公开(公告)号：US07855576B1

公开(公告)日：2010-12-21

申请号：US11407444

申请日：2006-04-19

申请人： Mei Luo ,  Sergey Shumarayev ,  Thungoc M. Tran ,  Simardeep Maangat

发明人： Mei Luo ,  Sergey Shumarayev ,  Thungoc M. Tran ,  Simardeep Maangat

IPC分类号： H03K19/0175 ,  H03K19/003

CPC分类号： H03K19/017509 ,  H04L25/0276

摘要： Methods and apparatus are provided for selectively setting a CM voltage for a transceiver, reducing the effect of current mismatch, and generating a voltage step that can be used for receiver detection. A circuit of the invention can include voltage generator circuitry operable to generate a plurality of voltage signals of substantially different voltages. The circuit can also include multiplexer circuitry with voltage inputs coupled to the voltage signals. The multiplexer circuitry can be operable to select a reference signal from among the voltage inputs. In addition, the circuit can include operational amplifier (“op-amp”) circuitry with a first input coupled to the reference signal and a second input coupled to an output signal of the op-amp circuitry.

摘要翻译： 提供了用于选择性地设置收发器的CM电压的方法和装置，减少电流失配的影响，以及产生可用于接收机检测的电压步骤。 本发明的电路可以包括可操作以产生具有实质上不同电压的多个电压信号的电压发生器电路。 电路还可以包括具有耦合到电压信号的电压输入的多路复用器电路。 多路复用器电路可以用于从电压输入中选择参考信号。 此外，电路可以包括运算放大器（“运算放大器”）电路，其中耦合到参考信号的第一输入和耦合到运放电路的输出信号的第二输入。

公开(公告)号：US07777526B2

公开(公告)日：2010-08-17

申请号：US12134777

申请日：2008-06-06

申请人： Sergey Shumarayev ,  Thungoc M. Tran ,  Wilson Wong ,  Simardeep Maangat

发明人： Sergey Shumarayev ,  Thungoc M. Tran ,  Wilson Wong ,  Simardeep Maangat

IPC分类号： H03K19/094

CPC分类号： H03K19/018514 ,  H03F3/45197 ,  H03F2203/45494 ,  H03F2203/45686

摘要： Signal offset variation caused by transistor variation/mismatch in integrated circuits may be reduced. In one embodiment, a buffer circuit has variable-valued circuit elements. Offset variation measurements are made and the variable-valued circuit elements are calibrated to reduce the measured offset variation. In another embodiment, each amplifying stage of a multi-stage buffer provides variable gain. The total DC gain of the cascade is distributed unevenly across the stages, with more DC gain being provided by amplifier stages at the beginning of the cascade than at the end. An additional pre-amplifier stage can also be provided at the beginning of the cascade.

摘要翻译： 集成电路中晶体管变化/失配引起的信号偏移变化可能会降低。 在一个实施例中，缓冲电路具有可变值电路元件。 进行偏移变化测量，并校准可变值电路元件以减少测量的偏移变化。 在另一个实施例中，多级缓冲器的每个放大级提供可变增益。 级联的总直流增益不均匀地分布在整个级中，在级联开始时比放大器级提供更多的直流增益。 在级联开始时也可以提供一个额外的前级放大器级。

公开(公告)号：US07733982B2

公开(公告)日：2010-06-08

申请号：US12511022

申请日：2009-07-28

申请人： Wilson Wong ,  Rakesh H. Patel ,  Sergey Shumarayev ,  Tin H. Lai

发明人： Wilson Wong ,  Rakesh H. Patel ,  Sergey Shumarayev ,  Tin H. Lai

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04B7/005 ,  H04L25/03006 ,  H04L25/061

摘要： Systems and methods for adjusting a signal received from a communication path are disclosed. A receiver can receive a signal from a communication path which attenuates at least some frequency components of the signal. The receiver can include an equalization block that adjusts at least some of the frequency content of the received signal, a signal normalization block that provides a normalized signal amplitude and/or a normalized edge slope, and a control block. In one embodiment, the control block controls frequency adjustment in the equalization block for high frequencies but not for low frequencies. For low frequency adjustment, the control block controls the normalized signal amplitude in the signal normalization block. In this manner, controlled adjustment for low frequency content is performed in the signal normalization block.

