利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

128 条记录 (耗时 0.02 秒)

    Magnetic field sensor with multiple sense layer magnetization orientations
    2.
    发明授权
    Magnetic field sensor with multiple sense layer magnetization orientations 有权

    公开(公告)号：US09841469B2

    公开(公告)日：2017-12-12

    申请号：US15006911

    申请日：2016-01-26

    申请人： FREESCALE SEMICONDUCTOR, INC.

    发明人： Paige M. Holm ,  Lianjun Liu

    IPC分类号： G01R33/00 ,  G01R33/09 ,  G01R17/10

    CPC分类号： G01R33/0005 ,  G01R17/10 ,  G01R33/0011 ,  G01R33/093 ,  G01R33/098

    摘要： A magnetic field sensor comprises a sensor bridge having multiple sensor legs. Each sensor leg includes magnetoresistive sense elements, each comprising a pinned layer having a reference magnetization parallel to a plane of the sensor and a sense layer having a sense magnetization. A permanent magnet layer spaced apart from the sense elements magnetically biases the sense magnetization into an out-of-plane direction that is non-perpendicular to the plane of the sensor. The sense magnetization of a portion of the sense elements is oriented in a first direction and the sense magnetization of a different portion of the sense elements is oriented in a second direction differing from the first direction to generate two unique bias field vectors of the sense layers which enables detection of the external magnetic field in a sensing direction that is perpendicular to the plane of the magnetic field sensor without inter-axis coupling of sensor response.

    CURRENT SENSOR
    4.
    发明申请
    CURRENT SENSOR 有权
    电流传感器

    公开(公告)号：US20140327437A1

    公开(公告)日：2014-11-06

    申请号：US14368299

    申请日：2012-10-30

    申请人： Jiangsu Multidimension Technology Co., Ltd.

    发明人： Liansheng Han ,  Jianmin Bai ,  Wei Li ,  Songsheng Xue

    IPC分类号： G01R19/00 ,  G01R33/06

    CPC分类号： G01R19/0092 ,  G01R15/205 ,  G01R17/10 ,  G01R19/32 ,  G01R33/06 ,  G01R33/098

    摘要： This patent discloses a current sensor comprising a sensor bridge (14), which consists of several magnetic tunnel junction (MTJ) elements (R11, R12, R21, R22), a MTJ temperature compensation resistor (16), and a current lead (20), which are integrated onto the same chip. The current lead (20) is positioned close to the sensor bridge (14), and it is used to carry the test current (19). A permanent magnet (17) is arranged at the periphery of the MTJ temperature compensation resistor (16). The permanent magnet (17) rigidly aligns the magnetization direction (7) of the free layer of the MTJ temperature compensation resistor (16) anti-parallel to the magnetization direction (8) of a pinning layer; so that the MTJ temperature compensation resistor (16) remains in a high resistance state providing a resistance value that changes as a function of temperature. The sensor bridge (14) is connected in series with the MTJ temperature compensation resistor (16) in order to temperature compensate the sensor bridge (14). A magnetic field (21) generated by the test current (19) produces an output voltage at the output of the temperature compensated sensor bridge that is proportional to the test current value. As a result of this temperature compensated structure, the current sensor has the advantages of high sensitivity, wide linear range, low power consumption, and excellent temperature stability.

    摘要翻译： 该专利公开了一种电流传感器，包括传感器桥（14），其由若干磁性隧道结（MTJ）元件（R11，R12，R21，R22），MTJ温度补偿电阻（16）和电流引线 ），它们集成到同一个芯片上。 电流引线（20）位于传感器桥（14）附近，用于承载测试电流（19）。 永磁体（17）布置在MTJ温度补偿电阻器（16）的外围。 永磁体（17）使与MTJ温度补偿电阻器（16）的自由层的磁化方向（7）刚性对准，该磁化方向与销钉层的磁化方向（8）反平行; 使得MTJ温度补偿电阻器（16）保持在高电阻状态，提供随温度变化的电阻值。 传感器桥（14）与MTJ温度补偿电阻（16）串联连接，以便对传感器桥（14）进行温度补偿。 由测试电流（19）产生的磁场（21）在温度补偿传感器桥的输出处产生与测试电流值成比例的输出电压。 作为该温度补偿结构的结果，电流传感器具有灵敏度高，线性范围宽，功耗低，温度稳定性优异的优点。

