发明名称 |
BIPOLAR CHOPPING FOR I/F NOISE AND OFFSET REDUCTION IN MAGNETIC FIELD SENSORS |
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. |
申请公布号 |
EP3143420(A1) |
申请公布日期 |
2017.03.22 |
申请号 |
EP20150793363 |
申请日期 |
2015.03.13 |
申请人 |
Everspin Technologies, Inc. |
发明人 |
ENGEL, Bradley Neal;MATHER, Philip G. |
分类号 |
G01R33/09;G01R33/06 |
主分类号 |
G01R33/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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