CN106444963A - Programmable DDS arbitrary waveform signal generator - Google Patents
Programmable DDS arbitrary waveform signal generator Download PDFInfo
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- CN106444963A CN106444963A CN201611083408.5A CN201611083408A CN106444963A CN 106444963 A CN106444963 A CN 106444963A CN 201611083408 A CN201611083408 A CN 201611083408A CN 106444963 A CN106444963 A CN 106444963A
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- module
- signal generator
- programmable dds
- programmable
- amplitude modulation
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- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000013500 data storage Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/022—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
Abstract
The invention discloses a programmable DDS arbitrary waveform signal generator. The signal generator comprises a signal generator body, and the signal generator comprises a touch display screen, a core controller, a programmable DDS module, a first digital-to-analog conversion module, an oval low-pass filer module, a multiplier amplitude modulation module and a second digital-to-analog conversion module. The touch display screen is connected with the core controller. The core controller is connected with the programmable DDS module. The output end of the programmable DDS module is connected with the input end of the oval low-pass filer module through the first digital-to-analog conversion module, and the output end of the oval low-pass filer module is connected with one input end of the multiplier amplitude modulation module. The output end of the core controller is connected with the other input end of the multiplier amplitude modulation module through the second digital-to-analog conversion module. The output end of the multiplier amplitude modulation module forms the output end of the signal generator body. The signal generator has the advantages that stability and precision are high and higher harmonics are few.
Description
Technical field
The present invention relates to signal generator technical field is and in particular to a kind of programmable DDS arbitrary waveform signal generator.
Background technology
Explosibility test often very disruptive, and moment generation, some parameter testings measurements once complete difficulty relatively
Greatly, and repeatedly testing to often lead to put into increases.There are related test parameterss in order to repeat to simulate, design is a convenient
Random waveform signal generating Instrument seem particularly necessary.
Traditional function signal generator uses simulation method it is difficult to produce the random waveform signal wanted.Generally base
Also can only be fixing a certain it is impossible to any change in the direct digital synthesizers waveform of address generator；It is typically based on phase place to tire out
Plus the synthetic waveform of device can " any " one, but premise is intended in advance this Wave data be stored in ROM, does not reach real
Arbitrary signal occur.It will be apparent that fixing DDS (Direct Digital Synthesizer) chip of this function not only has frequency
The problems such as rate Bandwidth-Constrained, spurious components are many, and often cannot arbitrarily synthesize the test waveform signal wanted.
Content of the invention
To be solved by this invention is that existing signal generator is difficult to generate the problem of any stimulus waveform, provides one
Plant programmable DDS arbitrary waveform signal generator.
For solving the above problems, the present invention is achieved by the following technical solutions：
A kind of programmable DDS arbitrary waveform signal generator, including signal generator body, described signal generator is by touching
Touch display screen, core controller, programmable DDS module, the first D/A converter module, elliptical low-pass ripple module, multiplier tune
Width module and the second D/A converter module composition.Touch display screen is connected with core controller.Core controller and programmable DDS
Module connects.The outfan of programmable DDS module connects elliptical low-pass ripple module input via the first D/A converter module,
The outfan of elliptical low-pass ripple module connects an input of multiplier amplitude modulation module.The outfan of core controller via
Second D/A converter module connects another input of multiplier amplitude modulation module.The outfan of multiplier amplitude modulation module forms letter
The outfan of number generator body.
In such scheme, touch display screen is bi-directionally connected with core controller.
In such scheme, core controller is bi-directionally connected with programmable DDS module.
In such scheme, core controller is STM32 controller.
In such scheme, programmable DDS module is fpga chip.
In such scheme, touch display screen adopts TFT to touch display integrated chip.
Compared with prior art, using the human-computer interaction interface that touch screen is good, and STM32 high speed data processing and
FPGA arbitrary signal flexible in programming, realizes that waveform is optional, frequency/amplitude is adjustable, has that degree of stability is high, high precision and high order are humorous
The features such as ripple is few.
