Current sensor, detection device, detection method, and program
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United States of America Patent
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Jun 29, 2021
Grant Date -
Mar 5, 2020
app pub date -
Aug 30, 2019
filing date -
Aug 31, 2018
priority date (Note) -
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Abstract
Deterioration in transient response characteristics of a current sensor may cause overshoot or delay. Thus, it is difficult to achieve good transient response characteristics of a magnetic field. A current sensor is provided, including: a detection unit outputting a signal corresponding to a magnetic field generated by detection current flowing through a current path; a reception unit receiving the signal corresponding to the magnetic field; a filter unit filtering the signal received by the reception unit; and an output unit outputting an output signal indicating the detection current according to the filtered signal, wherein detection gain, as gain of magnetic flux density detected by the detection unit, has a gain fluctuation band that changes with an increase in a frequency of the detection current, and the filter unit has gain that cancels out the change in the detection gain in at least a part of the gain fluctuation band.
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