The basic principle of phase locked loop (PLL) has been introduced, and the transmission function of the phase noises of every part of PLL has been analyzed.

介绍了锁相环的基本原理，分析了锁相环各部分电路相位噪声的传递函数。

youdao

Then presented the basic structure, phase model, frequency response and performance analysis for noise and spur, of phase locked loop (PLL).

然后介绍了锁相环(PLL)的基本结构、相位模型、频率响应、噪声及杂散性能。

youdao

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。

youdao