The spectrum characteristics of the phase truncation error and amplitude quantization error are analyzed by the method of Fourier series.
介绍了直接数字频率合成技术以及分析其杂散误差，对相位截断误差和幅度量化误差进行了傅立叶级数分析研究。
This paper introduces the theory of the phase-locked loop (PLL) and the direct digital synthesis (DDS), a method to improve the precision of DDS and reduce its phase truncation error is also given.
介绍了锁相环(PLL)技术和直接数字式频率合成(DDS)技术的基本工作原理，给出了一种提高DDS输出频率精度及减小其相位截断误差的方法。
The phase error signal due to the phase truncation is analyzed, and the regularity of its spectral lines is obtained.
对相位舍位误差信号作了分析，得到了其频谱分布的规律。
The phase error signal due to the phase truncation is analyzed, and the regularity of its spectral lines is obtained.
对相位舍位误差信号作了分析，得到了其频谱分布的规律。
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