CN203164657U - Multipurpose signal-generator based on complex programmable logic device (CPLD) - Google Patents
Multipurpose signal-generator based on complex programmable logic device (CPLD) Download PDFInfo
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- CN203164657U CN203164657U CN 201320201069 CN201320201069U CN203164657U CN 203164657 U CN203164657 U CN 203164657U CN 201320201069 CN201320201069 CN 201320201069 CN 201320201069 U CN201320201069 U CN 201320201069U CN 203164657 U CN203164657 U CN 203164657U
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- waveform transformation
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Abstract
A multipurpose signal-generator based on a CPLD comprises a one-chip microcomputer control module, a CPLD module and a waveform transformation module which are connected orderly, and the power supply input ends of the one-chip microcomputer control module, the CPLD module and the waveform transformation module are connected with a voltage stabilization power supply circuit. The input end of the one-chip microcomputer control module is equipped with a keyboard input device, and the output end is equipped with a display device, and the waveform transformation module is connected with the display device via a selection key device. The multipurpose signal-generator based on the CPLD of the utility model is simple in structure, good in programming performance, fixed in time delay and stable and adjustable in square wave generation frequency, and has low clock requirements.
Description
Technical field
The utility model relates to a kind of signal generator, is specially a kind of multi-purpose signal generator based on CPLD.
Background technology
Current many schemes with signal source are a lot, and common has based on design proposals such as DDS chip and single-chip microcomputers, and these schemes mostly have different advantages and deficiency.
SCM Based design proposal is subject to the processing speed of single-chip microcomputer, calculate by common 1 microsecond of the instruction cycle of current single-chip microcomputer, synthesize normal degree of distortion less than 5% waveform, its sampled point generally is greater than 100, so the synthetic sinusoidal signal highest frequency of single-chip microcomputer can not be higher than 100KHz, but the adjustment of single-chip microcomputer signal is more convenient.
Based on DDS signal synthetic schemes, it is subject to the DDS chip of selecting for use, and it is comparatively convenient to adjust in the design parameter that chip provides, in addition, and the sine wave of the higher signal frequencies that the DDS synthetic schemes can produce.And the CPLD chip technology that gets up based on a kind of programmable logic array technical development is good with its programmability, and time-delay is generally nanosecond on the sheet, for the generation design of signal provides design platform preferably.
The utility model content
The technical matters that the utility model solves is to provide a kind of multi-purpose signal generator based on CPLD, to solve the problem that proposes in the above-mentioned background technology.
The technical matters that the utility model solves realizes by the following technical solutions:
A kind of multi-purpose signal generator based on CPLD, comprise the single chip control module, CPLD module and the waveform transformation module that link to each other successively, the power input of described single chip control module, CPLD module and waveform transformation module links to each other with voltage-stabilized power supply circuit, the input end of single chip control module is provided with finger-impu system, the output terminal of single chip control module is provided with display device, and described waveform transformation module links to each other with display device by the selection key device.
Further, be provided with square wave generation circuit, triangle generation circuit and sinusoidal wave generation circuit in the described waveform transformation module.
Beneficial effect:
The utility model is simple in structure, and program performance is good, and time-delay is fixing; Less demanding to clock generates the frequency stabilization of square wave and adjustable.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the sinusoidal wave circuit structure diagram that produces of the utility model.
Embodiment
In order to make realization technological means of the present utility model, creation characteristic, to reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of multi-purpose signal generator based on CPLD, comprise the single chip control module 1, CPLD module 2 and the waveform transformation module 3 that link to each other successively, the power input of described single chip control module 1, CPLD module 2 and waveform transformation module 3 links to each other with voltage-stabilized power supply circuit 7, the input end of single chip control module 1 is provided with finger-impu system 8, the output terminal of single chip control module 1 is provided with display device 9, and described waveform transformation module 3 links to each other with display device 9 by selection key device 10.Be provided with square wave generation circuit 4, triangle generation circuit 5 and sinusoidal wave generation circuit 6 in the described waveform transformation module 3.
The sine wave that sinusoidal wave generation circuit 6 produces can be produced through the diode shaping network by triangular wave.Sinusoidal wave can regarding as by the different straight-line segment stack of many slopes formed, and it is abundant to need only straight line, and the waveform that is made of straight line just can goodish near sinusoidal waveform, and the different straight-line segment of slope can be obtained through electric resistance partial pressure by triangular wave.As shown in Figure 2, described sinusoidal wave generation circuit 6 is the circuit of symmetry fully, finishes the approximate of offset of sinusoidal ripple positive-negative half-cycle respectively.The utility model has adopted the two-stage dividing potential drop.Can obtain nonlinear distortion less than the good sine wave of 0.5% waveform.
In the utility model, the user imports wave band and the frequency of the signal that will generate by finger-impu system 8, the display device 9 of single chip control module 1 shows the current demand signal data, single chip control module 1 generates control information to CPLD module 2 input signals simultaneously, CPLD module 2 is when reading control information, internal clocking is carried out corresponding conversion, and the square wave that 10 selections of user by selecting key device need so just can be at the waveform that shows the square wave that needs in display device 9.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.Claimed scope of the present utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. multi-purpose signal generator based on CPLD, comprise the single chip control module, CPLD module and the waveform transformation module that link to each other successively, it is characterized in that: the power input of described single chip control module, CPLD module and waveform transformation module links to each other with voltage-stabilized power supply circuit, the input end of single chip control module is provided with finger-impu system, the output terminal of single chip control module is provided with display device, and described waveform transformation module links to each other with display device by the selection key device.
2. a kind of multi-purpose signal generator based on CPLD according to claim 1 is characterized in that: be provided with square wave generation circuit, triangle generation circuit and sinusoidal wave generation circuit in the described waveform transformation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320201069 CN203164657U (en) | 2013-04-19 | 2013-04-19 | Multipurpose signal-generator based on complex programmable logic device (CPLD) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320201069 CN203164657U (en) | 2013-04-19 | 2013-04-19 | Multipurpose signal-generator based on complex programmable logic device (CPLD) |
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| Publication Number | Publication Date |
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| CN203164657U true CN203164657U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320201069 Expired - Fee Related CN203164657U (en) | 2013-04-19 | 2013-04-19 | Multipurpose signal-generator based on complex programmable logic device (CPLD) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713560A (en) * | 2013-12-31 | 2014-04-09 | 苏州市职业大学 | Multifunctional signal generator |
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2013
- 2013-04-19 CN CN 201320201069 patent/CN203164657U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713560A (en) * | 2013-12-31 | 2014-04-09 | 苏州市职业大学 | Multifunctional signal generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20140419 |