公开(公告)号：US09306730B1

公开(公告)日：2016-04-05

申请号：US14613652

申请日：2015-02-04

Applicant: Xilinx, Inc.

Inventor： Guanghua Shu ,  Mohamed N. Elzeftawi ,  Ahmed M. Elkholy

IPC: H03D3/24 ,  H04L7/00 ,  H04L7/033 ,  H04L7/04 ,  H03L7/197

CPC classification number: H03L7/1974 ,  H03L7/0807 ,  H03L7/081 ,  H03L7/0814 ,  H03L7/093 ,  H03L7/1976 ,  H03L2207/06 ,  H04J3/0685 ,  H04L7/0008 ,  H04L7/033 ,  H04L7/0331 ,  H04L25/14

Abstract: An apparatus relates generally to clock and data recovery. A fractional-N phase-locked loop is for receiving a reference signal, and for providing a proportional signal and an integral signal. A ring oscillator of the fractional-N phase-locked loop is for receiving the proportional signal and the integral signal, and for providing an oscillation signal at a clock frequency substantially greater than a reference frequency of the reference signal. A data-to-frequency control word converter is for receiving data input and the oscillation signal, and for providing a frequency control word. A fractional-N divider of the fractional-N phase-locked loop is for receiving the frequency control word and the oscillation signal, and for providing a feedback clock signal to a phase-frequency detector of the fractional-N phase-locked loop. The phase-frequency detector is for receiving the reference signal and the feedback clock signal, and for adjusting a phase and frequency of the oscillation signal.

Abstract translation: 一种装置一般涉及时钟和数据恢复。 小数N锁相环用于接收参考信号，并用于提供比例信号和积分信号。 分数N锁相环的环形振荡器用于接收比例信号和积分信号，并用于以基本上大于参考信号的参考频率的时钟频率提供振荡信号。 数据到频率控制字转换器用于接收数据输入和振荡信号，并用于提供频率控制字。 分数N锁相环的分数N分频器用于接收频率控制字和振荡信号，并将反馈时钟信号提供给分数N锁相环的相位检波器。 相位检测器用于接收参考信号和反馈时钟信号，并用于调整振荡信号的相位和频率。