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US 11,898,979 B2Granted
Gas sensor with improved sensitivity and gas sensor component
AssigneeTDK Corporation
InventorMatthias König
Life of this patent
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Abstract
A gas sensor with improved sensitivity. The gas sensor comprises an active sensor unit, a reference sensor unit and a temperature control circuit. The active sensor unit has an active detector. The reference sensor unit has a reference detector. The temperature control circuit is provided and configured to keep a detector at a predetermined temperature.
Claims11
A gas sensor with improved sensitivity, comprising
- an active sensor unit with an active detector, an active-sensor heater, and a catalyst,
- a reference sensor unit with a reference detector and a reference-sensor heater,
- a temperature control circuit provided and configured to keep the active detector at a constant, predetermined temperature,
- wherein the temperature control circuit comprises an operational amplifier with an inverted input, a non-inverted input, and an output, and wherein the output of the operational amplifier is electrically coupled directly to the active-sensor heater of the active sensor unit and directly to the reference-sensor heater of the reference sensor unit.
1 more element
Dependencies are inferred from the claim text.