摘要翻译： 公开了一种用于调整从通信路径接收的信号的系统和方法。 接收机可以接收来自衰减信号的至少一些频率分量的通信路径的信号。 接收机可以包括调整接收信号的频率内容中的至少一些的均衡块，提供归一化信号幅度和/或归一化边沿斜率的信号归一化块以及控制块。 在一个实施例中，控制块控制用于高频而不是低频的均衡块中的频率调整。 对于低频调整，控制块控制信号归一化块中的归一化信号幅度。 以这种方式，在信号归一化块中执行低频内容的受控调整。

公开(公告)号：US07697600B2

公开(公告)日：2010-04-13

申请号：US11182658

申请日：2005-07-14

申请人： Simardeep Maangat ,  Sergey Shumarayev ,  Wilson Wong ,  ThuNgoc Tran

发明人： Simardeep Maangat ,  Sergey Shumarayev ,  Wilson Wong ,  ThuNgoc Tran

IPC分类号： H03H7/30

CPC分类号： H04L25/03885 ,  H04B3/04 ,  H04L25/03019

摘要： Data signals transmitted over transmission media suffer from attenuation caused by the transmission media. Equalization circuitry may be provided to compensate for attenuation caused by the transmission media. Equalization circuitry may include multiple stages arranged in series to allow the frequency responses of the stages to aggregate together. Each stage may be programmable to insert a zero, which causes the frequency response of the stage to increase in magnitude by 20 dB/decade. The frequency location of the zero may also be programmable to allow each stage to contribute a certain amount of gain for a specific frequency. Each stage may also be programmable to determine the location of poles for reduction of high frequency noise and cross-talk cancellation.

摘要翻译： 通过传输介质传输的数据信号遭受由传输介质引起的衰减。 可以提供均衡电路以补偿由传输介质引起的衰减。 均衡电路可以包括串联布置的多个级，以允许级的频率响应聚合在一起。 每个级可以是可编程的，以插入一个零，这使得该级的频率响应在幅度上增加20dB /十倍。 零的频率位置也可以是可编程的，以允许每个级对特定频率贡献一定量的增益。 每个阶段也可以被编程以确定用于降低高频噪声和串扰取消的极点的位置。

公开(公告)号：US07675326B1

公开(公告)日：2010-03-09

申请号：US12163709

申请日：2008-06-27

申请人： Mei Luo ,  Sergey Shumarayev ,  Wilson Wong ,  Chong H. Lee

发明人： Mei Luo ,  Sergey Shumarayev ,  Wilson Wong ,  Chong H. Lee

IPC分类号： H03K19/094

CPC分类号： H03K19/00369 ,  H03K19/01812 ,  H03K19/01837 ,  H03K19/018514 ,  H03K19/018585

摘要： Systems and methods are provided using dynamically adjustable differential output drivers. Integrated circuits such as programmable logic devices may be provided with adjustable differential output drivers for transmitting high-speed data to other integrated circuits. The peak-to-peak output voltage and common-mode voltage of the output drivers may be adjusted. Dynamic control circuitry may be used to control the settings of current sources, programmable resistors, and voltage source circuitry in the adjustable differential output driver automatically in real time. The adjustable components in the differential output driver may be adjusted by the dynamic control circuitry based on feedback information received from the integrated circuit to which the data is transmitted.

