Title:
CIRCUIT MECHANISM FOR SENSOR ELEMENT
Document Type and Number:
Japanese Patent JP3889874
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide the circuit mechanism for an improved sensor element of a touch contact switch hardly affected by an external signal and not requiring an additional power supply especially.
SOLUTION: This circuit mechanism 11 has a start circuit 13 for a sensor element 12 for a touch contact switch including a frequency generator 16 in one embodiment. The frequency generator 16 generates a frequency modulation start signal 17 and it is fed to the sensor element 12. In other embodiment, Generation of the start signal 17 results in being included in the start circuit 13 or being executed in a micro controller 48 that evaluates the signal. The start signal 17 whose frequency is selected from a wide frequency range is transmitted and then the effect of an external signal is minimized even when the circuit device employs a low signal voltage.
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Inventors:
Goets Bernhard
Rusuifo
Rusuifo
Application Number:
JP4636298A
Publication Date:
March 07, 2007
Filing Date:
February 13, 1998
Export Citation:
Assignee:
AGEO Electro-Geretebauer GAMEBAHA
International Classes:
G01V3/08; H03K17/955; H03K17/96; (IPC1-7): H03K17/96; G01V3/08; H03K17/955
Foreign References:
| EP0675600A1 | ||||
| US5189417 | ||||
| DE3119495A1 | ||||
| US5270710 |
Attorney, Agent or Firm:
Toru Tanabe