Capacitive sensor device with drift compensation and related portable electronic device

• Main Authors: ROAISSIA CHAOUKI, OTT, JOHN, G., III, GRISOT SEBASTIEN
• Format: Patent
• Language: Chinese; English
• Published: 17.02.2023
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

The utility model relates to a capacitive sensor device with drift compensation and a related portable electronic device. The capacitive sensor device includes a capacitance measurement circuit, a main sensing input, and a reference sensing input, where the capacitive sensor device is configured to measure, using the capacitance measurement circuit, a current main value of capacitance as seen by the main sensing input and a current reference value of capacitance as seen by the reference sensing input, wherein the capacitive sensor device is configured to at least temporarily store at least one previously measured reference value, and wherein the capacitive sensor device is configured to determine a corrected current main value of the capacitance using 1) the current main value, 2) the current reference value and at least one previously measured reference value, and 3) at least one current correction coefficient, wherein the capacitive sensor device is configured to adaptively determine at least one current co