High dynamic range magnetometer architecture
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United States of America Patent
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Jul 16, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jul 18, 2016
filing date -
Jul 18, 2016
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Abstract
A high dynamic range magnetometer architecture and method are disclosed. In an embodiment, a magnetometer sensor comprises: a variable magnetic gain stage including a plurality of selectable signal gain paths, each signal gain path including a magnetic sensor and a magnetic flux concentrator, and for each signal gain path the magnetic flux concentrator being positioned a different distance from the magnetic flux concentrator to provide a different magnetic gain for the signal gain path; a variable magnetic sensing stage coupled to the variable magnetic gain stage, the variable magnetic sensing stage operable to provide variable magnetic sensing to each signal gain path; and a gain control stage coupled to the variable magnetic sensing stage, the gain control stage operable to select one of the signal gain paths and to provide signal conditioning to the selected signal gain path.
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