摘要翻译： 使用动态可调差分输出驱动器提供系统和方法。 诸如可编程逻辑器件的集成电路可以设置有用于将高速数据传输到其他集成电路的可调差分输出驱动器。 可以调整输出驱动器的峰峰值输出电压和共模电压。 动态控制电路可用于实时自动控制可调差分输出驱动器中的电流源，可编程电阻和电压源电路的设置。 基于从发送数据的集成电路接收到的反馈信息，可以通过动态控制电路来调整差分输出驱动器中的可调节部件。

公开(公告)号：US07619451B1

公开(公告)日：2009-11-17

申请号：US11670971

申请日：2007-02-03

申请人： Tim Tri Hoang ,  Sergey Shumarayev ,  Kazi Asaduzzaman ,  Wanli Chang ,  Mian Z. Smith ,  Kang-Wei Lai ,  Leon Zheng

发明人： Tim Tri Hoang ,  Sergey Shumarayev ,  Kazi Asaduzzaman ,  Wanli Chang ,  Mian Z. Smith ,  Kang-Wei Lai ,  Leon Zheng

IPC分类号： H03L7/06

CPC分类号： H03L7/0995 ,  G06F1/12 ,  H03L7/081 ,  H03L7/0812

摘要： Techniques are provided for compensating for phase and timing delays in clock signals generated by phase-locked loops and delay-locked loops on integrated circuits. Circuit elements coupled in a feedback loop of a locked circuit can compensate for the timing and phase delays between an input pin and an output pin. Other circuit elements coupled in the feedback loop of a locked circuit can compensate for the delay between an input pin and a destination circuit element. Still other circuit elements coupled in an input reference path of a locked circuit preserve a timing relationship between input clock and input data signals. A clock signal and a data signal received at a destination circuit element have the same phase and timing relationship that exists between the input clock and input data signals at input pins.

摘要翻译： 提供了用于补偿由集成电路上的锁相环和延迟锁定环路产生的时钟信号中的相位和定时延迟的技术。 耦合在锁定电路的反馈回路中的电路元件可以补偿输入引脚和输出引脚之间的定时和相位延迟。 耦合在锁定电路的反馈环路中的其它电路元件可以补偿输入引脚和目的地电路元件之间的延迟。 耦合在锁定电路的输入参考路径中的其他电路元件保留输入时钟和输入数据信号之间的定时关系。 在目的地电路元件处接收的时钟信号和数据信号在输入引脚的输入时钟和输入数据信号之间具有相同的相位和定时关系。

公开(公告)号：US07616657B2

公开(公告)日：2009-11-10

申请号：US11402417

申请日：2006-04-11

申请人： Sergey Shumarayev ,  Bill W Bereza ,  Chong H Lee ,  Rakesh H Patel ,  Wilson Wong

发明人： Sergey Shumarayev ,  Bill W Bereza ,  Chong H Lee ,  Rakesh H Patel ,  Wilson Wong

IPC分类号： H04J3/00

CPC分类号： H04L5/14 ,  H03K19/17744 ,  H04L27/00

摘要： High-speed serial data transceiver circuitry on a programmable logic device (“PLD”) includes some channels that are able to operate at data rates up to a first, relatively low maximum data rate, and other channels that are able to operate at data rates up to a second, relatively high maximum data rate. The relatively low-speed channels are served by relatively low-speed phase locked loop (“PLL”) circuitry, and have other circuit components that are typically needed for handling data that is transmitted at relatively low data rates. The relatively high-speed channels are served by relatively high-speed PLLs, and have other circuit components that are typically needed for handling data that is transmitted at relatively high data rates.

摘要翻译： 可编程逻辑器件（“PLD”）上的高速串行数据收发器电路包括一些能够以高达第一，相对较低的最大数据速率的数据速率工作的通道，以及能够以数据速率操作的其他通道 达到第二个相对较高的最大数据速率。 相对低速的通道由相对低速的锁相环（“PLL”）电路服务，并且具有通常用于处理以相对低的数据速率发送的数据所需的其他电路组件。 相对高速的信道由相对高速的PLL服务，并且具有通常用于处理以相对高的数据速率传输的数据所需的其他电路部件。

