Magnetic field sensor with automatic sensitivity adjustment

    公开(公告)号:US07923996B2

    公开(公告)日:2011-04-12

    申请号:US12037393

    申请日:2008-02-26

    IPC分类号: G01R33/06 G01R33/07 G01R33/09

    摘要: Magnetic field sensors have a magnetic field sensing element and also a feedback circuit to provide a gain-adjustment signal to affect a sensitivity associated with the magnetic field sensing element. In some arrangements, the feedback circuit can include piezoresistors to sense a strain of a substrate over which the magnetic field sensor is disposed. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed strain. In other arrangements, the feedback circuit can generate pulsed magnetic fields proximate to the magnetic field sensing element in order to directly measure the sensitivity of the magnetic field sensing element. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed sensitivity.

    Magnetic field sensor with automatic sensitivity adjustment
    4.
    发明授权
    Magnetic field sensor with automatic sensitivity adjustment 有权
    磁场传感器具有自动灵敏度调节

    公开(公告)号:US08030918B2

    公开(公告)日:2011-10-04

    申请号:US12959672

    申请日:2010-12-03

    IPC分类号: G01R33/06 G01R33/07 G01R33/09

    摘要: Magnetic field sensors have a magnetic field sensing element and also a feedback circuit to provide a gain-adjustment signal to affect a sensitivity associated with the magnetic field sensing element. In some arrangements, the feedback circuit can include piezoresistors to sense a strain of a substrate over which the magnetic field sensor is disposed. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed strain. In other arrangements, the feedback circuit can generate pulsed magnetic fields proximate to the magnetic field sensing element in order to directly measure the sensitivity of the magnetic field sensing element. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed sensitivity.

    摘要翻译: 磁场传感器具有磁场感测元件以及反馈电路,以提供增益调节信号以影响与磁场感测元件相关联的灵敏度。 在一些布置中,反馈电路可以包括压敏电阻器,用于感测设置有磁场传感器的基板的应变。 利用这些布置,反馈电路可以根据感测的应变产生增益调整信号。 在其他布置中,反馈电路可以产生靠近磁场感测元件的脉冲磁场,以便直接测量磁场感测元件的灵敏度。 利用这些布置,反馈电路可以根据所感测的灵敏度产生增益调整信号。

    MAGNETIC FIELD SENSOR WITH AUTOMATIC SENSITIVITY ADJUSTMENT
    5.
    发明申请
    MAGNETIC FIELD SENSOR WITH AUTOMATIC SENSITIVITY ADJUSTMENT 有权
    具有自动灵敏度调整的磁场传感器

    公开(公告)号:US20090212765A1

    公开(公告)日:2009-08-27

    申请号:US12037393

    申请日:2008-02-26

    IPC分类号: G01R35/00

    摘要: Magnetic field sensors have a magnetic field sensing element and also a feedback circuit to provide a gain-adjustment signal to affect a sensitivity associated with the magnetic field sensing element. In some arrangements, the feedback circuit can include piezoresistors to sense a strain of a substrate over which the magnetic field sensor is disposed. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed strain. In other arrangements, the feedback circuit can generate pulsed magnetic fields proximate to the magnetic field sensing element in order to directly measure the sensitivity of the magnetic field sensing element. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed sensitivity.

    摘要翻译: 磁场传感器具有磁场感测元件以及反馈电路,以提供增益调节信号以影响与磁场感测元件相关联的灵敏度。 在一些布置中,反馈电路可以包括压敏电阻器,用于感测设置有磁场传感器的基板的应变。 利用这些布置,反馈电路可以根据感测的应变产生增益调整信号。 在其他布置中,反馈电路可以产生靠近磁场感测元件的脉冲磁场,以便直接测量磁场感测元件的灵敏度。 利用这些布置,反馈电路可以根据所感测的灵敏度产生增益调整信号。

    Magnetic Field Sensor with Automatic Sensitivity Adjustment
    6.
    发明申请
    Magnetic Field Sensor with Automatic Sensitivity Adjustment 有权
    具有自动灵敏度调节的磁场传感器

    公开(公告)号:US20110074405A1

    公开(公告)日:2011-03-31

    申请号:US12959672

    申请日:2010-12-03

    IPC分类号: G01R33/07 G01R33/02

    摘要: Magnetic field sensors have a magnetic field sensing element and also a feedback circuit to provide a gain-adjustment signal to affect a sensitivity associated with the magnetic field sensing element. In some arrangements, the feedback circuit can include piezoresistors to sense a strain of a substrate over which the magnetic field sensor is disposed. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed strain. In other arrangements, the feedback circuit can generate pulsed magnetic fields proximate to the magnetic field sensing element in order to directly measure the sensitivity of the magnetic field sensing element. With these arrangements, the feedback circuit can generate the gain-adjustment signal in accordance with the sensed sensitivity.

