Digitally controlled impedance for I/O of an integrated circuit device
    11.
    发明授权
    Digitally controlled impedance for I/O of an integrated circuit device 有权
    用于集成电路器件的I / O的数字控制阻抗

    公开(公告)号:US06489837B2

    公开(公告)日:2002-12-03

    申请号:US10007167

    申请日:2001-11-30

    IPC分类号: G05F110

    摘要: A system for controlling the impedances of circuits on an integrated circuit chip is provided. At least one circuit is selected to operate as a p-channel reference circuit, and at least one circuit is selected to operate as an n-channel reference circuit. Other circuits are selected to operate as circuits and/or line termination circuits. A digitally controlled impedance (DCI) circuit controls the p-channel reference circuit to determine a desired configuration of p-channel transistors for use in the circuits. The DCI circuit further controls the n-channel reference circuit to determine a desired configuration of n-channel transistors for use in the circuits. The DCI circuit takes into account such factors as resistances of p-channel transistors in the p-channel reference circuit, resistances of n-channel transistors in the n-channel reference circuit, as well as temperature, voltage and process variations. The DCI circuit relays information identifying the desired configurations of the n-channel and p-channel transistors to the circuits. The circuits are then configured in response to this information.

    摘要翻译: 提供一种用于控制集成电路芯片上的电路的阻抗的系统。 选择至少一个电路作为p沟道参考电路工作,并且选择至少一个电路作为n沟道参考电路进行工作。 选择其他电路用作电路和/或线路终端电路。 数字控制阻抗(DCI)电路控制p沟道参考电路以确定用于电路中的p沟道晶体管的期望配置。 DCI电路进一步控制n沟道参考电路以确定在电路中使用的n沟道晶体管的期望配置。 DCI电路考虑了p沟道参考电路中p沟道晶体管的电阻,n沟道参考电路中n沟道晶体管的电阻以及温度,电压和工艺变化等因素。 DCI电路将识别n沟道和p沟道晶体管的期望配置的信息中继到电路。 然后响应于该信息配置电路。

    Digitally controlled impedance for I/O of an integrated circuit device

    公开(公告)号:US06445245B1

    公开(公告)日:2002-09-03

    申请号:US09684539

    申请日:2000-10-06

    IPC分类号: G05F110

    摘要: A system for controlling the impedances of circuits on an integrated circuit chip is provided. At least one circuit is selected to operate as a p-channel reference circuit, and at least one circuit is selected to operate as an n-channel reference circuit. Other circuits are selected to operate as circuits and/or line termination circuits. A digitally controlled impedance (DCI) circuit controls the p-channel reference circuit to determine a desired configuration of p-channel transistors for use in the circuits. The DCI circuit further controls the n-channel reference circuit to determine a desired configuration of n-channel transistors for use in the circuits. The DCI circuit takes into account such factors as resistances of p-channel transistors in the p-channel reference circuit, resistances of n-channel transistors in the n-channel reference circuit, as well as temperature, voltage and process variations. The DCI circuit relays information identifying the desired configurations of the n-channel and p-channel transistors to the circuits. The circuits are then configured in response to this information.

    Measurement of the resin content of a composite material by nuclear
magnetic resonance
    14.
    发明授权
    Measurement of the resin content of a composite material by nuclear magnetic resonance 失效
    通过核磁共振测定复合材料的树脂含量

    公开(公告)号:US5818228A

    公开(公告)日:1998-10-06

    申请号:US848535

    申请日:1997-04-28

    IPC分类号: G01R33/44 G01V3/00

    CPC分类号: G01R33/44 G01N24/085

    摘要: The resin content of an organic resin-matrix composite material is measured nondestructively by nuclear magnetic resonance. A specimen of the composite material is placed into a constant magnetic field and subjected to a radio-frequency magnetic field pulse. The response of the material is indicative of the amount of organic resin that is present. The response may be used as a feedback signal to control the operation of a manufacturing machine.

    摘要翻译: 有机树脂基复合材料的树脂含量通过核磁共振无损检测。 将复合材料的样品置于恒定磁场中并进行射频磁场脉冲。 材料的响应表示存在的有机树脂的量。 响应可以用作反馈信号以控制制造机器的操作。

    Programmable logic bias driver
    15.
    发明授权
    Programmable logic bias driver 失效
    可编程逻辑偏置驱动器

    公开(公告)号:US5654665A

    公开(公告)日:1997-08-05

    申请号:US444111

    申请日:1995-05-18

    IPC分类号: G05F3/20 G05F3/26 G05F3/02

    CPC分类号: G05F3/205 G05F3/267

    摘要: A biasing system for a differential amplifier includes an NMOS current source and a gate bias voltage generator. The gate bias voltage generator produces a bias voltage VNCS to control the NMOS current source. The gate bias generator includes a reference current generator to produce a reference current relatively independent of supply voltage variations. A temperature compensator regulates the reference current to provide a temperature compensated current. A current mirror duplicates the temperature compensated current to a bias voltage generator. The bias voltage generator generates the bias voltage.

    摘要翻译: 用于差分放大器的偏置系统包括NMOS电流源和栅极偏置电压发生器。 栅极偏置电压发生器产生偏置电压VNCS以控制NMOS电流源。 栅极偏置发生器包括参考电流发生器,以产生相对独立于电源电压变化的参考电流。 温度补偿器调节参考电流以提供温度补偿电流。 电流镜将温度补偿电流复制到偏置电压发生器。 偏置电压发生器产生偏置电压。