摘要
本文介绍了一种基于AD9850与DDS的电平振荡器信号源的研制。为了提高电平振荡器输出信号频率的稳定度和精度,用直接数字合成(direct digital synthesis,DDS)技术代替传统的锁相式频率合成法。采用具有分辨率高、频率变换快的DDS技术的芯片AD9850,通过低通滤波来实现正弦波信号源。实践结果表明:采用AD9850芯片,输出的信号频率稳定,信噪比高,满足电平振荡器输出信号的要求。
This paper introduces the design of signal generator of the Level Oscillator based on AD9850 and DDS. It shows that using the DDS （direct digital synthesis） in stead of traditional phase-locked frequency synthesis can always improve the precision and stability of output signal frequency of the Level Oscillator in this research. To upgrade the result, it designs sine wave generator by low pass filter using the DDS Chip AD9580 which has the characteristic of higher resolution and faster frequency transformation. The results show that the output signal generated by The DDS Chip AD9580 had stable frequency and high signal-to-noise ratio which can meet the necessary of output signal of level oscillation well.
出处
《国外电子测量技术》
2008年第3期40-42,共3页
Foreign Electronic Measurement Technology
关键词
直接数字合成
稳压源
AD9850
电平振荡器
direct digital synthesis （DDS）
constant voltage source
AD9850
level oscillation
