公开(公告)号：US08253405B2

公开(公告)日：2012-08-28

申请号：US12347711

申请日：2008-12-31

申请人： Malay Trivedi ,  Jiang William ,  Brent D. Thomas ,  James T. Doyle ,  Rose Wang

发明人： Malay Trivedi ,  Jiang William ,  Brent D. Thomas ,  James T. Doyle ,  Rose Wang

IPC分类号： G05F1/00

CPC分类号： G06F1/26

摘要： In general, in one aspect, the disclosure describes a high-speed multi-phase voltage regulator (VR) capable of sensing load current. For each phase leg, the VR includes a current mirror to mirror current in switching elements, a current sense to sense high side current in the current mirror, and a I-V converter to convert the sensed high side current to a voltage. The high side sensed current for each phase leg is averaged and the duty cycle for the VR is extracted. The average high side sensed current and the duty cycle are converted to digital by an A-D converter. Digital circuitry corrects the sensed current by adjusting for the gain and offset voltage of the VR. The adjusted sensed value is divided by the duty cycle to convert to load current and the average load current is multiplied by the number of phases operating to determine overall load current.

摘要翻译： 通常，一方面，本公开描述了能够感测负载电流的高速多相电压调节器（VR）。 对于每个相支路，VR包括用于在开关元件中镜像电流的电流镜，用于感测电流镜中的高侧电流的电流感测，以及将感测到的高侧电流转换为电压的I-V转换器。 对每个相位支路的高侧检测电流进行平均，并提取VR的占空比。 平均高侧检测电流和占空比由A-D转换器转换为数字。 数字电路通过调整VR的增益和失调电压来校正感测电流。 调整后的感测值除以占空比转换为负载电流，平均负载电流乘以确定总负载电流的相位数。

公开(公告)号：US20100164477A1

公开(公告)日：2010-07-01

申请号：US12347711

申请日：2008-12-31

申请人： Malay Trivedi ,  Jiang William ,  Brent D. Thomas ,  James T. Doyle ,  Rose Wang

发明人： Malay Trivedi ,  Jiang William ,  Brent D. Thomas ,  James T. Doyle ,  Rose Wang

IPC分类号： G01R19/00 ,  G05F1/10

CPC分类号： G06F1/26

摘要： In general, in one aspect, the disclosure describes a high-speed multi-phase voltage regulator (VR) capable of sensing load current. For each phase leg, the VR includes a current mirror to mirror current in switching elements, a current sense to sense high side current in the current mirror, and a I-V converter to convert the sensed high side current to a voltage. The high side sensed current for each phase leg is averaged and the duty cycle for the VR is extracted. The average high side sensed current and the duty cycle are converted to digital by an A-D converter. Digital circuitry corrects the sensed current by adjusting for the gain and offset voltage of the VR. The adjusted sensed value is divided by the duty cycle to convert to load current and the average load current is multiplied by the number of phases operating to determine overall load current.

摘要翻译： 通常，一方面，本公开描述了能够感测负载电流的高速多相电压调节器（VR）。 对于每个相支路，VR包括用于在开关元件中镜像电流的电流镜，用于感测电流镜中的高侧电流的电流感测，以及将感测到的高侧电流转换为电压的I-V转换器。 对每个相位支路的高侧检测电流进行平均，并提取VR的占空比。 平均高侧检测电流和占空比由A-D转换器转换为数字。 数字电路通过调整VR的增益和失调电压来校正感测电流。 调整后的感测值除以占空比转换为负载电流，平均负载电流乘以确定总负载电流的相位数。

公开(公告)号：US20100164622A1

公开(公告)日：2010-07-01

申请号：US12347081

申请日：2008-12-31

申请人： Fuding Ge ,  Brent D. Thomas ,  Malay Trivedi ,  James T. Doyle

发明人： Fuding Ge ,  Brent D. Thomas ,  Malay Trivedi ,  James T. Doyle

IPC分类号： H03F3/45

CPC分类号： H03F3/005 ,  H03F3/45475

摘要： Methods and systems to amplify and convert a single-ended analog signal to a differential signal and to convert the differential signal to a digital value, including to time-multiplex a plurality of windowed single-ended analog error signals, amplify a difference between the time-multiplexed analog signals, sample a corresponding amplified difference signal and an inverted amplified difference signal, amplify and center the samples about a common mode, and convert a corresponding amplified differential signal to digital values in a pipeline fashion. Bias adjustable features may be implemented to control a bandwidth, and clock rates may be adjustable to correspond to the bandwidth.

