Sensor circuit for measuring a measuring quantity

Sensor circuit for measuring a measuring quantity

A sensor circuit has a first input terminal, a second input terminal and an output terminal, a capacitive sensor connected between the first input terminal and the output terminal, a field-effect transistor coupled to the output terminal at one of a source and a drain terminal and coupled to the sec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ROESCH OLAF, SCHLEDZ RALF
Format: Patent
Sprache:eng
Schlagworte:
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
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Beschreibung
Zusammenfassung:A sensor circuit has a first input terminal, a second input terminal and an output terminal, a capacitive sensor connected between the first input terminal and the output terminal, a field-effect transistor coupled to the output terminal at one of a source and a drain terminal and coupled to the second input terminal at the other one of the source and drain terminals, and a driver implemented to set a potential at a control terminal of the field-effect transistor such that in sensor operation the field-effect transistor is operated in a sub-threshold voltage range.