公开(公告)号：US20040160279A1

公开(公告)日：2004-08-19

申请号：US10675810

申请日：2003-09-30

Applicant: STMicroelectronics S.A.

Inventor： Philippe Jouen ,  Michael Kraemer

IPC: H03L007/00

CPC classification number: H03L7/18 ,  H03L7/0891 ,  H03L7/099

Abstract: A phase-locked loop including an oscillator, controlled by a control signal generated by a comparison circuit comparing a reference frequency and the oscillator frequency and filtered by an integrator low-pass filter; a control and adjustment circuit for, with a predetermined frequency smaller than the reference frequency, taking into account the value of the filtered controlled signal and, if this value is out of a range of predetermined values, adjusting the operating range of the oscillator; and an inhibition circuit for deactivating the comparison circuit for a predetermined duration before taking into account the value of the filtered control signal.

Abstract translation: 一种锁相环，包括由比较电路产生的控制信号控制的振荡器，比较电路比较参考频率和振荡器频率，并由积分器低通滤波器滤波; 考虑到滤波后的受控信号的值，并且如果该值在预定值的范围之外，则调整振荡器的工作范围，该控制和调整电路具有小于参考频率的预定频率。 以及抑制电路，用于在考虑滤波后的控制信号的值之前，将比较电路停止预定的持续时间。