    摘要翻译: 磁场传感器具有磁场感测元件以及反馈电路,以提供增益调节信号以影响与磁场感测元件相关联的灵敏度。 在一些布置中,反馈电路可以包括压敏电阻器,用于感测设置有磁场传感器的基板的应变。 利用这些布置,反馈电路可以根据感测的应变产生增益调整信号。 在其他布置中,反馈电路可以产生靠近磁场感测元件的脉冲磁场,以便直接测量磁场感测元件的灵敏度。 利用这些布置,反馈电路可以根据所感测的灵敏度产生增益调整信号。

    Magnetic field sensor with improved differentiation between a sensed magnetic field signal and a noise signal
    9.
    发明授权
    Magnetic field sensor with improved differentiation between a sensed magnetic field signal and a noise signal 有权
    磁场传感器具有改善的感测磁场信号与噪声信号之间的微分

    公开(公告)号:US08564285B2

    公开(公告)日:2013-10-22

    申请号:US12845115

    申请日:2010-07-28

    IPC分类号: G01R33/06

    CPC分类号: G01R33/07 G01R33/0029

    摘要: A magnetic field sensor includes a Hall element configured to generate a Hall element output signal in response to a magnetic field, the Hall element output signal comprising a magnetic field signal component and an offset signal component. The magnetic field sensor also includes a Hall element modulation circuit coupled to receive the Hall element output signal and configured to generate a modulation circuit output signal. The Hall element modulation circuit is modulated with a modulation signal having a changing modulation frequency that changes between a minimum frequency and a maximum frequency.

    摘要翻译: 磁场传感器包括霍尔元件,其被配置为响应于磁场产生霍尔元件输出信号,霍尔元件输出信号包括磁场信号分量和偏移信号分量。 磁场传感器还包括霍尔元件调制电路,该霍尔元件调制电路被耦合以接收霍尔元件输出信号并被配置为产生调制电路输出信号。 霍尔元件调制电路用具有在最小频率和最大频率之间变化的调制频率的调制信号进行调制。

    DETERMINING ADDRESSES OF ELECTRICAL COMPONENTS ARRANGED IN A DAISY CHAIN
    10.
    发明申请
    DETERMINING ADDRESSES OF ELECTRICAL COMPONENTS ARRANGED IN A DAISY CHAIN 有权
    确定在DAISY链中安装的电气部件的地址

    公开(公告)号:US20120131231A1

    公开(公告)日:2012-05-24

    申请号:US13344959

    申请日:2012-01-06

    申请人: Gerardo Monreal

    发明人: Gerardo Monreal

    IPC分类号: G06F3/00

    CPC分类号: G06F13/37 G06F13/4068

    摘要: In one aspect, a system includes electrical components arranged in a daisy chain that include a first electrical component disposed at a first end of the daisy chain and a second electrical component disposed at an opposite end of the daisy chain than the first end. Each of the first and second electrical components includes an input port, an output port and a common port. The input port of the first electrical component is coupled to one of a supply voltage port or ground and the common ports of the first and second electrical components are coupled to the other one of the supply voltage or the ground. An address of the second electrical component is determined before addresses of the other of the electrical components are determined, and the addresses determine a position of an electrical component with respect to the other of the electrical components.

    摘要翻译: 在一个方面,一种系统包括以菊链形式布置的电气部件,其包括设置在菊链的第一端的第一电气部件和布置在菊花链相对于第一端的相对端的第二电气部件。 第一和第二电气部件中的每一个包括输入端口,输出端口和公共端口。 第一电气部件的输入端口耦合到电源电压端口或接地中的一个,并且第一和第二电气部件的公共端口耦合到电源电压或地面中的另一个。 在确定另一个电气部件的地址之前确定第二电气部件的地址,并且该地址确定电气部件相对于另一个电气部件的位置。