CN206249140U - A kind of programmable DDS arbitrary waveform signal generators - Google Patents
A kind of programmable DDS arbitrary waveform signal generators Download PDFInfo
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- CN206249140U CN206249140U CN201621302455.XU CN201621302455U CN206249140U CN 206249140 U CN206249140 U CN 206249140U CN 201621302455 U CN201621302455 U CN 201621302455U CN 206249140 U CN206249140 U CN 206249140U
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- module
- output end
- programmable
- programmable dds
- core controller
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Abstract
The utility model discloses a kind of programmable DDS arbitrary waveform signal generators, including signal generator body, the signal generator is made up of touch display screen, core controller, programmable DDS module, the first D/A converter module, elliptical low-pass ripple module, multiplier amplitude modulation module and the second D/A converter module；Touch display screen is connected with core controller；Core controller is connected with programmable DDS module；The output end of programmable DDS module connects elliptical low-pass ripple module input via the first D/A converter module, and the output end of elliptical low-pass ripple module connects an input of multiplier amplitude modulation module；The output end of core controller connects another input of multiplier amplitude modulation module via the second D/A converter module；The output end of multiplier amplitude modulation module forms the output end of signal generator body.The features such as the utility model has stability high, high precision and higher hamonic wave few.
Description
Technical field
The utility model is related to signal generator technical field, and in particular to a kind of programmable DDS random waveforms signal hair
Raw device.
Background technology
Explosibility test often very disruptive, and moment occur, some parameter testings measurement once complete difficulty compared with
Greatly, and repeatedly test and often lead to input increase.There is related test parameters to repeat to simulate, it is a convenient to design
Random waveform signal generating Instrument seem particularly necessary.
Traditional function signal generator uses simulation, it is difficult to produce desired random waveform signal.Usual base
It also can only be fixed a certain in the direct digital synthesizers waveform of address generator, it is impossible to any change；Phase is typically based on to tire out
Plus the synthetic waveform of device with " any " one, but on condition that can will not reached real in advance in Wave data storage to ROM
Arbitrary signal occur.It will be apparent that DDS (Direct Digital Synthesizer) chip that this function is fixed not only has frequency
Rate Bandwidth-Constrained, the problems such as spurious components are more, and often cannot arbitrarily synthesize desired test waveform signal.
Utility model content
To be solved in the utility model is the problem that existing signal generator is difficult to generate any stimulus waveform, is carried
For a kind of programmable DDS arbitrary waveform signal generators.
To solve the above problems, the utility model is achieved through the following technical solutions：
A kind of programmable DDS arbitrary waveform signal generators, including signal generator body, the signal generator is by touching
Display screen, core controller, programmable DDS module, the first D/A converter module, elliptical low-pass ripple module, multiplier is touched to adjust
Width module and the second D/A converter module are constituted.Touch display screen is connected with core controller.Core controller and programmable DDS
Module is connected.The output end of programmable DDS module connects elliptical low-pass ripple module input via the first D/A converter module,
The output end of elliptical low-pass ripple module connects an input of multiplier amplitude modulation module.The output end of core controller via
Second D/A converter module connects another input of multiplier amplitude modulation module.The output end of multiplier amplitude modulation module forms letter
The output end 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 controllers.
In such scheme, may be programmed DDS module is fpga chip.
In such scheme, touch display screen touches display integrated chip using TFT.
Compared with prior art, using the human-computer interaction interface that touch-screen is good, and STM32 high speed data processings and
FPGA arbitrary signal flexible in programming, realizes that waveform is optional, frequency/amplitude is adjustable, with stability is high, high precision and high order are humorous
The features such as ripple is few.
Brief description of the drawings
Fig. 1 is a kind of theory diagram of programmable DDS arbitrary waveform signal generators.
