision digital-to-analog Converter (DAC), and is a multi-chip serial 18-bit precision digital-to-analog Converter. The conversion precision is further improved by adopting a plurality of serial digital-to-analog converters with the precision of 18 bits. The 18-bit precision digital-to-analog converter may employ AD 5781. The AD5781 is a single-channel, 18-bit and buffer-voltage-free output DAC, a bipolar power supply with the highest voltage of 33V is adopted for power supply, the input range of positive reference voltage is 5V to VDD-2.5V, the input range of negative reference voltage is VSS +2.5V to 0V, the maximum value of relative precision is +/-0.5 LSB, the work monotonicity is guaranteed, the maximum value of Differential Nonlinearity (DNL) is +/-0.5 LSB, the temperature drift is small, the maximum temperature drift is only 0.05 ppm/DEG C, the stability is high, and the anti-interference capability is strong.
The signal output module 140 is used for outputting an analog signal. The signal output module 140 amplifies the analog signal output by the digital/analog conversion module 130, and processes the single-end signal into a differential signal for output.
In one embodiment, as shown in fig. 2, the digital-to-analog conversion card includes a power management module 150 and a status indication module 160 in addition to the signal input module 110, the programmable logic circuit 120, the digital-to-analog conversion module 130 and the signal output module 140 which are connected in sequence. Wherein,
the power management module 150 is connected to the signal input module 110, the programmable logic circuit 120, the digital-to-analog conversion module 130, and the signal output module 140, respectively, and is configured to provide power to each module. The power supply provided by the power management module 150 can be a ± 15V, + 8V, +3.3V regulated power supply, and provides a reference voltage with an accuracy of 0.01% to the DAC.
The status indication module 160 is connected to the programmable logic circuit 120 for indicating the operating status of the digital/analog converter card. The working state can be normal working, working failure and the like. The status indication module 160 may be indicated by indication lamps with different colors, such as a green light for normal operation and a red light for work failure.
In a preferred embodiment, the digital-to-analog conversion card further comprises a filter capacitor, and the filter capacitor is connected to the power management module 150 and is used for filtering the voltage. The filter capacitor in this embodiment is 4 aluminum electrolytic capacitors of 1000 uf. The power management module 150 is connected to the signal input module 110, the programmable logic circuit 120, the digital-to-analog conversion module 130, and the signal output module 140 through 4 filter capacitors, and the filter capacitors with large capacity are used to filter the voltage provided by the power management module 150, so as to reduce interference.
In a preferred embodiment, the signal input module 110 includes a differential signal receiver, and the signal output module 140 includes a differential signal driver, the differential signal receiver is configured to process the received differential signal into a single-ended signal, and the differential signal driver is configured to process the single-ended signal into a differential signal. Because the input digital signal is a differential signal, the differential signal receiver converts the received digital differential signal into a digital single-ended signal, the digital-to-analog conversion module 130 converts the digital single-ended signal into an analog single-ended signal, and the differential driving module amplifies the analog single-ended signal and converts the analog single-ended signal into an analog differential signal for output.
The D/A conversion card can support double machine heads and various vibrating mirrors such as GSI (scanning vibrating mirror), CSI (channel state information), SCANLAB (scanning line mirror), and the like. The digital-analog conversion card is small in size and high in integration level, adopts a 4-layer plate design, mainly comprises a ground wire layer, a power wire layer and a signal wire layer, ensures a complete ground plane, and improves the electromagnetic compatibility of the digital-analog conversion card.
The digital/analog conversion card adopts the 18-digit/analog converter to convert the input digital signal into the analog signal, thereby improving the conversion precision, and the 18-digit/analog converter has better conversion linearity, small temperature drift, high stability and strong anti-interference capability.
In addition, the interference is reduced by adopting the filter capacitor to filter the voltage provided by the power management module; the programmable logic circuit adopts a complex programmable logic device circuit and has the functions of self detection, alarm function, signal distribution and the like; the digital signal and the analog signal adopt differential signals, and the common mode rejection capability is strong.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A digital-to-analog conversion card is characterized by comprising a signal input module, a programmable logic circuit, a digital-to-analog conversion module and a signal output module which are sequentially connected, wherein the signal input module is used for receiving input digital signals, the programmable logic circuit is used for processing the received digital signals and controlling the digital-to-analog conversion module to convert the processed digital signals into analog signals, the digital-to-analog conversion module is a digital-to-analog converter with the precision of 18 bits, and the signal output module is used for outputting the analog signals.
2. The digital-to-analog conversion card of claim 1, further comprising a power management module, said power management module being connected to said signal input module, said programmable logic circuit, said digital-to-analog conversion module and said signal output module, respectively, for providing a stable power.
3. A digital-to-analog conversion card according to claim 1, further comprising a status indication module connected to said programmable logic circuit, said status indication module being adapted to indicate an operational status of the digital-to-analog conversion card.
4. The digital-to-analog conversion card of claim 1, wherein the digital-to-analog conversion module is a multi-chip serial 18-bit precision digital-to-analog converter.
5. The digital-to-analog conversion card of claim 1, wherein said analog signal is outputted in a voltage form.
6. The digital-to-analog conversion card of claim 1, wherein said digital signal and said analog signal are both differential signals.
7. The digital-to-analog conversion card of claim 6, wherein the signal input module comprises a differential signal receiver for processing the received differential signal into a single-ended signal.
8. The digital-to-analog conversion card of claim 7, wherein the signal output module comprises a differential signal driver for processing a single-ended signal into a differential signal.
9. The digital-to-analog conversion card of claim 1, further comprising a filter capacitor connected to said power management module for filtering voltage.
10. A digital-to-analog conversion card according to claim 1, wherein said programmable logic circuit employs a complex programmable logic device circuit.
Priority Applications (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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201351238U CN202103651U (en) | 2011-04-29 | 2011-04-29 | Digital/analog conversion card |
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| CN202103651U true CN202103651U (en) | 2012-01-04 |
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| CN2011201351238U Expired - Fee Related CN202103651U (en) | 2011-04-29 | 2011-04-29 | Digital/analog conversion card |
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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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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20190429 |