公开(公告)号：US09172526B1

公开(公告)日：2015-10-27

申请号：US14340517

申请日：2014-07-24

Applicant: LSI Corporation

Inventor： Amaresh Malipatil ,  Sunil Srinivasa ,  Vladimir Sindalovsky ,  Mark Trafford

IPC: H04L7/04 ,  H04L7/033 ,  G06F1/10

CPC classification number: H04L7/04 ,  G06F1/10 ,  H04L7/033 ,  H04L25/03 ,  H04L25/03057

Abstract: Described embodiments provide for, in a receiver circuit, an adaptation process that adjusts the IQ-skew automatically to obtain proper eye centering in a data eye, thereby maximizing horizontal margin of the eye. The IQ-skew adaptation algorithm is realized with a ‘biased’ bang-bang phase detector (BBPD) oof a clock and data recovery circuit (CDR) that biases the weights applied to UP and DOWN outputs of the phase detector, rather than treating them equally. By weighting the BBPD UPs and DOWNs differently, the system locks to the left and right inner corners, and thereby is able to locate the center of the inner eye.

Abstract translation: 描述的实施例在接收机电路中提供自适应调整自适应IQ偏移以在数据眼中获得适当的眼睛定心，从而最大化眼睛的水平边缘。 IQ偏移自适应算法通过时钟和数据恢复电路（CDR）的“偏置”轰击相位检测器（BBPD）来实现，该电路偏置了施加到相位检测器的UP和DOWN输出的权重，而不是对它们进行处理 一样。 通过对BBPD UP和DOWN的加权不同，系统锁定到左右内角，从而能够定位内眼的中心。