公开(公告)号：US09219470B1

公开(公告)日：2015-12-22

申请号：US13873817

申请日：2013-04-30

Applicant: PMC-SIERRA US, INC.

Inventor： Michael Ben Venditti

IPC: G06F1/04 ,  G06F11/00 ,  H03K3/017

CPC classification number: H03K5/1565

Abstract: A circuit and method for improving signal integrity characteristics of a non-full rate transmitter are disclosed herein. The circuit comprises an actuator block having an input for receiving a differential clock signal, the differential clock signal comprising a positive clock signal and a negative clock signal, the actuator configured to adjust a difference between the positive and negative clock signals; a sensing block, for sensing a difference between positive and negative signals of a differential signal, the differential signal being related to the clock signal; and a calibration block for providing a control signal to the actuator based on the sensed difference between the positive and negative signals.

Abstract translation: 本文公开了一种用于改善非全速率发射器的信号完整性特性的电路和方法。 所述电路包括具有用于接收差分时钟信号的输入的致动器块，所述差分时钟信号包括正时钟信号和负时钟信号，所述致动器被配置为调整所述正时钟信号和所述正时钟信号之间的差; 感测块，用于感测差分信号的正和负信号之间的差异，差分信号与时钟信号有关; 以及校准块，用于基于感测到的正和负信号的差异向致动器提供控制信号。

公开(公告)号：US08779819B1

公开(公告)日：2014-07-15

申请号：US13873639

申请日：2013-04-30

Applicant: PMC-Sierra US, Inc.

Inventor： Michael Ben Venditti

IPC: H03K5/12

CPC classification number: H03K5/086

Abstract: A method and apparatus to independently adjust the output rise and fall time of a transmitter for the purposes of improving high-speed signaling characteristics and reducing electromagnetic interference (EMI). Also described is an apparatus to provide a high-speed edge-rate control feature. The disclosed method and apparatus for rise and fall time equalization has a closed-loop calibration system that includes an actuation apparatus within the transmitter driver, a sensing means at the output of the transmitter to measure the degree of rise/fall time imbalance, and a calibration state machine operating on the sensor output to devise correction control inputs to the actuator in the transmitter driver to correct the rise/fall time imbalance. Also described is how the actuation apparatus within the transmitter driver can further be used to provide an open-loop edge-rate control feature for the transmitter.

Abstract translation: 为了改善高速信令特性和减少电磁干扰（EMI）的目的，独立地调整发射机的输出上升和下降时间的方法和装置。 还描述了提供高速边缘速率控制特征的装置。 所公开的用于上升和下降时间均衡的方法和装置具有闭环校准系统，其包括发射器驱动器内的致动装置，在发射器的输出处的感测装置，以测量上升/下降时间不平衡的程度，以及 校准状态机在传感器输出上运行，以便对变送器驱动器中的执行器设置校正控制输入，以校正上升/下降时间不平衡。 还描述了发射机驱动器内的致动装置如何可以进一步用于为发射机提供开环边缘速率控制特征。

公开(公告)号：US09071293B1

公开(公告)日：2015-06-30

申请号：US13873875

申请日：2013-04-30

Applicant: PMC-SIERRA US, INC.

Inventor： Michael Ben Venditti ,  Vadim Milirud

IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H04B1/04

CPC classification number: H04B1/0475 ,  H03K5/1565 ,  H04B1/04

Abstract: The present disclosure provides a means to adjust the relative location of output rising and falling transitions to reduce single-ended duty cycle distortion (DCD) effects in the output data stream originating from the transmitter data path. This serves to improve high-speed single-ended signal characteristics and reduce electromagnetic interference (EMI). Another feature enabled by embodiments of the present disclosure is polarity skew (also referred to as differential skew) reduction between transmitter outputs. In an embodiment, the disclosed method and apparatus for transmitter data path single-ended DCD correction describes a closed-loop calibration system including the actuation apparatus within the transmitter, a sensing block at the output of the transmitter to measure the amount of single-ended DCD, and a calibration block operating on the sensor output to devise correction control inputs to the actuator in the transmitter to correct the data path single-ended DCD present.

Abstract translation: 本公开提供了调整输出上升和下降转换的相对位置以减少源自发射机数据路径的输出数据流中的单端占空比失真（DCD）效应的手段。 这用于提高高速单端信号特性并降低电磁干扰（EMI）。 通过本公开的实施例实现的另一特征是发射机输出之间的极性偏差（也称为差分偏斜）减小。 在一个实施例中，用于发射机数据路径单端DCD校正的所公开的方法和装置描述了包括发射机内的致动装置的闭环校准系统，在发射机的输出处的感测块以测量单端 DCD，以及在传感器输出上工作的校准块，以设置发送器中执行器的校正控制输入，以校正数据路径单端DCD存在。