公开(公告)号：US09705665B2

公开(公告)日：2017-07-11

申请号：US15009696

申请日：2016-01-28

Applicant: STMicroelectronics International N.V.

Inventor： Abhishek Chowdhary ,  Vivek Uppal ,  Alok Kaushik ,  Sajal Kumar Mandal ,  Tapas Nandy ,  Sanjeev Chopra

IPC: H04L12/26 ,  H04L7/033 ,  H04L7/00 ,  H03L7/08 ,  H04L25/03 ,  H03L7/091

CPC classification number: H04L7/0087 ,  H03L7/0807 ,  H03L7/091 ,  H04L7/0004 ,  H04L7/005 ,  H04L7/033 ,  H04L7/0331 ,  H04L7/0338 ,  H04L25/03057 ,  H04L43/022

Abstract: A method, algorithm, architecture, circuit and/or system that compensates for frequency difference in oversampled CDRs. The oversampled CDR uses a programmable divider whose division ratio is changed, for one or more cycles, from its usual division ratio, when accumulated phase movement in either direction exceeds a threshold. Accordingly, the elasticity buffer in oversampled CDRs can be made much smaller or entirely eliminated, resulting in less area, and reduced or eliminated dependence of max allowed burst size on ppm difference. The threshold can be kept programmable, and more than half unit interval, to provide robustness towards high frequency jitter.

公开(公告)号：US20150280898A1

公开(公告)日：2015-10-01

申请号：US14231499

申请日：2014-03-31

Applicant: STMicroelectronics International N.V.

Inventor： Abhishek Chowdhary ,  Vivek Uppal ,  Alok Kaushik ,  Sajal Kumar Mandal ,  Tapas Nandy ,  Sanjeev Chopra

IPC: H04L7/00 ,  H04L7/033 ,  H03L7/091

CPC classification number: H04L7/0087 ,  H03L7/0807 ,  H03L7/091 ,  H04L7/0004 ,  H04L7/005 ,  H04L7/033 ,  H04L7/0331 ,  H04L7/0338 ,  H04L25/03057 ,  H04L43/022

Abstract: A method, algorithm, architecture, circuit and/or system that compensates for frequency difference in oversampled CDRs. The oversampled CDR uses a programmable divider whose division ratio is changed, for one or more cycles, from its usual division ratio, when accumulated phase movement in either direction exceeds a threshold. Accordingly, the elasticity buffer in oversampled CDRs can be made much smaller or entirely eliminated, resulting in less area, and reduced or eliminated dependence of max allowed burst size on ppm difference. The threshold can be kept programmable, and more than half unit interval, to provide robustness towards high frequency jitter.

Abstract translation: 补偿过采样CDR中的频率差的方法，算法，架构，电路和/或系统。 过采样的CDR使用可编程分频器，其分频比从其通常的分频比改变一个或多个周期，当任一方向上的累积相位移动超过阈值时。 因此，过采样CDR中的弹性缓冲器可以被制造得更小或完全消除，导致较少的面积，并且减少或消除了最大允许突发尺寸对ppm差的依赖性。 门限可以保持可编程，并且超过一半单位间隔，以提供对高频抖动的鲁棒性。

公开(公告)号：US09832008B2

公开(公告)日：2017-11-28

申请号：US14986152

申请日：2015-12-31

Applicant: STMicroelectronics International N.V.

Inventor： Abhishek Chowdhary ,  Vivek Uppal ,  Alok Kaushik ,  Sajal Kumar Mandal ,  Tapas Nandy ,  Sanjeev Chopra

IPC: H04L7/00 ,  H04L7/08 ,  H04L7/033 ,  H03L7/08 ,  H04L12/26 ,  H04L25/03 ,  H03L7/091

CPC classification number: H04L7/0087 ,  H03L7/0807 ,  H03L7/091 ,  H04L7/0004 ,  H04L7/005 ,  H04L7/033 ,  H04L7/0331 ,  H04L7/0338 ,  H04L25/03057 ,  H04L43/022

Abstract: A method, algorithm, architecture, circuit and/or system that compensates for frequency difference in oversampled CDRs. The oversampled CDR uses a programmable divider whose division ratio is changed, for one or more cycles, from its usual division ratio, when accumulated phase movement in either direction exceeds a threshold. Accordingly, the elasticity buffer in oversampled CDRs can be made much smaller or entirely eliminated, resulting in less area, and reduced or eliminated dependence of max allowed burst size on ppm difference. The threshold can be kept programmable, and more than half unit interval, to provide robustness towards high frequency jitter.

公开(公告)号：US09356770B2

公开(公告)日：2016-05-31

申请号：US14231499

申请日：2014-03-31

Applicant: STMicroelectronics International N.V.

Inventor： Abhishek Chowdhary ,  Vivek Uppal ,  Alok Kaushik ,  Sajal Kumar Mandal ,  Tapas Nandy ,  Sanjeev Chopra

IPC: H04L7/00 ,  H04L7/033 ,  H03L7/091 ,  H04L25/03

CPC classification number: H04L7/0087 ,  H03L7/0807 ,  H03L7/091 ,  H04L7/0004 ,  H04L7/005 ,  H04L7/033 ,  H04L7/0331 ,  H04L7/0338 ,  H04L25/03057 ,  H04L43/022

Abstract: A method, algorithm, architecture, circuit and/or system that compensates for frequency difference in oversampled CDRs. The oversampled CDR uses a programmable divider whose division ratio is changed, for one or more cycles, from its usual division ratio, when accumulated phase movement in either direction exceeds a threshold. Accordingly, the elasticity buffer in oversampled CDRs can be made much smaller or entirely eliminated, resulting in less area, and reduced or eliminated dependence of max allowed burst size on ppm difference. The threshold can be kept programmable, and more than half unit interval, to provide robustness towards high frequency jitter.

Abstract translation: 补偿过采样CDR中的频率差的方法，算法，架构，电路和/或系统。 过采样的CDR使用可编程分频器，其分频比从其通常的分频比改变一个或多个周期，当任一方向上的累积相位移动超过阈值时。 因此，过采样CDR中的弹性缓冲器可以被制造得更小或完全消除，导致较少的面积，并且减少或消除了最大允许突发尺寸对ppm差的依赖性。 门限可以保持可编程，并且超过一半单位间隔，以提供对高频抖动的鲁棒性。