WIDE BANDWIDTH HALL SENSING CIRCUITRY WITH OFFSET COMPENSATION AND GAIN CALIBRATION
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United States of America Patent
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Issued Date -
Oct 10, 2024
app pub date -
Jul 31, 2023
filing date -
Apr 6, 2023
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Abstract
Methods, apparatus, systems, and articles of manufacture are described corresponding to wide bandwidth hall sensing circuitry. An example circuit includes a first hall effect sensor configured to output a first voltage corresponding to a magnetic field; an amplifier to output an amplified voltage by amplifying the first voltage; a second hall effect sensor configured to output a second voltage corresponding to the magnetic field, the second hall effect sensor operating using a spinning technique to toggle a bias current between terminals of the second hall effect sensor, the spinning technique to remove a first offset corresponding to the second hall effect sensor; and offset reduction circuitry configured to: determine a second offset corresponding to the first hall effect sensor based on the first voltage and the second voltage; and generate an output based on the second offset, the amplifier to adjust the amplified voltage based on the output.
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