Brief description
Fig. 1 is a kind of theory diagram of programmable DDS arbitrary waveform signal generator.
Specific embodiment
A kind of programmable DDS arbitrary waveform signal generator, as shown in figure 1, by touch display screen, core controller, can
Programming DDS module, the first D/A converter module, elliptical low-pass ripple module, multiplier amplitude modulation module and the second digital-to-analogue conversion mould
Block forms.Touch display screen is connected with core controller.Core controller is connected with programmable DDS module.Programmable DDS module
Outfan via first D/A converter module connect elliptical low-pass ripple module input, the output of elliptical low-pass ripple module
End connects an input of multiplier amplitude modulation module.The outfan of core controller connects via the second D/A converter module to be taken advantage of
Another input of musical instruments used in a Buddhist or Taoist mass amplitude modulation module.The outfan of multiplier amplitude modulation module forms the output of this signal generator body
End.
In view of random waveform and frequency-adjustable, the signal composite part of the present invention can not be curable using existing work(
DDS chip, but adopt FPGA programmable DDS module form.Two-way communication between STM32 controller and touch display screen,
STM32 controller will send UI data to touch display screen, and touch coordinate information is also fed back to STM32 control by touch display screen
Device processed.Equally, the communication of STM32 controller and fpga chip is also two-way, and here adopts SPI full-duplex communication.
Touch display screen adopts 2.8 cun of TFT to touch display integrated chip AD9708.Core controller controls for STM32
Device.DDS function is realized using FPGA hardware description, including frequency control word, phase accumulator, address generator, data storage
The modules such as RAM, data storage ROM, SPI communication interface, clock module, selector, control RAM.Enter line amplitude with DAC module to adjust
Section, realizes software and controls 0-5V span of control limit of control.
The present invention adopts STM32 as core controller, touches the signal wave required for drawing using TFT-LCD touch screen
Shape.Core controller, by gathering and quantifying to deliver to signal in the programmable DDS module that FPGA is constituted, generates Digital Discrete
Signal, this digital discrete signal is realized digital discrete signal through a D/A module and is converted into simulating continuous wave, lower through ellipse
After pass filtering module is smoothed, send in multiplier amplitude modulation module.Meanwhile, core controller recycles the first of 12
D/A module sends into amplitude modulation control signal in multiplier amplitude modulation module.Finally, analog waveform signal is in multiplier amplitude modulation module
Carry out waveform amplitude modulation, and the random waveform signal that output test is wanted.
The present invention utilizes the good human-computer interaction interface of touch screen, and STM32 high speed data processing and FPGA arbitrarily believe
Number flexible in programming, realizes that waveform is optional, frequency/amplitude is adjustable, has that degree of stability is high, high precision and a spy such as higher hamonic wave is few
Point.
Claims (6)
1. a kind of programmable DDS arbitrary waveform signal generator, including signal generator body it is characterised in that：Described signal
Generator is by touch display screen, core controller, programmable DDS module, the first D/A converter module, elliptical low-pass ripple mould
Block, multiplier amplitude modulation module and the second D/A converter module composition；Touch display screen is connected with core controller；Core controller
It is connected with programmable DDS module；The outfan of programmable DDS module connects elliptical low-pass ripple via the first D/A converter module
Module input, the outfan of elliptical low-pass ripple module connects an input of multiplier amplitude modulation module；Core controller
Outfan via second D/A converter module connect multiplier amplitude modulation module another input；Multiplier amplitude modulation module
Outfan forms the outfan of signal generator body.
2. a kind of programmable DDS arbitrary waveform signal generator according to claim 1 it is characterised in that：Touch display
Screen is bi-directionally connected with core controller.
3. a kind of programmable DDS arbitrary waveform signal generator according to claim 1 it is characterised in that：Core controls
Device is bi-directionally connected with programmable DDS module.