    CIRCUIT AND METHOD OF SIGNAL DETECTION
    6.
    发明申请
    CIRCUIT AND METHOD OF SIGNAL DETECTION 有权
    电路和信号检测方法

    公开(公告)号：US20130307525A1

    公开(公告)日：2013-11-21

    申请号：US13475813

    申请日：2012-05-18

    申请人： Wei Chih CHEN

    发明人： Wei Chih CHEN

    IPC分类号： G01R17/10

    CPC分类号： H04L49/90 ,  G01R17/10

    摘要： A circuit includes an input stage, a comparison stage, and a calibration stage. The input stage is configured to receive a first input signal, to generate a first reference signal, and to generate a second reference signal. The comparison stage is configured to generate a first comparison output signal in response to the first reference signal and a third reference signal and to generate a second comparison output signal in response to the second reference signal and a fourth reference signal. The calibration stage is configured to generate a detection signal responsive to the presence of the first comparison output signal and the second comparison output signal having a signal frequency within a predetermined frequency band.

    摘要翻译： 电路包括输入级，比较级和校准级。 输入级被配置为接收第一输入信号，以产生第一参考信号，并产生第二参考信号。 比较级被配置为响应于第一参考信号和第三参考信号产生第一比较输出信号，并且响应于第二参考信号和第四参考信号产生第二比较输出信号。 校准级被配置为响应于第一比较输出信号的存在和具有预定频带内的信号频率的第二比较输出信号来产生检测信号。

    Method and apparatus for optimizing wheatstone bridge robust in change in temperature
    7.
    发明授权
    Method and apparatus for optimizing wheatstone bridge robust in change in temperature 有权
    用于优化惠斯通电桥耐温变化的方法和装置

    公开(公告)号：US08350579B2

    公开(公告)日：2013-01-08

    申请号：US12565310

    申请日：2009-09-23

    申请人： Jong Pal Kim ,  Sang-kon Bae

    发明人： Jong Pal Kim ,  Sang-kon Bae

    IPC分类号： G01R27/02 ,  G01R27/08 ,  G01R27/32 ,  G01R17/10

    CPC分类号： G01R17/10

    摘要： An apparatus for optimizing a Wheatstone bridge robust in a temperature change, the apparatus including; a voltage difference measuring unit which measures a voltage difference between a current input end and a current output end of the Wheatstone bridge, wherein the Wheatstone bridge comprises a first resistor, a second resistor, a third resistor and a fourth resistor and a tuning resistor; and a resistance tuning controller which detects a resistance ratio of a first distribution resistance and a second distribution resistance of the tuning resistor so that the voltage difference measuring unit measures a maximum voltage difference, and controls tuning of the tuning resistor according to the detected resistance ratio.

    摘要翻译： 一种用于优化在温度变化中坚固的惠斯通电桥的装置，所述装置包括： 电压差测量单元，其测量惠斯通电桥的电流输入端和电流输出端之间的电压差，其中惠斯登电桥包括第一电阻器，第二电阻器，第三电阻器和第四电阻器以及调谐电阻器; 以及电阻调谐控制器，其检测所述调谐电阻器的第一分配电阻和第二分配电阻的电阻比，使得所述电压差测量单元测量最大电压差，并且根据检测到的电阻比来控制所述调谐电阻器的调谐 。

    Thermal probe systems
    8.
    发明授权
    Thermal probe systems 有权
    热探头系统

    公开(公告)号：US07393136B2

    公开(公告)日：2008-07-01

    申请号：US11416104

    申请日：2006-05-03

    申请人： Anthony George Ernest Atkins ,  Graham Poulter

    发明人： Anthony George Ernest Atkins ,  Graham Poulter

    IPC分类号： G01K3/00

    CPC分类号： G01K7/24 ,  G01K7/20 ,  G01N25/48 ,  G01R17/10

    摘要： A thermal probe system has a Wollaston thermal sensor connected in one arm of a bridge. The other arms of the bridge are provided by resistors and a voltage is applied from a low-noise source via several op-amps. The output of the bridge is connected with a primary winding of a step-up transformer, the output of which connects with the input of an output amplifier, which, in turn, provides an output to a display.

