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    DIGITAL-TO-ANALOG CONVERTER (DAC) FOR DYNAMIC ADJUSTMENT OF OFF-CHIP DRIVER PULL-UP AND PULL DOWN IMPEDANCE BY PROVIDING A VARIABLE REFERENCE VOLTAGE TO HIGH FREQUENCY RECEIVER AND DRIVER CIRCUITS FOR COMMERCIAL MEMORY
    1.
    发明授权
    DIGITAL-TO-ANALOG CONVERTER (DAC) FOR DYNAMIC ADJUSTMENT OF OFF-CHIP DRIVER PULL-UP AND PULL DOWN IMPEDANCE BY PROVIDING A VARIABLE REFERENCE VOLTAGE TO HIGH FREQUENCY RECEIVER AND DRIVER CIRCUITS FOR COMMERCIAL MEMORY 失效
    数字模拟转换器（DAC）用于通过向高频接收器和商用存储器的驱动电路提供可变参考电压来动态调整脱离芯片驱动器的上拉和下拉电阻

    公开(公告)号：US06515917B2

    公开(公告)日：2003-02-04

    申请号：US09829628

    申请日：2001-04-10

    申请人： Kirk D. Lamb ,  Kevin C. Gower ,  Edward N. Cohen

    发明人： Kirk D. Lamb ,  Kevin C. Gower ,  Edward N. Cohen

    IPC分类号： G11C700

    CPC分类号： G11C5/147 ,  G11C5/04 ,  G11C5/143 ,  G11C7/04 ,  G11C7/1051 ,  G11C7/1069 ,  G11C7/1072 ,  G11C7/20 ,  G11C11/4072 ,  G11C11/4093 ,  G11C29/02 ,  G11C29/021 ,  G11C29/028 ,  G11C29/50008 ,  G11C2029/0407 ,  G11C2029/0409

    摘要： A memory subsystem package has a memory controller interface ASIC (application specific integrated circuit) and a plurality of Memory modules. The ASIC has a bi-directional serial protocol i2C communication bus to off chip drivers for monitoring temperature and for adjusting the environment surrounding the package by controlling fans using fan switches and variable voltage controls. In addition there is provided an Alternating Current Built in Self Test (AC BIST) with variable data receiver voltage reference for performing high-speed AC memory subsystem self-test for that ASIC enabling writing of pseudo-random patterns to memory, reading them back and comparing the expected results at hardware speeds. Vref can be made to vary across its allowable range during AC self test to provide improved coverage. The system monitors Vddq during normal system operation using an ADC. The system varies Vref as a function of Vddq, using a combination of a DAC and ADC. The system varies Vref as a function of Vddq, such that Vref=1/m*Vddq+OFFSET, where m can be 1, 2, 4, or 8, and where OFFSET can be positive or negative ranging from 1/n * Vddq to n−1/n*Vddq, where n is the voltage granularity of the DAC.

    摘要翻译： 存储器子系统包具有存储器控制器接口ASIC（专用集成电路）和多个存储器模块。 ASIC具有双向串行协议i2C通信总线到芯片外驱动器，用于监控温度，并通过使用风扇开关和可变电压控制控制风扇来调节封装周围的环境。 此外，还提供了具有可变数据接收器电压参考的内置自测（AC BIST）的交流电，用于为该ASIC执行高速AC存储器子系统自检，使得能够将伪随机模式写入存储器，读取它们， 在硬件速度下比较预期结果。 在AC自检期间，可以使Vref在其允许范围内变化，以提供更好的覆盖。 系统使用ADC在系统正常运行期间监视Vddq。 该系统使用DAC和ADC的组合，将Vdd变为Vddq的函数。 该系统将Vref作为Vddq的函数，使得Vref = 1 / m * Vddq + OFFSET，其中m可以是1,2,4或8，并且其中OFFSET可以是正或负范围从1 / n * Vddq 到n-1 / n * Vddq，其中n是DAC的电压粒度。

    POWER BUS CURRENT BOUNDING USING LOCAL CURRENT-LIMITING SOFT-SWITCHES AND DEVICE REQUIREMENTS INFORMATION
    4.
    发明申请
    POWER BUS CURRENT BOUNDING USING LOCAL CURRENT-LIMITING SOFT-SWITCHES AND DEVICE REQUIREMENTS INFORMATION 失效
    使用本地限流软开关的电源总线电流接线和器件要求信息

    公开(公告)号：US20110231676A1

    公开(公告)日：2011-09-22

    申请号：US12728675

    申请日：2010-03-22

    申请人： Robert G. Atkins ,  Edward N. Cohen ,  Philip M. Corcoran ,  Edward J. Seminaro

    发明人： Robert G. Atkins ,  Edward N. Cohen ,  Philip M. Corcoran ,  Edward J. Seminaro

    IPC分类号： G06F1/26 ,  H02J1/00

    CPC分类号： G06F1/3203 ,  G06F1/20 ,  Y10T307/438

    摘要： An energy management control method and controller reduce power supply current and/or subsystem cooling overhead that reduces system efficiency, may reduce system reliability and may increase ambient noise. Multiple device connectors are supplied from corresponding soft switches that are programmed to provide a current level that is sufficient to supply the maximum current for the device installed in the corresponding device connector. The current level may be determined from device information provided from the device during initialization, which may directly specify a maximum current requirement. Alternatively, the maximum current requirement can be determined from other device-identifying information such as a unique device identifier. As a result a guaranteed maximum current or power and power dissipation can be determined, and multiple power supplies and/or cooling devices such as air movement devices (AMDs) may be enabled, disabled or otherwise controlled accordingly.

    摘要翻译： 能量管理控制方法和控制器降低系统效率降低电源电流和/或子系统冷却开销，可能降低系统可靠性并可能增加环境噪声。 多个设备连接器由对应的软开关提供，编程为提供足以为安装在相应设备连接器中的设备提供最大电流的电流电平。 可以在初始化期间从设备提供的设备信息确定当前级别，其可以直接指定最大电流要求。 或者，可以从诸如唯一设备标识符的其他设备识别信息来确定最大电流要求。 因此，可以确定最大电流或功率和功率的保证，并且可以相应地启用，禁用或以其他方式控制多个电源和/或冷却装置，例如空气移动装置（AMD）。