基于dds技術(shù)的信號發(fā)生器的設(shè)計與實現(xiàn)

1、唐 山 學(xué) 院畢 業(yè) 設(shè) 計設(shè)計題目： 設(shè)計題目：基于 DDS 技術(shù)的信號發(fā)生器的設(shè)計與實現(xiàn)系 別： 別： 信息工程系 班 級： 級： 姓 名： 名： 指 導(dǎo) 教 師： 師： 2 0 1 2 年 6 月 10 日Design and

2、 Implementation of the Signal Generator Based on DDS TechnologyAbstractDDS is Direct Digital frequency Synthesizer (Direct Digital Synthesizer) English abbreviations. Compared with the traditional frequency synthesizer,

3、with low cost, DDS low power consumption, high resolution and fast converting speed time and so on, widely used in telecommunications and electronic instruments field, is to realize equipment full digital a key technolog

4、y. This design uses the single chip processor as the core, using a keyboard input signal parameters, control of DDS AD9850 module produce signals, the signal parameters in LCD1602 show that the complete sine signal and s

5、quare wave signal output, the output with an oscilloscope validation. DDS is A full digital frequency synthesizer, by phase accumulators, waveform ROM, D/A converter and low pass filter composition. The clock frequency a

6、fter A given, the output depends on the frequency of the signal frequency control word, the frequency resolution depends on accumulators digits, phase resolution depends on the ROM address line digits, amplitude quantiza

7、tion noise depends on the ROM data A word length and D/A converter digits. And the frequency of the traditional method than the synthesis, DDS synthesis signal has a frequency switching frequency of short time, high reso

8、lution and continuous phase changes, and many other advantages. Using single chip microcomputer control of the flexible ability and high performance, high level of integration of the AD9850 combination, can overcome the