公开(公告)号：US20160139230A1

公开(公告)日：2016-05-19

申请号：US14541735

申请日：2014-11-14

Applicant: Allegro Microsystems, LLC

Inventor： Craig S. Petrie ,  Bryan Cadugan

IPC: G01R35/00 ,  G01R31/28

CPC classification number: G01R35/005 ,  G01D5/145 ,  G01D5/2448 ,  G01D5/2449 ,  G01R31/2884 ,  G01R33/0035 ,  G01R33/072

Abstract: A magnetic field sensor includes at least one magnetic field sensing element configured to generate a measured magnetic field signal responsive to an external magnetic field and to generate a reference magnetic field signal responsive to a reference magnetic field and a calibration circuit configured to divide the measured magnetic field signal by the reference magnetic field signal to generate a calibrated magnetic field signal. The calibrated signal has reduced susceptibility to stress influences.

Abstract translation: 磁场传感器包括至少一个磁场感测元件，其被配置为响应于外部磁场产生测量的磁场信号，并且响应于参考磁场产生参考磁场信号，并且校准电路被配置为将测量的磁 通过参考磁场信号产生一个校准的磁场信号。 校准信号降低了对应力影响的敏感性。

公开(公告)号：US20150042320A1

公开(公告)日：2015-02-12

申请号：US13960910

申请日：2013-08-07

Applicant: Allegro Microsystems, LLC

Inventor： Bryan Cadugan ,  Jim Rice

IPC: G01B7/004 ,  G01R33/06

CPC classification number: G01R33/06 ,  G01D5/145 ,  G01R33/075

Abstract: Systems and methods for sensing position of a magnetic target are disclosed. In embodiments, three magnetic field sensing elements are arranged equidistantly from each other to define a plane and a central axis perpendicular to the plane. The magnetic field sensing elements are configured to generate a respective output signal representing proximity of a magnetic target that is proximate to the central axis and capable of moving relative to the central axis. A processor circuit is coupled to receive output signals from each of the sensors and configured to calculate a position of the magnetic target relative to the plane.

Abstract translation: 公开了用于感测磁性靶的位置的系统和方法。 在实施例中，三个磁场感测元件彼此等距地布置以限定垂直于该平面的平面和中心轴。 磁场感测元件被配置为产生表示邻近中心轴线且能够相对于中心轴线移动的磁性靶的接近度的相应输出信号。 处理器电路被耦合以从每个传感器接收输出信号并且被配置为计算磁性目标相对于该平面的位置。

公开(公告)号：US08848320B1

公开(公告)日：2014-09-30

申请号：US14043057

申请日：2013-10-01

Applicant: Allegro Microsystems, LLC

Inventor： Paul A. David ,  William P. Taylor ,  Bryan Cadugan

IPC: G11B5/33

CPC classification number: G01R33/096

Abstract: Novel anisotropic magneto-resistive (AMR) sensor architectures and techniques for fabricating same are described. In some embodiments, AMR sensors having barber pole structures disposed below corresponding AMR sensing elements are provided. AMR sensors having segmented AMR sensing elements are also described. Fabrication techniques that can be used to fabricate such sensors are also described. Fabrication techniques are also described that can reduce the risk of contamination during AMR sensor fabrication.

Abstract translation: 描述了新型各向异性磁阻（AMR）传感器体系结构及其制造技术。 在一些实施例中，提供了具有设置在相应的AMR感测元件下方的理发杆结构的AMR传感器。 还描述了具有分段的AMR感测元件的AMR传感器。 还描述了可用于制造这种传感器的制造技术。 还描述了可以降低AMR传感器制造期间污染风险的制造技术。