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。

公开(公告)号：US08848769B2

公开(公告)日：2014-09-30

申请号：US13647502

申请日：2012-10-09

Applicant: LSI Corporation

Inventor： Mohammad Mobin ,  Vladimir Sindalovsky ,  Amaresh Malipatil ,  Thomas F. Gibbons, Jr. ,  Ye Liu ,  Lane A. Smith

IPC: H04B1/38 ,  H04L5/16 ,  H04B1/40

CPC classification number: H04B1/40 ,  H04L25/03343 ,  H04L25/03885

Abstract: Embodiments of the present invention allow for adjustment of transmitter amplitude during joint transmitter (TX) and receiver (RX) equalization. During joint TX and RX adaptation, when the receiver requires a gain update, the receiver gain update is masked above or below a preset range. The RX gain update (instruction) is encoded into a transmitter amplitude update (instruction) transferred through back channel communication. The translation of RX gain to TX amplitude update is performed after the RX gain reaches a specified range. Such masking, encoding and translation reserves a certain amount RX gain range to account for RX gain variation due to process, voltage, and temperature (PVT) changes over time, and also to offer better linear equalization in the receiver over a constrained VGA bandwidth.

Abstract translation: 本发明的实施例允许在联合发射机（TX）和接收机（RX）均衡期间调整发射机幅度。 在联合TX和RX适配期间，当接收机需要增益更新时，接收机增益更新被屏蔽在高于或低于预设范围。 RX增益更新（指令）被编码成通过背信道通信传送的发送机幅度更新（指令）。 在RX增益达到指定范围后，RX增益转换为TX幅度更新。 这种屏蔽，编码和转换保留了一定量的RX增益范围，以解决随着时间的过程，电压和温度（PVT）变化引起的RX增益变化，并且还在受限的VGA带宽上在接收机中提供更好的线性均衡。

公开(公告)号：US20140098844A1

公开(公告)日：2014-04-10

申请号：US13647502

申请日：2012-10-09

Applicant: LSI Corporation

Inventor： Mohammad Mobin ,  Vladimir Sindalovsky ,  Amaresh Malipatil ,  Thomas F. Gibbons, JR. ,  Ye Liu ,  Lane A. Smith

IPC: H04B1/40

CPC classification number: H04B1/40 ,  H04L25/03343 ,  H04L25/03885

Abstract: Embodiments of the present invention allow for adjustment of transmitter amplitude during joint transmitter (TX) and receiver (RX) equalization. During joint TX and RX adaptation, when the receiver requires a gain update, the receiver gain update is masked above or below a preset range. The RX gain update (instruction) is encoded into a transmitter amplitude update (instruction) transferred through back channel communication. The translation of RX gain to TX amplitude update is performed after the RX gain reaches a specified range. Such masking, encoding and translation reserves a certain amount RX gain range to account for RX gain variation due to process, voltage, and temperature (PVT) changes over time, and also to offer better linear equalization in the receiver over a constrained VGA bandwidth.

Abstract translation: 本发明的实施例允许在联合发射机（TX）和接收机（RX）均衡期间调整发射机幅度。 在联合TX和RX适配期间，当接收机需要增益更新时，接收机增益更新被屏蔽在高于或低于预设范围。 RX增益更新（指令）被编码成通过背信道通信传送的发送机幅度更新（指令）。 在RX增益达到指定范围后，RX增益转换为TX幅度更新。 这种屏蔽，编码和转换保留了一定量的RX增益范围，以解决随着时间的过程，电压和温度（PVT）变化引起的RX增益变化，并且还在受限的VGA带宽上在接收机中提供更好的线性均衡。