CN101989834A - Technology of amplitude-adjustable signal generator based on direct digital frequency synthesis (DDS) - Google Patents
Technology of amplitude-adjustable signal generator based on direct digital frequency synthesis (DDS) Download PDFInfo
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- CN101989834A CN101989834A CN200910183182XA CN200910183182A CN101989834A CN 101989834 A CN101989834 A CN 101989834A CN 200910183182X A CN200910183182X A CN 200910183182XA CN 200910183182 A CN200910183182 A CN 200910183182A CN 101989834 A CN101989834 A CN 101989834A
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- signal generator
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- pass filter
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Abstract
The invention discloses technology of an amplitude-adjustable signal generator based on a direct digital frequency synthesis (DDS) and relates to an amplitude-adjustable signal generator device based on DDS. The device comprises a liquid display, a keyboard control, a microprocessor AT89S52, a DDS signal generator AD9850, a TLC5615, a multiplier AD534, a voltage-controlled voltage source second-order high-pass filter, a second-order low-pass filter and an amplifier. Due to the adoption of TLC 5615, the design of the circuit is simplified, the design of the current amplitude-controllable signal source circuit is improved, and the control precision is improved. The signal generator amplitude adjustment problem is solved by taking the AD9850 and the TLC5615 as a core. When the technology is applied to an alternating magnetic field measuring instrument, ideal waveform data can be generated, the waveform is smooth and free from obvious burrs and the amplitude adjustment precision can reach 0.007V.
Description
Technical field:
The present invention relates to a kind of technology of generator, specifically relates to a kind of technology of the adjustable amplitude value signal generator based on DDS.
Background technology:
Signal source generator extensive use education experiment and scientific research engineering.Direct digital frequency synthesis technology (DDS) has the frequency resolution height, switch speed is fast, phase of output signal is continuous, exportable random waveform signal, can realize advantages such as digital automation control, makes it become the first-selection in system signal sources such as radar, communication, engineering design.In fields such as spread spectrum and frequency-hopping system, digital broadcasting, high definition TV, linear frequency modulation and instrument and meter and electronic measurementss, DDS has progressively become the core technology of high performance signal source generator.
Summary of the invention:
The technology that the purpose of this invention is to provide a kind of adjustable amplitude value signal generator based on DDS, it is to be that core has solved signal generator adjustable amplitude value problem with AD9850 and TLC5615.Produce comparatively desirable Wave data in the application of alternating field measuring instrument, and waveform is level and smooth, does not have obvious burr, its amplitude degree of regulation can reach 0.007V.。
In order to solve the existing problem of background technology, the present invention is by the following technical solutions: it is made up of liquid crystal display, Keyboard Control, microprocessor AT89S52, DDS signal generator AD9850, TLC5615, multiplier AD534, voltage controlled voltage source bivalent high-pass filter, second-order low-pass filter, amplifier; Liquid crystal display is connected with microprocessor AT89S52 with Keyboard Control, microprocessor AT89S52 is connected with DDS signal generator AD9850, TLC5615 is connected with microprocessor AT89S52, multiplier AD534 is connected with TLC5615 with DDS signal generator AD9850 respectively, the voltage controlled voltage source bivalent high-pass filter is connected with multiplier AD534, second-order low-pass filter is connected with the voltage controlled voltage source bivalent high-pass filter, and amplifier is connected with second-order low-pass filter.
Operation principle: being to be controller with single chip computer AT 89S52, is core with microprocessor applications technology and DDS AD9850 technology, by microprocessor control AD9850, realizes functions such as being provided with of frequency preset, control word.AD9850 realizes the signal generator function, microprocessor control D/A converter TLC5615, thereby control multiplier AD534, the adjustability of realization sinusoidal signal amplitude.
The present invention has following beneficial effect: adopt TLC5615, simplify circuit design, improve current amplitude controllable signal source circuit design, improved control precision.With AD9850 and TLC5615 is that core has solved signal generator adjustable amplitude value problem.Produce comparatively desirable Wave data in the application of alternating field measuring instrument, and waveform is level and smooth, does not have obvious burr, its amplitude degree of regulation can reach 0.007V.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the circuit diagram that signal of the present invention produces.
Embodiment:
Referring to Fig. 1-2, this embodiment by the following technical solutions: it is made up of liquid crystal display, Keyboard Control, microprocessor AT89S52, DDS signal generator AD9850, TLC5615, multiplier AD534, voltage controlled voltage source bivalent high-pass filter, second-order low-pass filter, amplifier; Liquid crystal display is connected with microprocessor AT89S52 with Keyboard Control, microprocessor AT89S52 is connected with DDS signal generator AD9850, TLC5615 is connected with microprocessor AT89S52, multiplier AD534 is connected with TLC5615 with DDS signal generator AD9850 respectively, the voltage controlled voltage source bivalent high-pass filter is connected with multiplier AD534, second-order low-pass filter is connected with the voltage controlled voltage source bivalent high-pass filter, and amplifier is connected with second-order low-pass filter.
