Applied voltage control device for sensor
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United States of America Patent
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Oct 24, 2017
Grant Date -
Dec 15, 2016
app pub date -
May 10, 2016
filing date -
Jun 12, 2015
priority date (Note) -
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Abstract
An applied voltage control device is used for a sensor, in which a direct current corresponding to an oxygen amount flows when a DC voltage is applied to the sensor, and an alternating current corresponding to a sensor impedance flows when an AC voltage is applied to the sensor. The applied voltage control device includes: a filtering unit that sets a cutoff frequency of the AC voltage applied to the sensor variable.
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