4. a kind of programmable DDS arbitrary waveform signal generator according to claim 1 it is characterised in that：Core controls
Device is STM32 controller.
5. a kind of programmable DDS arbitrary waveform signal generator according to claim 1 it is characterised in that：Programmable DDS
Module is fpga chip.
6. a kind of programmable DDS arbitrary waveform signal generator according to claim 1 it is characterised in that：Touch display
Screen touches display integrated chip using TFT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611083408.5A CN106444963A (en) | 2016-11-30 | 2016-11-30 | Programmable DDS arbitrary waveform signal generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611083408.5A CN106444963A (en) | 2016-11-30 | 2016-11-30 | Programmable DDS arbitrary waveform signal generator |
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| CN201611083408.5A Pending CN106444963A (en) | 2016-11-30 | 2016-11-30 | Programmable DDS arbitrary waveform signal generator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303937A (en) * | 2018-04-11 | 2018-07-20 | 淮安信息职业技术学院 | A kind of filter based on ARM and FPGA |
| CN109557347A (en) * | 2018-11-14 | 2019-04-02 | 福建利利普光电科技有限公司 | A kind of arbitrary waveform signal generator with touch function |
| CN114115436A (en) * | 2021-10-21 | 2022-03-01 | 湖南艾科诺维科技有限公司 | Multi-path parallel DDS bidirectional linear frequency sweeping method, system and medium based on FPGA platform |
| CN117193212A (en) * | 2023-10-17 | 2023-12-08 | 上海东尚信息科技股份有限公司 | Automatic software control system for production |
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| US7557619B1 (en) * | 2008-03-10 | 2009-07-07 | Xilinx, Inc. | Digital frequency synthesis |
| CN102467152A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Method, device and system for realizing amplitude modulation and amplitude keying functions in signal source |
| CN103176503A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Digital display scope (DDS) signal generator and amplitude control method thereof |
| CN203289413U (en) * | 2013-06-20 | 2013-11-13 | 成都九洲迪飞科技有限责任公司 | Digital intermediate frequency module of transmitter |
| CN206249140U (en) * | 2016-11-30 | 2017-06-13 | 桂林电子科技大学 | A kind of programmable DDS arbitrary waveform signal generators |
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- 2016-11-30 CN CN201611083408.5A patent/CN106444963A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101131594A (en) * | 2006-08-25 | 2008-02-27 | 王悦 | DDS signal generator and waveshape memory depth control method thereof |
| US7557619B1 (en) * | 2008-03-10 | 2009-07-07 | Xilinx, Inc. | Digital frequency synthesis |
| CN102467152A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Method, device and system for realizing amplitude modulation and amplitude keying functions in signal source |
| CN103176503A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Digital display scope (DDS) signal generator and amplitude control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303937A (en) * | 2018-04-11 | 2018-07-20 | 淮安信息职业技术学院 | A kind of filter based on ARM and FPGA |
| CN108303937B (en) * | 2018-04-11 | 2023-09-19 | 江苏电子信息职业学院 | Filter based on ARM and FPGA |
| CN109557347A (en) * | 2018-11-14 | 2019-04-02 | 福建利利普光电科技有限公司 | A kind of arbitrary waveform signal generator with touch function |
| CN114115436A (en) * | 2021-10-21 | 2022-03-01 | 湖南艾科诺维科技有限公司 | Multi-path parallel DDS bidirectional linear frequency sweeping method, system and medium based on FPGA platform |
| CN114115436B (en) * | 2021-10-21 | 2023-06-13 | 湖南艾科诺维科技有限公司 | Multi-path parallel DDS bidirectional linear sweep frequency method, system and medium based on FPGA platform |
| CN117193212A (en) * | 2023-10-17 | 2023-12-08 | 上海东尚信息科技股份有限公司 | Automatic software control system for production |
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