Operation principle: being to be controller with single chip computer AT 89S52, is core with microprocessor applications technology and DDS AD9850 technology, by microprocessor control AD9850, realizes functions such as being provided with of frequency preset, control word.AD9850 realizes the signal generator function, microprocessor control D/A converter TLC5615, thereby control multiplier AD534, the adjustability of realization sinusoidal signal amplitude.
This embodiment adopts TLC5615, simplifies circuit design, improves current amplitude controllable signal source circuit design, has improved control precision.With AD9850 and TLC5615 is that core has solved signal generator adjustable amplitude value problem.Produce comparatively desirable Wave data in the application of alternating field measuring instrument, and waveform is level and smooth, does not have obvious burr, its amplitude degree of regulation can reach 0.007V.
Claims (1)
1. technology based on the adjustable amplitude value signal generator of DDS is characterized in that it is made up of liquid crystal display, Keyboard Control, microprocessor AT89S52, DDS signal generator AD9850, TLC5615, multiplier AD534, voltage controlled voltage source bivalent high-pass filter, second-order low-pass filter, amplifier; Liquid crystal display is connected with microprocessor AT89S52 with Keyboard Control, microprocessor AT89S52 is connected with DDS signal generator AD9850, TLC5615 is connected with microprocessor AT89S52, multiplier AD534 is connected with TLC5615 with DDS signal generator AD9850 respectively, the voltage controlled voltage source bivalent high-pass filter is connected with multiplier AD534, second-order low-pass filter is connected with the voltage controlled voltage source bivalent high-pass filter, and amplifier is connected with second-order low-pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910183182XA CN101989834A (en) | 2009-07-30 | 2009-07-30 | Technology of amplitude-adjustable signal generator based on direct digital frequency synthesis (DDS) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910183182XA CN101989834A (en) | 2009-07-30 | 2009-07-30 | Technology of amplitude-adjustable signal generator based on direct digital frequency synthesis (DDS) |
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| CN101989834A true CN101989834A (en) | 2011-03-23 |
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| CN200910183182XA Pending CN101989834A (en) | 2009-07-30 | 2009-07-30 | Technology of amplitude-adjustable signal generator based on direct digital frequency synthesis (DDS) |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739204A (en) * | 2012-05-16 | 2012-10-17 | 北京工业大学 | Broadband high-frequency signal injection device on 220V power line |
| CN103148846A (en) * | 2013-02-25 | 2013-06-12 | 哈尔滨工业大学 | Micromechanical gyroscope driving device based on arbitrary waveform of DDS (Direct Digital Frequency Synthesizer) |
| CN104237580A (en) * | 2013-06-07 | 2014-12-24 | 苏州普源精电科技有限公司 | Measuring device capable of generating AM amplitude-modulated signals |
| CN104458477A (en) * | 2014-12-11 | 2015-03-25 | 无锡市计量检定测试中心 | Verification method and verification device of computer data acquisition system for material testing machine |
| 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 |
| CN105137868A (en) * | 2015-09-17 | 2015-12-09 | 成都思邦力克科技有限公司 | Signal simulator |
| CN108051623A (en) * | 2017-12-18 | 2018-05-18 | 徐州亚都环境科技有限公司 | A kind of signal generator |
| CN112688671A (en) * | 2020-11-16 | 2021-04-20 | 中国计量大学 | Linear frequency modulation pulse generating device |
-
2009
- 2009-07-30 CN CN200910183182XA patent/CN101989834A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739204A (en) * | 2012-05-16 | 2012-10-17 | 北京工业大学 | Broadband high-frequency signal injection device on 220V power line |
| CN103148846A (en) * | 2013-02-25 | 2013-06-12 | 哈尔滨工业大学 | Micromechanical gyroscope driving device based on arbitrary waveform of DDS (Direct Digital Frequency Synthesizer) |
| CN103148846B (en) * | 2013-02-25 | 2015-03-18 | 哈尔滨工业大学 | Micromechanical gyroscope driving device based on arbitrary waveform of DDS (Direct Digital Frequency Synthesizer) |
| CN104237580A (en) * | 2013-06-07 | 2014-12-24 | 苏州普源精电科技有限公司 | Measuring device capable of generating AM amplitude-modulated signals |
| 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 |
| CN104458477A (en) * | 2014-12-11 | 2015-03-25 | 无锡市计量检定测试中心 | Verification method and verification device of computer data acquisition system for material testing machine |
| CN105137868A (en) * | 2015-09-17 | 2015-12-09 | 成都思邦力克科技有限公司 | Signal simulator |
| CN108051623A (en) * | 2017-12-18 | 2018-05-18 | 徐州亚都环境科技有限公司 | A kind of signal generator |
| CN112688671A (en) * | 2020-11-16 | 2021-04-20 | 中国计量大学 | Linear frequency modulation pulse generating device |
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Application publication date: 20110323 |