CN203261301U - AD9850-based signal source system - Google Patents
AD9850-based signal source system Download PDFInfo
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- CN203261301U CN203261301U CN 201320207637 CN201320207637U CN203261301U CN 203261301 U CN203261301 U CN 203261301U CN 201320207637 CN201320207637 CN 201320207637 CN 201320207637 U CN201320207637 U CN 201320207637U CN 203261301 U CN203261301 U CN 203261301U
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- chip microcomputer
- at89s52 single
- signal source
- source system
- pass filter
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Abstract
The utility model discloses an AD9850-based signal source system comprising an AT89S52 single chip microcomputer, a keyboard circuit and a display module, wherein the keyboard circuit and the display module are connected with the AT89S52 single chip microcomputer, the AT89S52 single chip microcomputer is connected to an AD9850, output of the AD9850 is connected with a low-pass filter, and finally a signal is output from the low-pass filter. A keyboard key value is read through the AT89S52 single chip microcomputer, a corresponding command is selected to control the AD9850 to generate sine waves of different frequencies, the sine waves are sent to an internal comparator through the low-pass filter and standard square waves can be generated, and the display module is used for displaying frequency and realizing human-computer information exchange. The AD9850-based signal source system has the characteristics of simple construction, convenient adjustment, stable performance and low cost.
Description
Technical field
The utility model relates to a kind of signal source device field, specifically a kind of signal source system based on AD9850.
Background technology
In electronic information technical field, often to use some signals as measuring basis signal or input signal, namely so-called signal source.Development along with electronic technology, requirement to signal source is more and more higher, require its output frequency up to microwave frequency band even higher, frequency resolution reaches Millisecond hertz even less, respective tones is counted more, frequency switching time reaches the ns level, and spectral purity is high, simultaneously the power consumption of signal source, volume, weight etc. is also had higher requirement.Design that a frequency and resolution are higher, change-over time still less, signal generator that spectral purity is higher becomes people's exigence.And based on the product of DDS technology, can well reach above-mentioned properties requirement, for the better faster development of science and technology provides effective Equipment Foundations, under such background, high-precision signal source is arisen at the historic moment just.
Summary of the invention
Problem to be solved in the utility model provides a kind of signal source system.This system adopts the AD9850 chip as the system core.
The technical solution of the utility model is: a kind of signal source system based on AD9850, include the AT89S52 single-chip microcomputer, the keyboard circuit and the display module that are connected with the AT89S52 single-chip microcomputer, the AD9850 that the AT89S52 single-chip microcomputer connects, AD9850 output connects low pass filter, at last from low-pass filter output signal.
Described keyboard circuit uses the 4*4 matrix keyboard.Described display module adopts the LCD1602 LCDs.
The utility model advantage: this signal source system practical function, the signal accuracy that produces, resolution height, signal frequency range is wide, and spectral purity is good.
Description of drawings
Fig. 1 is the theory diagram of this practical full mold.
Embodiment
A kind of signal source system based on AD9850, include AT89S52 single-chip microcomputer 1, the Keysheet module 2 that is connected with the AT89S52 single-chip microcomputer and LCD1602 display module 3, the AD9850 module 4 that is connected with the output of AT89S52 single-chip microcomputer, and the low pass filter 5 of AD9850 module output connection, draw signal through signal output module 6 outputs from low pass filter at last.
Use principle of the present utility model:
Direct Digital frequency synthesis (DDS) chip is selected the AD9850 chip of U.S. A/D company, 32 bit frequency control words by AT89S52 single-chip microcomputer 1 control AD9850 module 4, produce the stable sinusoidal signal of 1Hz-9.9MHz, 1 pair of Keysheet module 2 button of AT89S52 single-chip microcomputer are identified, the IO interface of AT89S52 single-chip microcomputer 1 connects LCD1602 display module 3, in order to show current state information, AD9850 module 4 signals are exported through low pass filter 5, at last from output module 6 output desired signals.
Claims (2)
1. signal source system based on AD9850, it is characterized in that: include the AT89S52 single-chip microcomputer, the keyboard circuit and the display module that are connected with the AT89S52 single-chip microcomputer, the AT89S52 single-chip microcomputer is connected to AD9850, AD9850 output connects low pass filter, at last from low-pass filter output signal.
2. a kind of signal source system based on AD9850 according to claim 1 is characterized in that: described keyboard circuit use 4*4 matrix keyboard, described display module employing LCD1602 LCDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320207637 CN203261301U (en) | 2013-04-23 | 2013-04-23 | AD9850-based signal source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320207637 CN203261301U (en) | 2013-04-23 | 2013-04-23 | AD9850-based signal source system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203261301U true CN203261301U (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320207637 Expired - Fee Related CN203261301U (en) | 2013-04-23 | 2013-04-23 | AD9850-based signal source system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203261301U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633968A (en) * | 2013-12-03 | 2014-03-12 | 大连大学 | Digital signal generator |
| CN104485924A (en) * | 2014-12-02 | 2015-04-01 | 上海电机学院 | Multi-path high-power high-frequency signal generator used for piezoelectric ceramics |
-
2013
- 2013-04-23 CN CN 201320207637 patent/CN203261301U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633968A (en) * | 2013-12-03 | 2014-03-12 | 大连大学 | Digital signal generator |
| CN104485924A (en) * | 2014-12-02 | 2015-04-01 | 上海电机学院 | Multi-path high-power high-frequency signal generator used for piezoelectric ceramics |
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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: 20131030 Termination date: 20140423 |