Electrical capacitance proximity sensor

Details Electrical capacitance proximity sensor Electrical capacitance proximity sensor

2006-11-21

2006-11-21

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S627000, C324S658000

Reexamination Certificate

active

07138809

ABSTRACT:
An electrical capacitance proximity sensor with high detector sensitivity has an insulating substrate, a detector electrode and an earth electrode formed in a fixed pattern on one face of the insulating substrate, and a detector circuit which detects an object approaching the detector electrode and the earth electrode by detecting the capacitance between the detector electrode and the earth electrode. The detector electrode is formed in a shape such that it surrounds the earth electrode.

REFERENCES:
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patent: 5223796 (1993-06-01), Waldman et al.
patent: 5227667 (1993-07-01), Takinami et al.
patent: 5512836 (1996-04-01), Chen et al.
patent: 5917314 (1999-06-01), Heger et al.
patent: 6724324 (2004-04-01), Lambert
patent: 6894507 (2005-05-01), Morimoto

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