CN204119192U - Function signal generator - Google Patents
Function signal generator Download PDFInfo
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- CN204119192U CN204119192U CN201420630406.3U CN201420630406U CN204119192U CN 204119192 U CN204119192 U CN 204119192U CN 201420630406 U CN201420630406 U CN 201420630406U CN 204119192 U CN204119192 U CN 204119192U
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- module
- waveform
- signal generator
- function signal
- waveform generation
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Abstract
The utility model relates to a kind of function signal generator based on direct digital frequency synthesis technology, belong to function signal generator, this generator comprises control system, input module, display module, waveform generation module, signal processing module and power module, power module is each module for power supply, input module link control module, control module connects waveform generation module and display module, waveform generation module connection signal processing module.It is that signal produces chip that the utility model have employed DDS chip, and with 89C51 control system for core, 4 × 4 input through keyboard instructions, LED output display, by low pass filter, integrating circuit and waveform selection processing of circuit, exports institute and want waveform.89C51 Control system architecture is simple, and reliable and stable, each port makes full use of, and solves the problem that the speed of waveform generation in prior art is not high with the resolution producing waveform.
Description
Technical field
The utility model belongs to function signal generator field, is specifically related to a kind of function signal generator based on direct digital frequency synthesis technology.
Background technology
Direct digital synthesis technique (DDS) technology is a kind of digital frequency synthesis principle newly, and it directly synthesizes required waveform from the angle of phase place.DDS technology produces the signal that frequency is fast, conversion speed is fast, resolution is high, phase place is controlled, therefore, be widely used in the fields such as electronic measurements, frequency modulation communication, electronic countermeasures, in recent years, the waveform generator of existing DDS technology is developed successively, produces and drop into application.But use the function signal generator of DDS technology, circuit complexity, cost are high, and the speed that generator produces waveform is not high with the resolution producing waveform, does not reach result of use.
Summary of the invention
In order to improve the speed of waveform generation in prior art and produce the resolution of waveform, the utility model provides a kind of function signal generator, this generator is a kind of function signal generator based on direct digital frequency synthesis technology, it is that signal produces chip that the utility model have employed DDS chip, with 89C51 control system for core, 4 × 4 input through keyboard instructions, LED output display, by low pass filter, integrating circuit and waveform selection processing of circuit, export institute and want waveform.
The technical solution of the utility model is: a kind of function signal generator, this generator comprises control system, input module, display module, waveform generation module, signal processing module and power module, power module is each module for power supply, input module link control module, control module connects waveform generation module and display module, waveform generation module connection signal processing module.
Described function generator also comprises savings power supply for subsequent use, and savings power supply for subsequent use connects each module in generator.Described signal processing module comprises integrating circuit, waveform selecting unit, low-pass filter circuit and wave form output unit, integrating circuit connects waveform selecting unit, waveform selecting unit connects low-pass filter circuit and wave form output unit, and low-pass filter circuit connects waveform generation module.The DDS module that described waveform generation module adopts AD9850 to form, inputs instruction by input module.Described input module is 4 × 4 matrix keyboard inputs.Described control system is the control system based on 89C51 chip.Described display module is LED display module, and LED display module is by I/O peripheral expansion interface connection control system.
The utility model has following good effect: 1. use savings power supply in the utility model, enhance the reliability of system.2. be design based on the function signal generator of AD9850 chip in the utility model, circuit is simple, and with low cost, operational efficiency is high.3. the utility model have employed DDS chip is that signal produces chip, and with 89C51 control system for core, 4 × 4 input through keyboard instructions, LED output display, by low pass filter, integrating circuit and waveform selection processing of circuit, exports institute and want waveform.89C51 Control system architecture is simple, and reliable and stable, each port makes full use of.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of the utility model function signal generator;
Fig. 2 is the circuit theory diagrams of the utility model function signal generator.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and operation principle, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present utility model, technical scheme.
As shown in Figure 1, a kind of function signal generator, comprises control module, waveform generation module, power module, savings power supply for subsequent use, signal processing module, input module and display module.Each module that power module connects in generator provides electric energy, the input of input module link control module performs instruction, control module connects waveform generation module and display module, and waveform generation module connection signal processing module, final waveform exports through signal processing module.Signal processing module comprises integrating circuit, waveform selecting unit, low-pass filter circuit and wave form output unit, integrating circuit connects waveform selecting unit, waveform selecting unit connects low-pass filter circuit and wave form output unit, and low-pass filter circuit connects waveform generation module.
