Sensing a field with a sensor that includes bias resetting of an active device of the sensor
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United States of America Patent
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Jun 10, 2014
Grant Date -
Jan 10, 2013
app pub date -
Jul 5, 2011
filing date -
Jul 5, 2011
priority date (Note) -
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Abstract
Apparatuses, methods and systems of sensor sampling of a field are disclosed. One apparatus includes a magnetometer that includes a sensor responsive to an applied field. Embodiments of the sensor include an active device and oscillator circuitry, wherein the sensor generates an output signal having a frequency that is dependent on the applied field. The magnetometer further includes a bias reset controller for resetting a bias of the active device and a sampler for sampling the output signal. Further, a reset-rate of the resetting of the bias of the active device is high enough to influence 1/f noise generated by the active device.
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