Multi-channel capacitance sensing measurement circuit

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United States of America

PATENT NO 12078666
SERIAL NO

17602773

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Abstract

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A capacitance measurement circuit for determining complex electric currents in a multi-channel capacitive sensing device includes a first sensing circuit for selectively connecting one of a plurality of sense electrodes to a common sense node and for connecting a corresponding guard electrode of the sense electrode to a common guard node, and at least a second sensing circuit. A measurement signal voltage source provides an alternating measurement voltage to the common guard node in a remotely controllable manner. A diagnostic signal voltage source provides an alternating diagnostic voltage to the common guard node in a remotely controllable manner. A current measurement circuit is connected with a signal input port to the common sense node and with a reference input port to the output port of the measurement signal voltage source.

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Patent Owner(s)

Patent OwnerAddress
IEE INTERNATIONAL ELECTRONICS & ENGINEERING S AZONE INDUSTRIELLE 12 RUE PIERRE RICHARDOT ECHTERNACH L-6468

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Farsch, Bernd Schweich, DE 1 1
Konfar, Attila Oberbillig, DE 1 1
Lamesch, Laurent Reichlange, LU 71 514
Urig, Christian Püttlingen, DE 4 5
Wendt, Christoph Trier, DE 16 130

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