Capacitance Sensor

Georg Brasseur (Erfinder), Thomas Bretterklieber (Erfinder), Dirk Hammerschmidt (Erfinder), Gert Holler (Erfinder), Tobias Werth (Erfinder), Hubert Zangl (Erfinder)

Publikation: SchutzrechtPatent

Abstract

A capacitance sensor, having at least one electrode is disclosed. A frequency spread signal generation circuit is coupled to the at least one electrode to apply a frequency spread signal based on a spread sequence. A periodic signal with a frequency is coupled to the at least one electrode. A frequency controller is coupled to the frequency spread signal generation circuit to vary the frequency of the periodic signal. A receiver circuit is coupled to the at least one or a further electrode to receive a version of the frequency spread signal which depends on a capacitance applied to the at least one electrode. An evaluation circuit is coupled to the receiver circuit to determine a capacitance value based on the received, dependent version of the frequency spread signal.

Originalspracheenglisch
VeröffentlichungsnummerUS2009243633
IPCG01R 27/ 26 A I
Prioritätsdatum6/12/07
PublikationsstatusVeröffentlicht - 1 Okt 2009

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