公开(公告)号：EP1953917A1

公开(公告)日：2008-08-06

申请号：EP06817830.0

申请日：2006-11-16

申请人： Miartech, Inc.

发明人： SONG, Chaosheng ,  GOU, Gang

IPC分类号： H03L7/00

CPC分类号： H03L7/0994 ,  H03L7/085 ,  H03L2207/50

摘要： The present invention relates to an apparatus for accurately detecting a mains phase. The apparatus is constructed with a zero-crossing detector, a digital phase detector, a digital loop filter, and a digital controlled oscillator (DCO) of a direct digital synthesized (DDS) manner. The present apparatus employs an all-digital loop architecture and a high sampling clock to recover a signal with a phase orthogonal with the mains signal and a frequency the same as the mains signal. And jitters in the recovered signal are less than 10us. The present apparatus is capable of implementing signal tracking of a zero frequency error and a zero phase in a wide range, and can provide a detection result of excellent performance for the power line carrier communication, mains frequency detection, etc.

摘要翻译： 本发明涉及一种用于准确检测电源相位的装置。 该装置由零交叉检测器，数字相位检测器，数字环路滤波器和直接数字合成（DDS）方式的数字控制振荡器（DCO）构成。 本装置采用全数字环路架构和高采样时钟来恢复具有与市电信号正交的相位的信号和与市电信号相同的频率。 并且在恢复的信号中的抖动小于10us。 本装置能够在宽范围内实现零频率误差和零相位的信号跟踪，并且可以为电力线载波通信，电源频率检测等提供优异性能的检测结果。