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Title:
SENSING CIRCUIT AND METHOD FOR OPERATING THE SAME
Document Type and Number:
WIPO Patent Application WO/2013/014042
Kind Code:
A9
Abstract:
In one embodiment a sensing circuit comprises a first serial circuit comprising a first and a second capacitor (C1, C2) connected in series, the first serial circuit being connected between a first node (P) and a second node (R), a first transmitter (Tx1) which is coupled to the first node (P) in a switchable manner, a receiver (Rx) which is coupled to the second node (R) in a switchable manner, wherein a first floating electrode (E1) is constituted by the adjacent plates of first and second capacitor (C1, C2),wherein the first floating electrode (E1) is adapted to emit an electric field by means of the first transmitter (Tx1) and to detect a change in capacitance in the emitted electric field caused by an external object, and wherein the receiver (Rx) is adapted to provide an output signal (Vout) as a function of the change in capacitance at the first floating electrode (E1). Furthermore, a method for operating the sensing circuit is described.

Inventors:
SINGNURKAR, Pramod (Jakob Gschiel Gasse 10/1/5, Graz, A-8052, AT)
ANILLOY, Frank (Jakob Gschiel Gasse 10/1/5, Graz, A-8052, AT)
Application Number:
EP2012/064087
Publication Date:
June 06, 2013
Filing Date:
July 18, 2012
Export Citation:
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Assignee:
AMS AG (Schloss Premstätten, Tobelbader Str. 30, Unterpremstätten, A-8141, AT)
SINGNURKAR, Pramod (Jakob Gschiel Gasse 10/1/5, Graz, A-8052, AT)
ANILLOY, Frank (Jakob Gschiel Gasse 10/1/5, Graz, A-8052, AT)
International Classes:
H03K17/955
Attorney, Agent or Firm:
ASSOCIATION OF REPRESENTATIVES NO. 175 EPPING HERMANN FISCHER PATENTANWALTSGESELLSCHAFT MBH (Ridlerstraße 55, München, 80339, DE)
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