公开(公告)号：US20160320462A1

公开(公告)日：2016-11-03

申请号：US15140137

申请日：2016-04-27

Applicant: EVERSPIN TECHNOLOGIES, INC.

Inventor： Phillip G. MATHER ,  Anuraag MOHAN ,  Guido DE SANDRE

IPC: G01R33/09 ,  G01R33/02 ,  G01R33/00

CPC classification number: G01R33/098 ,  G01R33/0011 ,  G01R33/0023 ,  G01R33/0206

Abstract: A magnetic field sensor is disclosed with built-in self-test coils in a configuration to provide magnetic field stimulation along three axes, with a high field factor, and thus, reduce a power budget of the sensor and physical size of the self-test coils. The magnetic field sensor comprises a first bridge circuit including a plurality of sense elements configured to sense a magnetic field. The magnetic field sensor further comprises re-configurable self-test current lines coupled to a self-test source to perform high field, high power wafer and die level testing and trim, as well as low power in-situ characterization and calibration of the sensor. The self-test current lines may be routed to form a coil with multiple turns around the TMR elements.

Abstract translation: 公开了一种磁场传感器，其具有内置自检线圈，其构造为沿着三个轴提供磁场刺激，具有高场因子，从而降低传感器的功率预算和自检的物理尺寸 线圈 磁场传感器包括第一桥接电路，其包括被配置为感测磁场的多个感测元件。 磁场传感器还包括耦合到自检源的可重新配置的自检电流线，以执行高场，高功率晶片和管芯级测试和修整，以及传感器的低功率原位表征和校准 。 自测电流线可以被路由以形成围绕TMR元件的多个匝的线圈。

公开(公告)号：US20160320459A1

公开(公告)日：2016-11-03

申请号：US15134134

申请日：2016-04-20

Applicant: EVERSPIN TECHNOLOGIES, INC.

Inventor： Phillip G. MATHER ,  Bradley Neal ENGEL ,  Guido DE SANDRE

IPC: G01R33/09

CPC classification number: G01R33/091 ,  G01R33/096 ,  G01R33/098

Abstract: A system, device, and method are disclosed for a tunneling magnetoresistance (TMR) magnetic sensor to effectively increase magnetic field measurement linearity and minimize cross-axis interference. The TMR magnetic sensor comprises a plurality of transducer legs, each having multiple sense elements. The TMR magnetic sensor comprises a plurality of built-in current lines located adjacent to each sense element. The current lines are routed such that two or more sense elements have magnetic responses that have opposing contributions from the cross-axis effect for a given field direction in each transducer leg within the TMR magnetic sensor. Therefore, the overall field response from each transducer leg is internally compensated and the TMR magnetic sensor has an output with minimal cross-axis interference.

Abstract translation: 公开了一种用于隧道磁阻（TMR）磁传感器的系统，装置和方法，以有效地增加磁场测量线性度并使跨轴干涉最小化。 TMR磁传感器包括多个换能器腿，每个具有多个感测元件。 TMR磁传感器包括位于每个感测元件附近的多个内置电流线。 当前线路由使得两个或更多个感测元件具有对TMR磁传感器内的每个换能器支路中的给定场方向的横轴效应具有相反贡献的磁响应。 因此，来自每个换能器支路的总体场响应被内部补偿，并且TMR磁传感器具有最小横轴干扰的输出。