Specific embodiment
A kind of programmable DDS arbitrary waveform signal generators, 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 is constituted.Touch display screen is connected with core controller.Core controller is connected with programmable DDS module.Programmable DDS module
Output end via the first D/A converter module connect elliptical low-pass ripple module input, the output of elliptical low-pass ripple module
One input of end connection multiplier amplitude modulation module.The output end of core controller multiplies via the connection of the second D/A converter module
Another input of musical instruments used in a Buddhist or Taoist mass amplitude modulation module.The output end of multiplier amplitude modulation module forms the output of the signal generator body
End.
In view of random waveform and frequency-adjustable, signal composite part of the present utility model can not use functional solidification
DDS chips, but use the programmable DDS module forms of FPGA.Two-way communication between STM32 controllers and touch display screen,
STM32 controllers will send UI data to touch display screen, and touch coordinate information is also fed back to STM32 controls by touch display screen
Device processed.Equally, the communication of STM32 controllers and fpga chip is also two-way, herein using SPI full-duplex communications.
Touch display screen touches display integrated chip AD9708 using 2.8 cun of TFT.Core controller is STM32 controls
Device.DDS functions, including frequency control word, phase accumulator, address generator, data storage are realized using FPGA hardware description
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 that software controls 0-5V spans of control limit of control.
The utility model, as core controller, is touched using TFT-LCD touch-screens and draws required letter using STM32
Number waveform.During core controller is by gathering and quantifying that signal delivered into the programmable DDS module that FPGA is constituted, generation numeral
Discrete signal, the digital discrete signal realizes that digital discrete signal is converted into simulating continuous wave through a D/A modules, then through ellipse
After circle low-pass filtering module is smoothed, in feeding multiplier amplitude modulation module.Meanwhile, core controller recycles 12
First D/A modules are sent into amplitude modulation control signal in multiplier amplitude modulation module.Finally, analog waveform signal is in multiplier amplitude modulation mould
Waveform amplitude modulation, and the desired random waveform signal of output test are carried out in block.
The utility model is appointed using the good human-computer interaction interface of touch-screen, and STM32 high speed data processings and FPGA
Meaning signal flexible in programming, realizes that waveform is optional, frequency/amplitude is adjustable, with stability is high, high precision and higher hamonic wave it is few etc.
Feature.
Claims (6)
1. a kind of programmable DDS arbitrary waveform signal generators, including signal generator body, it is characterised in that：The 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 output end of programmable DDS module connects elliptical low-pass ripple via the first D/A converter module
Module input, the output end of elliptical low-pass ripple module connects an input of multiplier amplitude modulation module；Core controller
Output end via the second D/A converter module connect multiplier amplitude modulation module another input；Multiplier amplitude modulation module
Output end forms the output end of signal generator body.
2. a kind of programmable DDS arbitrary waveform signal generators 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 generators according to claim 1, it is characterised in that：Core is controlled
Device is bi-directionally connected with programmable DDS module.
4. a kind of programmable DDS arbitrary waveform signal generators according to claim 1, it is characterised in that：Core is controlled
Device is STM32 controllers.
5. a kind of programmable DDS arbitrary waveform signal generators according to claim 1, it is characterised in that：Programmable DDS
Module is fpga chip.
6. a kind of programmable DDS arbitrary waveform signal generators 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 |
|---|---|---|---|
| CN201621302455.XU CN206249140U (en) | 2016-11-30 | 2016-11-30 | A kind of programmable DDS arbitrary waveform signal generators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621302455.XU CN206249140U (en) | 2016-11-30 | 2016-11-30 | A kind of programmable DDS arbitrary waveform signal generators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206249140U true CN206249140U (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621302455.XU Expired - Fee Related CN206249140U (en) | 2016-11-30 | 2016-11-30 | A kind of programmable DDS arbitrary waveform signal generators |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106444963A (en) * | 2016-11-30 | 2017-02-22 | 桂林电子科技大学 | Programmable DDS arbitrary waveform signal generator |
-
2016
- 2016-11-30 CN CN201621302455.XU patent/CN206249140U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106444963A (en) * | 2016-11-30 | 2017-02-22 | 桂林电子科技大学 | Programmable DDS arbitrary waveform signal generator |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170613 Termination date: 20171130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |