Patent · US Expired

Circuit arrangement for a sensor element

US5973417A · kind A · utility

102Cited by

5References

30Claims

0Family size

Assignee

E.G.O. Elektro-Geraetebau GmbH · DE

Inventors

Bernhard Goetz · Eppingen, DE
Ivo Russ · Oberderdingen, DE

Key dates

Filing date	Feb 17, 1998
Grant date	Oct 26, 1999
Priority date	—
Expiry date	Feb 17, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/96076
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A circuit arrangement (11) has an activating circuit (13) for a sensor element (12) of a touch contact switch, which in one embodiment of the invention contains a frequency generator (16). The frequency generator (16) generates a frequency-modulated activating signal (17), which is applied to the sensor element (12). In another embodiment the forming of the activating signal (17) takes place in a microcontroller (48), containing eventually the activating part (13) and or the evaluation of the signal. Through passing through a large frequency range for the activating signal (17), the influence of extraneous signals, even when using a lower signal voltage, is minimized.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.