CAJ | 학술논문

频率合成技术是目前研制信号源的关键技术．该文介绍了一种基于直接数字频率合成（DDS）技术的正弦波方波信号源设计方案。该系统采用AD9850为核心芯片，以超低功耗单片机MSP430F5438为控制芯片，可输出频率范丽为1Hz-10MHz的正弦波和方波．且具有频率设定、多档步进调整和幅度调节的功能。结果表明，该方案设计的信号源精度较高、频率范围较宽、结构简单、使用方便、输出信号频率稳定，无明显波形失真。
빈솔합성기술시목전연제신호원적관건기술．해문개소료일충기우직접수자빈솔합성（DDS）기술적정현파방파신호원설계방안。해계통채용AD9850위핵심심편，이초저공모단편궤MSP430F5438위공제심편，가수출빈솔범려위1Hz-10MHz적정현파화방파．차구유빈솔설정、다당보진조정화폭도조절적공능。결과표명，해방안설계적신호원정도교고、빈솔범위교관、결구간단、사용방편、수출신호빈솔은정，무명현파형실진。
DDS technlogy is a kind of digital frequency synthesis technology that synthesizes the wave directly from the concept of phase,e design proposat of the sine and square waveform generator,based on the ultra tow-power microcontrofler MSP430F5438 and the DDS chip AD9850 is introduced.It can provide Sine and square wave,the range of which is from 1Hz- 10MHz.The frequency can be set by the keyboard,and it can generate a step frequency signal by different steps.The amplitude of the signal also can be adjusted.Through experiments testing,it can be seen that this kind of signal generator designed has high accuracy,wide frequency, simple structure,easy to use and high reliability.The output signal has stable frequency and has no obvious distortion.