    摘要翻译： 热探头系统具有连接在桥的一个臂中的沃拉斯顿热传感器。 桥的另一个臂由电阻器提供，并且通过几个运算放大器从低噪声源施加电压。 桥的输出与升压变压器的初级绕组连接，升压变压器的输出与输出放大器的输入端相连接，输出放大器又向显示器提供输出。

    Current sensor and mounting method thereof
    9.
    发明授权
    Current sensor and mounting method thereof 有权
    电流传感器及其安装方法

    公开(公告)号：US07355382B2

    公开(公告)日：2008-04-08

    申请号：US11617452

    申请日：2006-12-28

    申请人： Akira Okada ,  Junji Miyamoto

    发明人： Akira Okada ,  Junji Miyamoto

    IPC分类号： G01R15/20

    CPC分类号： G01R33/09 ,  G01R15/205 ,  G01R17/10 ,  G01R33/096

    摘要： A current sensor that can reduce a measurement error due to isotropic elongation or strain owing to temperature and the like. A first half bridge circuit is placed in a first region divided by a center line of a mounting substrate, and a second half bridge circuit is placed in a second region, and the half bridge circuits are equally formed and placed point symmetrically about the central point of the mounting substrate. Even if elongation or strain occurs isotropically in the mounting substrate of magnetoresistive elements owing to temperature, the half bridge circuits undergo the influence of the elongation or strain equally as the bridge circuit. Thus, it can cancel the effect and reduce the measurement error due to the isotropic elongation or strain owing to temperature.

    摘要翻译： 一种电流传感器，其可以减少由于各向同性伸长或由于温度等导致的应变引起的测量误差。 将第一半桥电路放置在由安装基板的中心线分割的第一区域中，并且将第二半桥电路放置在第二区域中，并且半桥电路相等地形成并且围绕中心点对称放置 的安装基板。 即使在由于温度导致的磁阻元件的安装基板中各向异性地发生伸长或应变的情况下，半桥电路作为桥接电路同样受到伸长率或应变的影响。 因此，它可以抵消由于温度引起的各向同性伸长或应变导致的测量误差。

    Low cost asic architecture for safety critical applications monitoring an applied stimulus
    10.
    发明授权
    Low cost asic architecture for safety critical applications monitoring an applied stimulus 有权
    用于监控应用刺激的安全关键应用的低成本asic架构

    公开(公告)号：US06765391B2

    公开(公告)日：2004-07-20

    申请号：US10277797

    申请日：2002-10-22

    申请人： David L. Corkum ,  Keith W. Kawate ,  Thomas R. Maher

    发明人： David L. Corkum ,  Keith W. Kawate ,  Thomas R. Maher

    IPC分类号： G01R2702

    CPC分类号： G01R17/10

    摘要： An ASIC (14, 14′, 14″) conditions two independent outputs (VINM, VINP) of a full Wheatstone piezoresistive bridge (12) in separate conditioning paths. Each path is provided with a bridge supply voltage (VHB1, VHB2) which can serve as a temperature related input signal to respective offset and gain compensation control circuits. The half bridge outputs are inputted to respective amplifiers (U1, U2) along with a selected percentage of the temperature dependent bridge supply voltage. The outputs of the amplifiers provide a signal proportional to respective half bridge output voltage. In one embodiment, the output of the amplifier (U2) in one conditioning path of one half bridge is connected to the input of an amplifier (U4) in the other conditioning path to provide a signal in the one path proportional to the Wheatstone bridge differential output voltage and in the other path a signal proportional to the Wheatstone half bridge output voltage. In another embodiment, the temperature dependent bridge supply voltage is multiplexed for a selected time upon power-up to an amplifier (U5) which normally receives an input from one of the bridge outputs.

    摘要翻译： 在独立的调节路径中，ASIC（14,14'，14“）在完整的惠斯登压阻电桥（12）处理两个独立的输出（VINM，VINP）。 每个路径都有一个桥接电源电压（VHB1，VHB2），它可以作为相关偏移和增益补偿控制电路的温度相关输入信号。 半桥输出与温度依赖电桥电源电压的选定百分比一起输入到相应的放大器（U1，U2）。 放大器的输出提供与各个半桥输出电压成比例的信号。 在一个实施例中，在一个半桥的一个调节路径中的放大器（U2）的输出连接到另一个调节路径中的放大器（U4）的输入，以在与惠斯通电桥差分成比例的一个路径中提供信号 输出电压和另一路径上的信号成比例的惠斯通半桥输出电压。 在另一个实施例中，在上电至通常从桥接输出之一接收输入的放大器（U5）时，依赖于温度的电桥电压被复用一段选定的时间。