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公开(公告)号：US20190212399A1
公开(公告)日：2019-07-11
申请号：US16358898
申请日：2019-03-20
CPC分类号： G01R33/0029 , G01R33/06 , G01R33/09 , G01R33/098
摘要： A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor comprises a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output comprising a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
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公开(公告)号：US20160320459A1
公开(公告)日：2016-11-03
申请号：US15134134
申请日：2016-04-20
IPC分类号： G01R33/09
CPC分类号： G01R33/091 , G01R33/096 , G01R33/098
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20220260651A1
公开(公告)日：2022-08-18
申请号：US17735185
申请日：2022-05-03
摘要： A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output including a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
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公开(公告)号：US20210199729A1
公开(公告)日：2021-07-01
申请号：US17146516
申请日：2021-01-12
摘要： A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output including a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
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5.发明申请BIPOLAR CHOPPING FOR 1/F NOISE AND OFFSET REDUCTION IN MAGNETIC FIELD SENSORS 审中-公开用于磁场传感器1 / F噪声和偏移减少的双极振荡公开(公告)号：US20170074948A1
公开(公告)日：2017-03-16
申请号：US15344149
申请日：2016-11-04
CPC分类号： G01R33/0029 , G01R33/06 , G01R33/09 , G01R33/098
摘要： A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor comprises a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output comprising a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
摘要翻译： 实现斩波技术和相关联的结构以消除隧道磁阻（TMR）场传感器中的磁1 / f噪声贡献。 TMR场传感器包括包括用于感测磁场的多个TMR元件的第一桥接电路和用于施加与每个TMR元件相邻的双极电流脉冲的第二电路。 电流线串联或顺序连接到电流源以接收双极电流脉冲。 场传感器具有响应于双极性脉冲的包括高输出和低输出的输出。 这种不对称响应允许在场传感器中进行1 / f降噪的斩波技术。
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