phase-locked loop detector

例句：

1. 1. The PLL detector is used to detect the frequency of a signal.
   锁相环检测器用于检测信号的频率。
2. 2.The PLL detector is crucial for maintaining accurate timing in digital systems.
   锁相环检测器对于保持数字系统中的准确定时至关重要。
3. 3.The PLL detector is commonly used in radio and microwave communication systems.
   锁相环检测器在无线电和微波通信系统中常被使用。