摘要翻译： 将单端模拟信号放大并转换为差分信号并将差分信号转换为数字值的方法和系统，包括对多个窗口化的单端模拟误差信号进行时间复用，放大时间差 多路复用模拟信号，对相应的放大差分信号和反相放大差分信号进行采样，对共模进行放大和中心采样，并以相应的方式将相应的放大差分信号转换为数字值。 可以实施偏置可调特征以控制带宽，并且时钟速率可以是可调节的以对应于带宽。

公开(公告)号：US07852252B2

公开(公告)日：2010-12-14

申请号：US12347081

申请日：2008-12-31

申请人： Fuding Ge ,  Brent D. Thomas ,  Malay Trivedi ,  James T. Doyle

发明人： Fuding Ge ,  Brent D. Thomas ,  Malay Trivedi ,  James T. Doyle

IPC分类号： H03M1/12

CPC分类号： H03F3/005 ,  H03F3/45475

摘要： Methods and systems to amplify and convert a single-ended analog signal to a differential signal and to convert the differential signal to a digital value, including to time-multiplex a plurality of windowed single-ended analog error signals, amplify a difference between the time-multiplexed analog signals, sample a corresponding amplified difference signal and an inverted amplified difference signal, amplify and center the samples about a common mode, and convert a corresponding amplified differential signal to digital values in a pipeline fashion. Bias adjustable features may be implemented to control a bandwidth, and clock rates may be adjustable to correspond to the bandwidth.

摘要翻译： 将单端模拟信号放大并转换为差分信号并将差分信号转换为数字值的方法和系统，包括对多个窗口化的单端模拟误差信号进行时间复用，放大时间差 多路复用模拟信号，对相应的放大差分信号和反相放大差分信号进行采样，对共模进行放大和中心采样，并以相应的方式将相应的放大差分信号转换为数字值。 可以实施偏置可调特征以控制带宽，并且时钟速率可以是可调节的以对应于带宽。

公开(公告)号：US06525769B1

公开(公告)日：2003-02-25

申请号：US09223130

申请日：1998-12-30

申请人： Brent D. Thomas ,  Morteza Afghahi

发明人： Brent D. Thomas ,  Morteza Afghahi

IPC分类号： H04N964

CPC分类号： H04N5/361

摘要： An imaging device includes a compensation circuit for reducing an effect of dark current generated during operation. The compensation circuit calculates an initial dark current offset value using optically dark regions of a photo sensitive array. The compensation circuit also automatically adjusts the initial dark current offset value as output signals from successive rows of the photo sensitive array are transferred. The compensation circuit can calculate the initial dark current offset value each time an image is captured, thereby compensating for variables such as temperature.

摘要翻译： 成像装置包括用于减少在操作期间产生的暗电流的影响的补偿电路。 补偿电路使用光敏阵列的光学暗区来计算初始暗电流偏移值。 当传输来自感光阵列的连续行的输出信号时，补偿电路还自动调整初始暗电流偏移值。 每次拍摄图像时，补偿电路可以计算初始暗电流偏移值，从而补偿诸如温度的变量。

公开(公告)号：US06327389B1

公开(公告)日：2001-12-04

申请号：US09120496

申请日：1998-07-21

申请人： Brent D. Thomas

发明人： Brent D. Thomas

IPC分类号： G06K994

CPC分类号： H04N5/374 ,  H04N5/357

摘要： A photosensing circuit, system and method. The photosensing circuit includes a photodetector and a network coupled to the photodetector. The network includes a plurality of elements and at least a first and second output terminals, the elements of the network being selected such that a difference of signals flowing out of the first and second output terminals is directly proportional to an amount of light impinging on the photodetector and is substantially free of electrical noise.

摘要翻译： 光感电路，系统及方法。 光敏电路包括光电检测器和耦合到光电检测器的网络。 网络包括多个元件和至少第一和第二输出端子，网络的元件被选择为使得从第一和第二输出端子流出的信号的差异与照射在第一和第二输出端子上的光量成正比 光电检测器并且基本上没有电噪声。

公开(公告)号：US06850652B1

公开(公告)日：2005-02-01

申请号：US09656973

申请日：2000-09-07

申请人： Brent D. Thomas ,  Christine C. Thomas

发明人： Brent D. Thomas ,  Christine C. Thomas

IPC分类号： G06K7/10 ,  G09B21/00 ,  G06K7/00

CPC分类号： G06K7/10891 ,  G09B21/00

摘要： A tactile kinesthetic assistant is a device that allows a person to use the senses of sight, touch and hearing to gather information. Tactile kinesthetic assistants can be used, for example, to help a person retrieve information related to a specific word or phrase (e.g., a student learning to read), to allow a person to determine the status of a person or thing (e.g., a nurse retrieving medical records), to allow a person to obtain current information (e.g., a stock broker retrieving stock prices). In one embodiment, a tactile kinesthetic assistant includes a thimble and an ear piece. The thimble includes a scanner that allows the user to scan one or more words. The representations of the one or more words are used to retrieve information via a network and the retrieved information is provided to the user through an ear piece.

摘要翻译： 一种触觉动觉助手是允许一个人使用视觉，触觉和听觉来收集信息的装置。 可以使用触觉激动助剂，例如帮助人们检索与特定单词或短语相关的信息（例如，学生学习阅读），以允许一个人确定人或事物的状态（例如， 护士检索医疗记录），以允许一个人获取当前信息（例如股票经纪人检索股票价格）。 在一个实施例中，触觉动觉助理包括套管和耳机。 套管包括允许用户扫描一个或多个单词的扫描器。 一个或多个单词的表示用于通过网络检索信息，并且通过耳机将检索到的信息提供给用户。