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    METHODS AND SYTEMS TO DETECT VOLTAGE CHANGES WITHIN INTEGRATED CIRCUITS
    3.
    发明申请
    METHODS AND SYTEMS TO DETECT VOLTAGE CHANGES WITHIN INTEGRATED CIRCUITS 有权
    在集成电路中检测电压变化的方法和动作

    公开(公告)号：US20110074398A1

    公开(公告)日：2011-03-31

    申请号：US12566956

    申请日：2009-09-25

    申请人： Aaron M. Barton ,  James S. Ignowski ,  Pablo Lopez ,  Mondira Pant ,  Rex Petersen ,  Robert Rose ,  Sean Welch

    发明人： Aaron M. Barton ,  James S. Ignowski ,  Pablo Lopez ,  Mondira Pant ,  Rex Petersen ,  Robert Rose ,  Sean Welch

    IPC分类号： G01R19/17

    CPC分类号： G01R19/16552 ,  G01R19/0084 ,  G01R19/252

    摘要： Methods and systems to detect droop events on-chip, which may include a sensor circuit located adjacent to a voltage node to convert a corresponding voltage to a digital count or value indicative of the voltage. The sensor circuit may include an n-stage ring oscillator and an asynchronous counter. The sensor circuit may include circuitry to capture and convert a phase associated with a count to a binary fractional value to increase voltage resolution. Multiple counts associated with the node may be evaluated at the node to identify minimum and maximum counts and corresponding time stamps. More complex evaluation and control circuitry may be shared amongst a plurality of sensor circuits and may include circuitry to generate and compare counts to one or more variable thresholds, circuitry to average counts over time, and memory to store state values associated with the sensors.

    摘要翻译： 检测片上下垂事件的方法和系统，其可以包括位于电压节点附近的传感器电路，以将相应的电压转换为指示电压的数字计数或值。 传感器电路可以包括n级环形振荡器和异步计数器。 传感器电路可以包括用于捕获并将与计数相关联的相位转换成二进制分数值以增加电压分辨率的电路。 可以在节点处评估与节点相关联的多个计数，以识别最小和最大计数以及相应的时间戳。 可以在多个传感器电路之间共享更复杂的评估和控制电路，并且可以包括用于生成和比较与一个或多个可变阈值的计数，用于平均随时间的计数的电路以及用于存储与传感器相关联的状态值的存储器的电路。

    Power reduction technique for current mode digital-to-analog converters
    4.
    发明授权
    Power reduction technique for current mode digital-to-analog converters 失效
    电流模式数模转换器的功耗缩减技术

    公开(公告)号：US5635935A

    公开(公告)日：1997-06-03

    申请号：US522011

    申请日：1995-08-31

    申请人： James S. Ignowski ,  Hugh Wallace ,  Stuart A. Bell

    发明人： James S. Ignowski ,  Hugh Wallace ,  Stuart A. Bell

    IPC分类号： H03M1/66 ,  H03M1/00 ,  H03M1/74

    CPC分类号： H03M1/002 ,  H03M1/742

    摘要： A video DAC for driving video displays with reduced power dissipation is presented. This is accomplished using a dual driver circuit connected to a current mirror, the dual driver comprising a strong driver and a weak driver. The dual driver permits switching current between the video load and a dummy load. The current to the dummy load is disabled during periods when the video signal remains steady for a predetermined period of time. The dual driver, using the weak driver, disables the current to the dummy load during video blanking and synchronization periods. This scheme substantially reduces the power dissipation in the DAC.

    摘要翻译： 提出了一种用于驱动具有降低功耗的视频显示的视频DAC。 这是使用连接到电流镜的双驱动器电路实现的，双驱动器包括强驱动器和弱驱动器。 双驱动器允许在视频负载和虚拟负载之间切换电流。 在视频信号保持稳定一段预定时间段期间，禁止对虚拟负载的电流。 使用弱驱动器的双驱动器在视频消隐和同步期间禁用当前的虚拟负载。 该方案大大降低了DAC中的功耗。

    Methods and systems to detect voltage changes within integrated circuits
    5.
    发明授权
    Methods and systems to detect voltage changes within integrated circuits 有权
    检测集成电路电压变化的方法和系统

    公开(公告)号：US08368385B2

    公开(公告)日：2013-02-05

    申请号：US12566956

    申请日：2009-09-25

    申请人： Aaron M. Barton ,  James S. Ignowski ,  Pablo Lopez ,  Mondira Pant ,  Rex Petersen ,  Robert Rose ,  Sean Welch

    发明人： Aaron M. Barton ,  James S. Ignowski ,  Pablo Lopez ,  Mondira Pant ,  Rex Petersen ,  Robert Rose ,  Sean Welch

    IPC分类号： G01R19/14 ,  G01R31/3187

    CPC分类号： G01R19/16552 ,  G01R19/0084 ,  G01R19/252

    摘要： Methods and systems to detect droop events on-chip, which may include a sensor circuit located adjacent to a voltage node to convert a corresponding voltage to a digital count or value indicative of the voltage. The sensor circuit may include an n-stage ring oscillator and an asynchronous counter. The sensor circuit may include circuitry to capture and convert a phase associated with a count to a binary fractional value to increase voltage resolution. Multiple counts associated with the node may be evaluated at the node to identify minimum and maximum counts and corresponding time stamps. More complex evaluation and control circuitry may be shared amongst a plurality of sensor circuits and may include circuitry to generate and compare counts to one or more variable thresholds, circuitry to average counts over time, and memory to store state values associated with the sensors.

