Gas sensor
AssigneeTDK Corporation
InventorKei TANABE
Life of this patent
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Abstract
Disclosed herein is a gas sensor that includes: a sensor part configured to generate a gas detection signal according to a concentration of a gas to be measured; a differential amplifier configured to amplify a difference between the gas detection signal and a reference voltage to generate a differential signal; and a control circuit configured to generate an output signal indicating the concentration of the gas to be measured based on the differential signal. When the concentration of the gas to be measured falls below a threshold value corresponding to a level of the differential signal that is determined to be a concentration of the gas to be measured under normal conditions, the control circuit is configured to correct the reference voltage.
Claims12
A gas sensor comprising:
- a sensor part configured to generate a gas detection signal according to a concentration of a gas to be measured;
- a differential amplifier configured to amplify a difference between the gas detection signal and a reference voltage to generate a differential signal;
- and
- a control circuit configured to generate an output signal indicating the concentration of the gas to be measured based on the differential signal,
- wherein when the concentration of the gas to be measured falls below a threshold value corresponding to a level of the differential signal that is determined to be a concentration of the gas to be measured under normal conditions, the control circuit is configured to correct the reference voltage such that a level of the difference signal becomes equal to or more than the threshold value.
A gas sensor comprising:
- a sensor part configured to generate a gas detection signal according to a concentration of a gas to be measured;
- a differential amplifier configured to amplify a difference between the gas detection signal and a reference voltage to generate a differential signal;
- and
- a control circuit configured to generate an output signal indicating the concentration of the gas to be measured based on the differential signal,
- wherein when the concentration of the gas to be measured falls below a threshold value corresponding to a level of the differential that signal is determined to be a concentration of the gas to be measured under normal conditions, the control circuit is configured to correct the reference voltage such that a level of the difference signal becomes close to the threshold value.
Dependencies are inferred from the claim text.