Function signal generator in the utility model with single chip computer89C51 control system for core, other modules are connected to the P mouth of single-chip microcomputer by circuit, comprise input module, display module and waveform generation module, produce signal by signal transacting output waveform.During real work, using 4 × 4 matrix keyboards as input equipment, the frequency of the required waveform of input, give single-chip microcomputer order and carry out signal transacting, single-chip microcomputer connects drive circuit, then is shown by the light-emitting diode display in display module.Light-emitting diode display is made up of 8 digital display tubes, 8 bit ports will be taken because 8 charactrons are directly connected on single-chip microcomputer, take too much port, so native system with the addition of three or eight decoders, single-chip microcomputer connects 8 LED pipe by three or eight decoders, so only take 3 ports, for other module provides port.Wherein, power module adopts common single-phase bridge rectification circuit, by transformer, domestic power supply is become 15V, pass through bridge rectifier again, produce the direct current of+11V, by 7805 voltage stabilizing chips, produce+5V and power to single-chip microcomputer, by 2830 chips, produce+3.3V voltage to AD9850 chip power supply.In the utility model while mains supply, add savings power supply for subsequent use, prevent the situation of grid cut-off from occurring, guarantee the reliability of system.
As shown in Figure 2, control system centered by single-chip microcomputer (AT89C51 chip), is made up of crystal oscillating circuit, direct digital synthesizer DDS, Waveform generating circuit and serial communication circuit.Frequency is needed, single-chip microcomputer process information, by LED numeral method out by the input of 4 × 4 matrix keyboards.Connect DDS module by P0 mouth, produce the signal needed; Connect display module by P1 mouth, key in frequency with decimal system display; Connect keyboard by P2 mouth, key in and need frequency.
By reference to the accompanying drawings the utility model is exemplarily described above; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out; or design of the present utility model and technical scheme directly applied to other occasion, all within protection range of the present utility model without to improve.
Claims (7)
1. a function signal generator, it is characterized in that, this generator comprises control system, input module, display module, waveform generation module, signal processing module and power module, power module is each module for power supply, input module link control module, control module connects waveform generation module and display module, waveform generation module connection signal processing module.
2. function signal generator according to claim 1, is characterized in that: described function generator also comprises savings power supply for subsequent use, and savings power supply for subsequent use connects each module in generator.
3. function signal generator according to claim 1, it is characterized in that: described signal processing module comprises integrating circuit, waveform selecting unit, low-pass filter circuit and wave form output unit, integrating circuit connects waveform selecting unit, waveform selecting unit connects low-pass filter circuit and wave form output unit, and low-pass filter circuit connects waveform generation module.
4. function signal generator according to claim 1, is characterized in that: the DDS module that described waveform generation module adopts AD9850 to form, and inputs instruction by input module.
5. function signal generator according to claim 1, is characterized in that: described input module is 4 × 4 matrix keyboard inputs.
6. function signal generator according to claim 1, is characterized in that: described control system is the control system based on 89C51 chip.
7. function signal generator according to claim 1, is characterized in that: described display module is LED display module, and LED display module is by I/O peripheral expansion interface connection control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420630406.3U CN204119192U (en) | 2014-10-29 | 2014-10-29 | Function signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420630406.3U CN204119192U (en) | 2014-10-29 | 2014-10-29 | Function signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204119192U true CN204119192U (en) | 2015-01-21 |
Family
ID=52336467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420630406.3U Expired - Fee Related CN204119192U (en) | 2014-10-29 | 2014-10-29 | Function signal generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204119192U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113641211A (en) * | 2021-08-13 | 2021-11-12 | 艾尔普仪表科技(芜湖)有限公司 | Current output type function signal generator |
-
2014
- 2014-10-29 CN CN201420630406.3U patent/CN204119192U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113641211A (en) * | 2021-08-13 | 2021-11-12 | 艾尔普仪表科技(芜湖)有限公司 | Current output type function signal generator |
| CN113641211B (en) * | 2021-08-13 | 2023-06-30 | 艾尔普仪表科技(芜湖)有限公司 | Current output type function signal generator |
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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 |
Granted publication date: 20150121 Termination date: 20151029 |
|
| EXPY | Termination of patent right or utility model |