公开(公告)号：US07602212B1

公开(公告)日：2009-10-13

申请号：US11904003

申请日：2007-09-24

申请人： Allen Chan ,  Sergey Shumarayev ,  Wilson Wong

发明人： Allen Chan ,  Sergey Shumarayev ,  Wilson Wong

IPC分类号： G06F7/38 ,  H03K19/173

CPC分类号： H03K19/17736 ,  H03K19/17732 ,  H03K19/17744

摘要： An integrated circuit (e.g., a programmable integrated circuit such as a programmable microcontroller, a programmable logic device, etc.) includes high-speed serial data signal interface channels, some of which include more circuitry that is dedicated to performing various high-speed serial interface functions than others of those channels have. To increase the flexibility with which such circuitry in a more feature-rich channel can be used, routing is provided for selectively allowing a less feature-rich channel to use certain dedicated circuitry of a more feature-rich channel that is not itself using all of its dedicated circuitry.

摘要翻译： 集成电路（例如，可编程集成电路，例如可编程微控制器，可编程逻辑器件等）包括高速串行数据信号接口通道，其中一些包括更多专用于执行各种高速串行数据 接口功能比其他那些通道有。 为了增加可以使用更多功能丰富的信道中的这种电路的灵活性，提供路由选择性地允许较不富有特征的信道使用更多功能丰富的信道的某些专用电路，其不是本身使用全部 其专用电路。

公开(公告)号：US07460040B1

公开(公告)日：2008-12-02

申请号：US11754670

申请日：2007-05-29

申请人： Thungoc M. Tran ,  Yu Xu ,  Kwong-Wen Wei ,  Sergey Shumarayev

发明人： Thungoc M. Tran ,  Yu Xu ,  Kwong-Wen Wei ,  Sergey Shumarayev

IPC分类号： H03M9/00

CPC分类号： H03M9/00 ,  H03K5/135 ,  H03K19/1774 ,  H03K19/17744

摘要： A high-speed serial interface for a programmable logic device includes a plurality of features to handle the various issues that may arise with data rates over 1 Gbps and particularly over 1.25 Gbps. Those features may include dynamic phase alignment to control clock-data skew, data realignment (e.g., bit slip circuitry) to account for channel-to-channel skew, full-duplex serializer and deserializer, out-of-range frequency support for low frequencies, and a soft-CDR mode.

摘要翻译： 用于可编程逻辑器件的高速串行接口包括多个特征，以处理在1Gbps，特别是超过1.25Gbps的数据速率下可能出现的各种问题。 这些特征可以包括动态相位对准以控制时钟数据偏移，数据重新对准（例如位移电路）以解决通道间通道偏移，全双工串行器和解串器，超低频率频率支持 ，和软CDR模式。

公开(公告)号：US07429897B1

公开(公告)日：2008-09-30

申请号：US11514489

申请日：2006-08-31

申请人： Tim Tri Hoang ,  Sergey Shumarayev ,  Wilson Wong

发明人： Tim Tri Hoang ,  Sergey Shumarayev ,  Wilson Wong

IPC分类号： H03B5/08

CPC分类号： H03K3/0315 ,  H03K5/133 ,  H03K2005/00202 ,  H03L7/0995 ,  H03L2207/06

摘要： Voltage controlled oscillator (VCO) circuitry with low phase noise and a wide range of operating frequencies is presented. The VCO circuitry includes circuitry with two or more VCO sub-circuits, each sub-circuit being optimized to produce output clock signals with low phase noise and with frequencies in a different range. Sub-circuits with gear inputs may be operative to produce output clock signals in a lower range of frequencies, while sub-circuits optimized for high speed operation may be used to produce output signals in a higher range of frequencies. A control circuit may be used to produce a control signal coupled to all sub-circuits. The control signal may set the operating frequency of the sub-circuits.

摘要翻译： 介绍了具有低相位噪声和宽范围工作频率的压控振荡器（VCO）电路。 VCO电路包括具有两个或多个VCO子电路的电路，每个子电路被优化以产生具有低相位噪声和频率在不同范围内的输出时钟信号。 具有齿轮输入的子电路可以用于产生在较低频率范围内的输出时钟信号，而针对高速操作优化的子电路可用于产生较高频率范围内的输出信号。 控制电路可用于产生耦合到所有子电路的控制信号。 控制信号可以设定子电路的工作频率。