Improved phase detector for electro-optical phase-locked loops
Improved phase detector for electro-optical phase-locked loops
复制标题
改进的电光锁相环相位检测器
DOI：
10.1049/el:20080069
复制
发表时间：
2008
影响因子：
1.1
通讯作者：
M. Vidmar
中科院分区：
文献类型：
--
作者：
L. Naglič;L. Pavlovič;B. Batagelj;M. Vidmar
一个相位检测器与减少杂散输出已经实现。由于在电光锁相环（PLL）中的相位检测器的输出处的杂散产物难以被滤除，因此这种相位检测器被推荐用于这样的应用。从理论上提出了两个常规鉴相器（双平衡混频器或快速逻辑异或门）的并行工作，并通过实际实验进行了验证。在两个相位检测器之间保持90°的相移，可以显著降低两倍于比较频率的杂散输出，从而使电光PLL合成器的输出频谱更干净。
A phase detector with a reduced spurious output has been realised. Since spurious products at the output of a phase detector in an electro-optical phase-locked loop (PLL) can hardly be filtered out, this kind of a phase detector is recommended for such an application. The parallel operation of two conventional phase detectors (double-balanced mixers or fast-logic EXOR gates) is presented theoretically and then verified with a practical experiment. Maintaining a phase shift of 90° between the two phase detectors, the spurious output at twice the comparing frequency can be reduced significantly, resulting in a much cleaner output spectrum of the electro-optical PLL synthesiser.