公开(公告)号：US20160173272A1

公开(公告)日：2016-06-16

申请号：US14568818

申请日：2014-12-12

Applicant: Analog Devices Global

Inventor： Muhammad Kalimuddin Khan ,  Kenneth J. Mulvaney

IPC: H04L7/04

CPC classification number: H04L7/04 ,  H03L7/00 ,  H03L7/07 ,  H04L7/033 ,  H04L27/00

Abstract: A clock and data recovery (CDR) system may use one or more clock signals in sync with recovered data rate. By accumulating a dithering tuning counter value at a data oversampling rate, a plurality of single bit signals at multiples of the recovered data rate and in sync with the recovered data rate can be accurately generated while utilizing the full range of the accumulator. This plurality of clock signals can be used in various modules in the CDR system and other modules in a transceiver system incorporating the CDR system.

Abstract translation: 时钟和数据恢复（CDR）系统可以使用与恢复的数据速率同步的一个或多个时钟信号。 通过以数据过采样率累积抖动调谐计数器值，可以在利用累加器的全范围的同时，以恢复的数据速率的倍数与恢复的数据速率同步的多个单比特信号被精确地产生。 该多个时钟信号可以用在CDR系统中的各种模块中以及包含CDR系统的收发机系统中的其他模块中。

公开(公告)号：US20150341161A1

公开(公告)日：2015-11-26

申请号：US14285415

申请日：2014-05-22

Applicant: Analog Devices Global

Inventor： Muhammad Kalimuddin Khan ,  Philip E. Quinlan ,  Kenneth J. Mulvaney

IPC: H04L7/033 ,  H04L27/10

CPC classification number: H04L7/033 ,  H04L7/0083 ,  H04L7/046 ,  H04L7/10 ,  H04L27/0008 ,  H04L27/10 ,  H04L27/106

Abstract: Apparatus and method for acquiring and tracking a data signal are disclosed. Two different CDR circuits are configured to acquire and track data based on two different modulation schemes. While in the acquisition mode, the first CDR circuit may acquire data signal by sampling the signal at a reduced clock rate and handover to the second CDR circuit when a preamble is found. Also in the acquisition mode, the data acquisition and tracking circuit may determine the power level of the preamble signal and dynamically adjust the threshold level for the tracking period upon finding of the preamble.

Abstract translation: 公开了用于获取和跟踪数据信号的装置和方法。 两个不同的CDR电路被配置为基于两种不同的调制方案来获取和跟踪数据。 在采集模式中，第一CDR电路可以通过以降低的时钟速率对信号进行采样来获得数据信号，并且当发现前导码时切换到第二CDR电路。 同样在采集模式中，数据采集和跟踪电路可以确定前导码信号的功率电平，并且在寻找前导码时动态地调整跟踪周期的阈值电平。