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公开(公告)号：US10168397B2
公开(公告)日：2019-01-01
申请号：US15885140
申请日：2018-01-31
IPC分类号： G01R33/09
摘要： A magnetic field sensor includes a plurality of transducer legs coupled together as a first circuit to sense a magnetic field, wherein each transducer leg comprises a plurality of magnetoresistance sense elements. The magnetic field sensor also includes a second circuit including a first plurality of current lines, wherein each current line of the first plurality of current lines is adjacent to a corresponding plurality of magnetoresistance sense elements of a transducer leg of the plurality of transducer legs. When at least one current line of the first plurality of current lines is energized, a magnetization of each magnetoresistance sense element of the transducer leg is aligned in a first direction or a second direction opposite to the first direction. A routing pattern of the at least one current line is configured to generate an equal population of magnetoresistance sense elements with magnetization aligned in the first and second directions.
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公开(公告)号：US10281531B2
公开(公告)日：2019-05-07
申请号：US15344149
申请日：2016-11-04
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 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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3.发明授权Bipolar chopping for 1/F noise and offset reduction in magnetic field sensors 有权双极斩波用于1 / F噪声和磁场传感器的偏移减少公开(公告)号：US09519034B2
公开(公告)日：2016-12-13
申请号：US14495753
申请日：2014-09-24
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 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 provides 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。 场传感器响应于双极性脉冲提供高输出和低输出。 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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公开(公告)号：US11733317B2
公开(公告)日：2023-08-22
申请号：US17735185
申请日：2022-05-03
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 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：US11353520B2
公开(公告)日：2022-06-07
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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公开(公告)号：US10928463B2
公开(公告)日：2021-02-23
申请号：US16358898
申请日：2019-03-20
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：US20180156876A1
公开(公告)日：2018-06-07
申请号：US15885140
申请日：2018-01-31
IPC分类号： G01R33/09
CPC分类号： G01R33/091 , G01R33/096 , G01R33/098
摘要： A magnetic field sensor includes a plurality of transducer legs coupled together as a first circuit to sense a magnetic field, wherein each transducer leg comprises a plurality of magnetoresistance sense elements. The magnetic field sensor also includes a second circuit including a first plurality of current lines, wherein each current line of the first plurality of current lines is adjacent to a corresponding plurality of magnetoresistance sense elements of a transducer leg of the plurality of transducer legs. When at least one current line of the first plurality of current lines is energized, a magnetization of each magnetoresistance sense element of the transducer leg is aligned in a first direction or a second direction opposite to the first direction. A routing pattern of the at least one current line is configured to generate an equal population of magnetoresistance sense elements with magnetization aligned in the first and second directions.
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公开(公告)号：US09910106B2
公开(公告)日：2018-03-06
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 magnetic field sensor includes a plurality of transducer legs coupled together as a first circuit to sense a magnetic field, wherein each transducer leg comprises a plurality of magnetoresistance sense elements. The magnetic field sensor also includes a second circuit including a first plurality of current lines, wherein each current line of the first plurality of current lines is adjacent to a corresponding plurality of magnetoresistance sense elements of a transducer leg of the plurality of transducer legs. When at least one current line of the first plurality of current lines is energized, a magnetization of each magnetoresistance sense element of the transducer leg is aligned in a first direction or a second direction opposite to the first direction. A routing pattern of the at least one current line is configured to generate an equal population of magnetoresistance sense elements with magnetization aligned in the first and second directions.
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