摘要
在分析了传统的DDS算法的基础上,提出了一种改进方案,使得系统的复杂度降低,更趋于模块化,产生的波形频率更准确。输出采用一个周期8个采样点的定点输出,系统时钟频率为80MHz,信号的谐波小于-70dB。输出信号的范围为DC到10MHz,信号频率的步长为0.1Hz,相应的转换速度为12.5ns。
Based on the analysis of traditional DDS,an optimized DDS is proposed,which can deduce the complication of system and make it modularization.The output sine wave consists of 8 fixed samples in one period is more nicety in frequency with a spectral purity of-70dB at 80MHz.The synthesize covers a bandwidth from DC to 10MHz in 0.1Hz step with a corresponding switching speed of 12.5ns.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2006年第z1期896-898,共3页
Chinese Journal of Scientific Instrument
