An impedance measurement circuit for determining a complex impedance of a capacitive sensor having at least one sense electrode operable in loading mode and at least one guard electrode. The measurement circuit includes: a pulse generator unit for providing a periodic electric measurement signal and a periodic electric guard signal; a signal sensing circuit for sensing a sense current flowing through the at least one sense electrode or the sense electrodes in response to the pulse generator unit measurement signal; and a control and evaluation unit. The control and evaluation unit is configured for determining a complex impedance from the determined sense currents with reference to a complex reference potential.


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    Titel :

    LOW-COST, HIGH MEASUREMENT SPEED CAPACITIVE SENSING CIRCUIT FOR LOADING MODE OPERATION OF CAPACITIVE SENSORS


    Beteiligte:
    LAMESCH LAURENT (Autor:in) / JUSTINGER TOBIAS (Autor:in) / PÜTZ MICHAEL (Autor:in) / FABER THOMAS (Autor:in) / WENDT CHRISTOPH (Autor:in) / LORANG JOHNNY (Autor:in)

    Erscheinungsdatum :

    04.01.2024


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet / H03K PULSE TECHNIQUE , Impulstechnik



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