    摘要翻译： 检测片上下垂事件的方法和系统，其可以包括位于电压节点附近的传感器电路，以将相应的电压转换为指示电压的数字计数或值。 传感器电路可以包括n级环形振荡器和异步计数器。 传感器电路可以包括用于捕获并将与计数相关联的相位转换成二进制分数值以增加电压分辨率的电路。 可以在节点处评估与节点相关联的多个计数，以识别最小和最大计数以及相应的时间戳。 可以在多个传感器电路之间共享更复杂的评估和控制电路，并且可以包括用于生成和比较与一个或多个可变阈值的计数，用于平均随时间的计数的电路以及用于存储与传感器相关联的状态值的存储器的电路。

    Method and system for calibration of a voltage controlled oscillator (VCO)
    6.
    发明授权
    Method and system for calibration of a voltage controlled oscillator (VCO) 失效
    压控振荡器（VCO）的校准方法和系统

    公开(公告)号：US07091796B2

    公开(公告)日：2006-08-15

    申请号：US10644559

    申请日：2003-08-20

    申请人： Christopher J. Bostak ,  Samuel D. Naffziger ,  Christopher A. Poirier ,  James S. Ignowski

    发明人： Christopher J. Bostak ,  Samuel D. Naffziger ,  Christopher A. Poirier ,  James S. Ignowski

    IPC分类号： H03B5/04

    CPC分类号： G01R35/005 ,  H03M1/1038 ,  H03M1/60

    摘要： A method for calibrating a voltage controlled oscillator (VCO) comprising applying a plurality of known voltages to the input of a VCO, monitoring, for each of the voltages, an output count from the VCO over a set interval, and storing the output counts for each voltage. Also disclosed is a system for calibrating a voltage controlled oscillator (VCO) comprising a plurality of known voltages, wherein the known voltage are connectable to the VCO, and a controller coupled to the output of the VCO, wherein the controller maintains a calibration table of VCO output counts for selected voltage inputs.

    摘要翻译： 一种用于校准压控振荡器（VCO）的方法，包括将多个已知电压施加到VCO的输入端，对于每个电压，在设定的间隔内监视来自VCO的输出计数，并将输出计数存储在 每个电压。 还公开了一种用于校准包括多个已知电压的压控振荡器（VCO）的系统，其中已知电压可连接到VCO，以及耦合到VCO的输出的控制器，其中控制器保持校准表 所选电压输入的VCO输出计数。

    Circuits for realizing an optical isolator
    7.
    发明授权
    Circuits for realizing an optical isolator 失效
    用于实现光隔离器的电路

    公开(公告)号：US5061859A

    公开(公告)日：1991-10-29

    申请号：US406799

    申请日：1989-09-13

    申请人： Ralph E. Lovelace ,  David J. Gampell ,  James S. Ignowski

    发明人： Ralph E. Lovelace ,  David J. Gampell ,  James S. Ignowski

    IPC分类号： H03K17/78 ,  H01L31/167 ,  H03K17/04 ,  H04B10/00

    CPC分类号： H04B10/802 ,  H01L31/167

    摘要： An optical transmitter/receiver pair has an integrated CMOS circuit that provides a current flow to a pre-biased solid state light emitting device (LED) in response to the presence or absence of a digital input signal. The current flow is augmented at the rising and falling edges of the input signal to enhance turn-on and turn-off speed of the LED. The LED is optically coupled to a photodiode that produces a current flow in response to illumination. The photodiode is shielded from spurious electronic noise by a transparent shield and the output of the photodiode is amplified to produce an output voltage, which is connected to a capacitively delayed voltage divider. The voltage divider generates a time delayed threshold voltage connectable along with the output voltage to the inputs of a comparator.

    摘要翻译： 光发射机/接收机对具有集成CMOS电路，其响应于数字输入信号的存在或不存在而向预偏置固态发光器件（LED）提供电流。 电流在输入信号的上升沿和下降沿增加，以提高LED的开启和关闭速度。 LED光耦合到光电二极管，其响应于照明而产生电流。 光电二极管通过透明屏蔽屏蔽杂散电子噪声，并且光电二极管的输出被放大，以产生连接到电容延迟分压器的输出电压。 分压器产生可延迟的阈值电压以及输出电压到比较器的输入端。